SpringCloud（第 042 篇）链接Mysql数据库,通过JdbcTemplate编写数据库访问,而且支持事物处理机制

一、大致介绍

1、在数据库操作中，当遇到异常时，我们最关心的是部分回滚还是整体回滚还是不理会，怎么操作怎么来； 2、所以本章节就着重讲解了如何运用Transactional注解来处理事物回滚机制； 3、rollbackFor 属性：抛出的异常是 rollbackFor 异常的子类时都会回滚数据； 4、noRollbackFor 属性：抛出的异常是 noRollbackFor 异常的子类时不会回滚数据；抛出的异常不是 noRollbackFor 异常的子类时会回滚数据； 

二、实现步骤

2.1 添加 maven 引用包

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">     <modelVersion>4.0.0</modelVersion>  	<artifactId>springms-provider-user-mysql-jdbctemplate-transactional</artifactId>     <version>1.0-SNAPSHOT</version>     <packaging>jar</packaging> 	     <parent>         <groupId>com.springms.cloud</groupId>         <artifactId>springms-spring-cloud</artifactId>         <version>1.0-SNAPSHOT</version>     </parent> 	 	<dependencies>         <!-- 访问数据库模块 -->         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-data-jpa</artifactId>         </dependency>          <!-- web模块 -->         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>         </dependency>          <!-- MYSQL -->         <dependency>             <groupId>mysql</groupId>             <artifactId>mysql-connector-java</artifactId>         </dependency>     </dependencies>  </project> 

2.2 添加应用配置文件（springms-provider-user-mysql-jdbctemplate-transactional\src\main\resources\application.yml）

server:   port: 8335 spring:   application:     name: springms-provider-user-mysql-jdbctemplate-transactional  #全部小写   ##################################################################################################### # mysql 属性配置   datasource:     driver-class-name: com.mysql.jdbc.Driver     url: jdbc:mysql://ip:3306/hmilyylimh     username: username     password: password   jpa:     hibernate:       #ddl-auto: create #ddl-auto:设为create表示每次都重新建表       ddl-auto: update #ddl-auto:设为update表示每次都不会重新建表     show-sql: true #####################################################################################################        ##################################################################################################### # 打印日志 logging:   level:     root: INFO     org.hibernate: INFO     org.hibernate.type.descriptor.sql.BasicBinder: TRACE     org.hibernate.type.descriptor.sql.BasicExtractor: TRACE     com.springms: DEBUG #####################################################################################################  

2.3 添加实体用户类User（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/entity/User.java）

package com.springms.cloud.entity;  public class User {    private Long id;    private String username;    private String name;    private Integer age;    private String balance;    public Long getId() {     return this.id;   }    public void setId(Long id) {     this.id = id;   }    public String getUsername() {     return this.username;   }    public void setUsername(String username) {     this.username = username;   }    public String getName() {     return this.name;   }    public void setName(String name) {     this.name = name;   }    public Integer getAge() {     return this.age;   }    public void setAge(Integer age) {     this.age = age;   }    public String getBalance() {     return this.balance;   }    public void setBalance(String balance) {     this.balance = balance;   }    @Override   public String toString() {     return "User{" +             "id=" + id +             ", username='" + username + '\'' +             ", name='" + name + '\'' +             ", age=" + age +             ", balance='" + balance + '\'' +             '}';   } } 

2.4 添加实体账户类Account（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/entity/Account.java）

package com.springms.cloud.entity;  public class Account {     private int id ;     private String name ;     private double money;      public int getId() {         return id;     }      public void setId(int id) {         this.id = id;     }      public String getName() {         return name;     }      public void setName(String name) {         this.name = name;     }      public double getMoney() {         return money;     }      public void setMoney(double money) {         this.money = money;     }      @Override     public String toString() {         return "Account{" +                 "id=" + id +                 ", name='" + name + '\'' +                 ", money=" + money +                 '}';     } }   

2.5 添加用户DAO接口（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/dao/IUserDao.java）

package com.springms.cloud.dao;  import com.springms.cloud.entity.User;  import java.util.List;  /**  * 简单用户链接Mysql数据库微服务（通过@Repository注解标注该类为持久化操作对象）。  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ public interface IUserDao {      User findUserById(Long id);      List<User> findAllUsers();      int insertUser(User user);      int addUser(User user);      int replaceUser(User user); } 

2.6 添加账号DAO接口（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/dao/IAccountDao.java）

package com.springms.cloud.dao;  import com.springms.cloud.entity.Account;  import java.util.List;   public interface IAccountDao {      int add(Account account);      int update(Account account);      int delete(int id);      Account findAccountById(int id);      List<Account> findAccountList(); }  

2.7 添加用户DAO接口实现类（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/dao/impl/UserDaoImpl.java）

package com.springms.cloud.dao.impl;  import com.springms.cloud.dao.IUserDao; import com.springms.cloud.entity.User; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.BeanPropertyRowMapper; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.jdbc.core.RowMapper; import org.springframework.stereotype.Repository;  import java.util.List;  /**  * 简单用户链接Mysql数据库微服务（通过@Repository注解标注该类为持久化操作对象）。  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ @Repository public class UserDaoImpl implements IUserDao {      /**      * 通过@Resource注解引入JdbcTemplate对象。      */     @Autowired     private JdbcTemplate jdbcTemplate;      @Override     public User findUserById(Long id){         // 1. 定义一个sql语句         String querySQL = "select * from user where id = ?";          // 2. 定义一个RowMapper         RowMapper<User> rowMapper = new BeanPropertyRowMapper<User>(User.class);          // 3. 执行查询方法          //List<User> list = jdbcTemplate.query("select * from account where id = ?", new Object[]{id}, new BeanPropertyRowMapper(User.class));          User user = jdbcTemplate.queryForObject(querySQL, new Object[]{id}, rowMapper);          return user;     }      @Override     public List<User> findAllUsers(){         // 1. 定义一个sql语句         String querySQL = "select * from user";          // 2. 定义一个RowMapper         RowMapper<User> rowMapper = new BeanPropertyRowMapper<User>(User.class);          // 3. 执行查询方法         List<User> users = jdbcTemplate.query(querySQL, new Object[]{}, rowMapper);          return users;     }      @Override     public int insertUser(User user) {         // 1. 定义一个sql语句         String execSQL = "INSERT into user (username, name, age, balance) values (?, ?, ?, ?)";          // 2. 执行查询方法         int result = jdbcTemplate.update(execSQL,                 new Object[]{user.getUsername(), user.getName(), user.getAge(), user.getBalance()});          return result;     }      @Override     public int addUser(User user) {         // 1. 定义一个sql语句         String execSQL = "INSERT into user (username, name, age, balance) values (?, ?, ?, ?)";          // 2. 执行查询方法         int result = jdbcTemplate.update(execSQL,                 new Object[]{user.getUsername(), user.getName(), user.getAge(), user.getBalance()});          return result;     }      @Override     public int replaceUser(User user) {         // 1. 定义一个sql语句         String execSQL = "INSERT into user (username, name, age, balance) values (?, ?, ?, ?)";          // 2. 执行查询方法         int result = jdbcTemplate.update(execSQL,                 new Object[]{user.getUsername(), user.getName(), user.getAge(), user.getBalance()});          return result;     } } 

2.8 添加账号DAO接口实现类（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/dao/impl/AccountDaoImpl.java）

package com.springms.cloud.dao.impl;  import com.springms.cloud.dao.IAccountDao; import com.springms.cloud.entity.Account; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.BeanPropertyRowMapper; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.stereotype.Repository;  import java.util.List;   @Repository public class AccountDaoImpl implements IAccountDao {      @Autowired     private JdbcTemplate jdbcTemplate;      @Override     public int add(Account account) {         return jdbcTemplate.update("insert into account(name, money) values(?, ?)",               account.getName(),account.getMoney());      }      @Override     public int update(Account account) {         return jdbcTemplate.update("UPDATE  account SET NAME=? ,money=? WHERE id=?",                 account.getName(),account.getMoney(),account.getId());     }      @Override     public int delete(int id) {         return jdbcTemplate.update("DELETE from TABLE account where id=?",id);     }      @Override     public Account findAccountById(int id) {         List<Account> list = jdbcTemplate.query("select * from account where id = ?", new Object[]{id}, new BeanPropertyRowMapper(Account.class));         if(list!=null && list.size()>0){             Account account = list.get(0);             return account;         }else{             return null;         }     }      @Override     public List<Account> findAccountList() {         List<Account> list = jdbcTemplate.query("select * from account", new Object[]{}, new BeanPropertyRowMapper(Account.class));         if(list!=null && list.size()>0){             return list;         }else{             return null;         }     } } 

2.9 添加用户Service接口（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/service/IUserService.java）

package com.springms.cloud.service.impl;  import com.springms.cloud.dao.IUserDao; import com.springms.cloud.entity.User; import com.springms.cloud.exception.BusinessExtendsException; import com.springms.cloud.exception.RollbackExceptionExtendsRuntimeException; import com.springms.cloud.service.IUserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Isolation; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional;  import java.util.List;  /**  * 简单用户链接Mysql数据库微服务（通过@Service注解标注该类为持久化操作对象）。  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ @Service public class UserServiceImpl implements IUserService{      @Autowired     private IUserDao userDao;      @Transactional(readOnly = true)     @Override     public User findUserById(Long id){         return userDao.findUserById(id);     }      @Transactional(readOnly = true)     @Override     public List<User> findAllUsers(){         return userDao.findAllUsers();     }      /**      * 由于 RuntimeExcepackage com.springms.cloud.service;                                            import com.springms.cloud.entity.User;                                            import java.util.List;                                            /**                       * 简单用户链接Mysql数据库微服务（通过@Service注解标注该类为持久化操作对象）。                       *                       * @author hmilyylimh                       *                       * @version 0.0.1                       *                       * @date 17/10/18                       *                       */                      public interface IUserService {                                                User findUserById(Long id);                                                List<User> findAllUsers();                                                int insertUser(User user);                                                int addUser(User user);                                                int replaceUser(User user) throws Exception;                      }  

2.10 添加账号Service接口（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/service/IAccountService.java）

package com.springms.cloud.service;  import com.springms.cloud.entity.Account;  import java.util.List;   public interface IAccountService {       int add(Account account);      int update(Account account);      int delete(int id);      Account findAccountById(int id);      List<Account> findAccountList();  }  

2.11 添加电影Service接口（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/service/IMovieService.java）

package com.springms.cloud.service;  import com.springms.cloud.entity.Account; import com.springms.cloud.entity.User;  /**  * 简单用户链接Mysql数据库微服务（通过@Service注解标注该类为持久化操作对象）。  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ public interface IMovieService {      int addMovie(User user, Account account);      int insertMovie(User user, Account account) throws Exception; }  

2.12 添加用户Service接口实现类（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/service/impl/UserServiceImpl.java）

package com.springms.cloud.service.impl;  import com.springms.cloud.dao.IUserDao; import com.springms.cloud.entity.User; import com.springms.cloud.exception.BusinessExtendsException; import com.springms.cloud.exception.RollbackExceptionExtendsRuntimeException; import com.springms.cloud.service.IUserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Isolation; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional;  import java.util.List;  /**  * 简单用户链接Mysql数据库微服务（通过@Service注解标注该类为持久化操作对象）。  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ @Service public class UserServiceImpl implements IUserService{      @Autowired     private IUserDao userDao;      @Transactional(readOnly = true)     @Override     public User findUserById(Long id){         return userDao.findUserById(id);     }      @Transactional(readOnly = true)     @Override     public List<User> findAllUsers(){         return userDao.findAllUsers();     }      /**      * 由于 RuntimeException、RollbackExceptionExtendsRuntimeException 是 Exception 的子类，所以属于 Exception 的子类异常抛出来，都会回滚数据。      *      * @param user      * @return      */     @Transactional(propagation = Propagation.REQUIRED, isolation= Isolation.DEFAULT, rollbackFor = Exception.class)     @Override     public int insertUser(User user) {         int result = userDao.insertUser(user);          if(result > 0){             // throw new RuntimeException("抛出 RuntimeException 异常，测试 rollbackFor = Exception.class 是否有效？");             throw new RollbackExceptionExtendsRuntimeException("抛出 RollbackExceptionExtendsRuntimeException 异常，测试 rollbackFor = Exception.class 是否有效？");         }          return result;     }      @Override     public int addUser(User user) {         return userDao.addUser(user);     }      /**      *      * 由于 RollbackExceptionExtendsException 是 Exception 的子类，不是 BusinessExtendsException 的子类，所以抛出该异常，会回滚数据；<br/>      *      * <li>注意：如果要使得 noRollbackFor 属性生效，注解中 @Transactional 必须得只有 noRollbackFor 属性，然后 noRollbackFor 的异常必须得是自己定义的异常，然后抛 RuntimeException 异常，这样我们才可以测出 noRollbackFor 回滚与不回滚的场景出来；</li>      *      * @param user      * @return      */     @Transactional(noRollbackFor = BusinessExtendsException.class)     @Override     public int replaceUser(User user) throws Exception {         int result = userDao.insertUser(user);          if(result > 0){             // throw new NullPointerException("抛出 NullPointerException 异常，测试 noRollbackFor = RuntimeException.class 是否有效？");             // throw new RollbackExceptionExtendsException("抛出 RollbackExceptionExtendsException 异常，测试 noRollbackFor = RuntimeException.class 是否有效？");             // throw new BusinessSubExtendsException("抛出 BusinessSubExtendsException 异常，测试 noRollbackFor = RuntimeException.class 是否有效？");             throw new RuntimeException("抛出 RuntimeException 异常，测试 noRollbackFor = RuntimeException.class 是否有效？");         }          return result;     } } 

2.12 添加账号Service接口实现类（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/service/impl/AccountServiceImpl.java）

package com.springms.cloud.service.impl;  import com.springms.cloud.dao.IAccountDao; import com.springms.cloud.entity.Account; import com.springms.cloud.service.IAccountService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service;  import java.util.List;   @Service public class AccountServiceImpl implements IAccountService {      @Autowired     IAccountDao accountDAO;      @Override     public int add(Account account) {         return accountDAO.add(account);     }      @Override     public int update(Account account) {         return accountDAO.update(account);     }      @Override     public int delete(int id) {         return accountDAO.delete(id);     }      @Override     public Account findAccountById(int id) {         return accountDAO.findAccountById(id);     }      @Override     public List<Account> findAccountList() {         return accountDAO.findAccountList();     } } 

2.13 添加电影Service接口实现类（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/service/impl/MovieServiceImpl.java）

package com.springms.cloud.service.impl;  import com.springms.cloud.dao.IAccountDao; import com.springms.cloud.dao.IUserDao; import com.springms.cloud.entity.Account; import com.springms.cloud.entity.User; import com.springms.cloud.exception.BusinessExtendsException; import com.springms.cloud.exception.BusinessSubExtendsException; import com.springms.cloud.service.IMovieService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Isolation; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional;  /**  * 简单用户链接Mysql数据库微服务（通过@Service注解标注该类为持久化操作对象）。  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ @Service public class MovieServiceImpl implements IMovieService {      @Autowired     private IUserDao userDao;      @Autowired     private IAccountDao accountDao;      @Transactional(propagation = Propagation.REQUIRED, isolation= Isolation.DEFAULT, rollbackFor = Exception.class)     @Override     public int addMovie(User user, Account account) {          int result1 = userDao.addUser(user);         int result2 = accountDao.add(account);          if(result1 > 0 || result2 > 0){             throw new RuntimeException("抛出 RuntimeException 异常，测试 rollbackFor = Exception.class 是否有效？");         }          return 0;     }      @Transactional(noRollbackFor = BusinessExtendsException.class)     @Override     public int insertMovie(User user, Account account) throws Exception {          int result1 = userDao.insertUser(user);         int result2 = accountDao.add(account);          if(result1 > 0 || result2 > 0){             // throw new NullPointerException("抛出 NullPointerException 异常，测试 noRollbackFor = RuntimeException.class 是否有效？");             // throw new RollbackExceptionExtendsException("抛出 RollbackExceptionExtendsException 异常，测试 noRollbackFor = RuntimeException.class 是否有效？");             throw new BusinessSubExtendsException("抛出 BusinessSubExtendsException 异常，测试 noRollbackFor = RuntimeException.class 是否有效？");             // throw new RuntimeException("抛出 RuntimeException 异常，测试 noRollbackFor = RuntimeException.class 是否有效？");         }          return 0;     } } 

2.14 添加继承Exception的异常类BusinessExtendsException（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/exception/BusinessExtendsException.java）

package com.springms.cloud.exception;  /**  *  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ public class BusinessExtendsException extends Exception {      public BusinessExtendsException() {     }      public BusinessExtendsException(String message) {         super(message);     }      public BusinessExtendsException(String message, Throwable cause) {         super(message, cause);     }      public BusinessExtendsException(Throwable cause) {         super(cause);     }      public BusinessExtendsException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {         super(message, cause, enableSuppression, writableStackTrace);     } }  

2.15 添加继承BusinessExtendsException的异常类（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/exception/BusinessSubExtendsException.java）

package com.springms.cloud.exception;  /**  *  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ public class BusinessSubExtendsException extends BusinessExtendsException {      public BusinessSubExtendsException() {     }      public BusinessSubExtendsException(String message) {         super(message);     }      public BusinessSubExtendsException(String message, Throwable cause) {         super(message, cause);     }      public BusinessSubExtendsException(Throwable cause) {         super(cause);     }      public BusinessSubExtendsException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {         super(message, cause, enableSuppression, writableStackTrace);     } }  

2.16 添加继承Exception的异常类RollbackExceptionExtendsException（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/exception/RollbackExceptionExtendsException.java）

package com.springms.cloud.exception;  /**  *  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ public class RollbackExceptionExtendsException extends Exception {      public RollbackExceptionExtendsException() {     }      public RollbackExceptionExtendsException(String message) {         super(message);     }      public RollbackExceptionExtendsException(String message, Throwable cause) {         super(message, cause);     }      public RollbackExceptionExtendsException(Throwable cause) {         super(cause);     }      public RollbackExceptionExtendsException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {         super(message, cause, enableSuppression, writableStackTrace);     } }  

2.17 添加继承RuntimeException的异常类（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/exception/RollbackExceptionExtendsRuntimeException.java）

package com.springms.cloud.exception;  /**  * 回滚异常，测试语句：@Transactional(propagation = Propagation.REQUIRED, isolation= Isolation.DEFAULT, rollbackFor = Exception.class) 是否生效。  *  * 结果：含有该属性的 rollbackFor = Exception.class，只要抛出的异常属于 Exception 的子类的话，就可以正常回滚数据；  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ public class RollbackExceptionExtendsRuntimeException extends RuntimeException {      public RollbackExceptionExtendsRuntimeException() {     }      public RollbackExceptionExtendsRuntimeException(String message) {         super(message);     }      public RollbackExceptionExtendsRuntimeException(String message, Throwable cause) {         super(message, cause);     }      public RollbackExceptionExtendsRuntimeException(Throwable cause) {         super(cause);     }      public RollbackExceptionExtendsRuntimeException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {         super(message, cause, enableSuppression, writableStackTrace);     } }  

2.18 添加用户Web访问层Controller（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/controller/UserMysqlJdbcTransactionalController.java）

package com.springms.cloud.controller;  import com.springms.cloud.service.IUserService; import com.springms.cloud.entity.User; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*;  import java.util.ArrayList; import java.util.List;  /**  * 用户微服务Controller。  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ @RestController public class UserMysqlJdbcTransactionalController {      @Autowired     private IUserService userService;      @GetMapping("/simplejdbc/{id}")     public User findUserById(@PathVariable Long id) {         return this.userService.findUserById(id);     }      @GetMapping("/simplejdbc/list")     public List<User> findAllUsers() {         List<User> users  = this.userService.findAllUsers();          List<User> resultUsers = new ArrayList<>(users.subList(users.size()-6, users.size()));          return resultUsers;     }      /**      * 添加一个student,使用postMapping接收post请求      *      * http://localhost:8315/simple/addUser?username=user11&age=11&balance=11      *      * @return      */     @PostMapping("/simplejdbc/insertUser")     public User insertUser(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance){         User user=new User();          user.setUsername(username);         user.setName(username);         user.setAge(age);         user.setBalance(balance);          int result = userService.insertUser(user);         if(result > 0){             return user;         }          user.setId(0L);         user.setName(null);         user.setUsername(null);         user.setBalance(null);         return user;     }      /**      * 添加一个student,使用postMapping接收post请求      *      * http://localhost:8315/simple/addUser?username=user11&age=11&balance=11      *      * @return      */     @PostMapping("/simplejdbc/addUser")     public User addUser(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance){         User user=new User();          user.setUsername(username);         user.setName(username);         user.setAge(age);         user.setBalance(balance);          int result = userService.addUser(user);         if(result > 0){             return user;         }          user.setId(0L);         user.setName(null);         user.setUsername(null);         user.setBalance(null);         return user;     }      /**      * 添加一个student,使用postMapping接收post请求      *      * http://localhost:8315/simple/addUser?username=user11&age=11&balance=11      *      * @return      */     @PostMapping("/simplejdbc/replaceUser")     public User replaceUser(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance) throws Exception     {         User user=new User();          user.setUsername(username);         user.setName(username);         user.setAge(age);         user.setBalance(balance);          int result = 0;         result = userService.replaceUser(user);          user.setId((long) 0);         user.setName(null);         user.setUsername(null);         user.setBalance(null);         return user;     } } 

2.19 添加账号Web访问层Controller（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/controller/AccountController.java）

package com.springms.cloud.controller;  import com.springms.cloud.entity.Account; import com.springms.cloud.service.IAccountService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*;  import java.util.List;   @RestController @RequestMapping("/account") public class AccountController {      @Autowired     IAccountService accountService;      @RequestMapping(value = "/list",method = RequestMethod.GET)     public  List<Account> getAccounts(){        return accountService.findAccountList();     }      @RequestMapping(value = "/{id}",method = RequestMethod.GET)     public  Account getAccountById(@PathVariable("id") int id){         return accountService.findAccountById(id);     }      @RequestMapping(value = "/{id}",method = RequestMethod.PUT)     public  String updateAccount(@PathVariable("id")int id , @RequestParam(value = "name",required = true)String name,     @RequestParam(value = "money" ,required = true)double money){         Account account=new Account();         account.setMoney(money);         account.setName(name);         account.setId(id);         int t=accountService.update(account);         if(t==1){             return account.toString();         }else {             return "fail";         }     }      @RequestMapping(value = "",method = RequestMethod.POST)     public  String postAccount( @RequestParam(value = "name")String name,                                  @RequestParam(value = "money" )double money){         Account account=new Account();         account.setMoney(money);         account.setName(name);         int t= accountService.add(account);         if(t==1){             return account.toString();         }else {             return "fail";         }     } } 

2.20 添加电影Web访问层Controller（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/controller/MovieMysqlJdbcTransactionalController.java）

package com.springms.cloud.controller;  import com.springms.cloud.entity.Account; import com.springms.cloud.entity.User; import com.springms.cloud.service.IMovieService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*;  /**  * 用户微服务电影Controller。  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ @RestController public class MovieMysqlJdbcTransactionalController {      @Autowired     private IMovieService moiveService;      /**      * 添加一个student,使用postMapping接收post请求      *      * http://localhost:8335/simple/addUser?username=user11&age=11&balance=11      *      * @return      */     @PostMapping("/movie/addMovie")     public User addMovie(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance){         User user=new User();          user.setUsername(username);         user.setName(username);         user.setAge(age);         user.setBalance(balance);          Account account = new Account();         account.setName(username);         account.setMoney(Double.parseDouble(balance));          int result = moiveService.addMovie(user, account);         if(result > 0){             return user;         }          user.setId(0L);         user.setName(null);         user.setUsername(null);         user.setBalance(null);         return user;     }      /**      * 添加一个student,使用postMapping接收post请求      *      * http://localhost:8335/simple/addUser?username=user11&age=11&balance=11      *      * @return      */     @PostMapping("/movie/insertMovie")     public User insertMovie(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance) throws Exception {         User user=new User();          user.setUsername(username);         user.setName(username);         user.setAge(age);         user.setBalance(balance);          Account account = new Account();         account.setName(username);         account.setMoney(Double.parseDouble(balance));          int result = moiveService.insertMovie(user, account);         if(result > 0){             return user;         }          user.setId(0L);         user.setName(null);         user.setUsername(null);         user.setBalance(null);         return user;     } } 

2.21 添加微服务启动类（springms-provider-user-mysql-jdbctemplate-transactional/src/main/java/com/springms/cloud/MsProviderUserMysqlJdbcTransactionalApplication.java）

package com.springms.cloud;  import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication;  /**  * 链接Mysql数据库,通过JdbcTemplate编写数据库访问,而且支持事物处理机制。  *  * @author hmilyylimh  *  * @version 0.0.1  *  * @date 17/10/18  *  */ @SpringBootApplication public class MsProviderUserMysqlJdbcTransactionalApplication {  	public static void main(String[] args) { 		SpringApplication.run(MsProviderUserMysqlJdbcTransactionalApplication.class, args); 		System.out.println("【【【【【【 链接MysqlJdbcTransactional数据库微服务 】】】】】】已启动."); 	} } 

三、测试

/****************************************************************************************  一、简单用户链接Mysql数据库微服务（通过JdbcTemplate编写数据访问，而且支持事物处理机制，使用 rollbackFor 属性，数据回滚）：   1、给 insertUser 方法添加注解：@Transactional(propagation = Propagation.REQUIRED, isolation= Isolation.DEFAULT, rollbackFor = Exception.class)；  2、insertUser 抛出 RollbackExceptionExtendsRuntimeException 异常；  3、启动 springms-provider-user-mysql-jdbctemplate-transactional 模块服务，启动1个端口；  4、在浏览器输入地址 http://localhost:8315/simplejdbc/list 可以看到所有用户信息成功的被打印出来；   5、使用 REST Client 执行 "/simplejdbc/insertUser" 添加参数执行接口，结果数据没有入库，数据被回滚了；  ****************************************************************************************/  /****************************************************************************************  二、简单用户链接Mysql数据库微服务（通过JdbcTemplate编写数据访问，而且支持事物处理机制，使用 noRollbackFor 属性，数据回滚）：   1、给 replaceUser 方法添加注解：@Transactional(noRollbackFor = BusinessExtendsException.class)；  2、replaceUser 抛出 RuntimeException 异常；  3、启动 springms-provider-user-mysql-jdbctemplate-transactional 模块服务，启动1个端口；  4、在浏览器输入地址 http://localhost:8315/simplejdbc/list 可以看到所有用户信息成功的被打印出来；   5、使用 REST Client 执行 "/simplejdbc/replaceUser" 添加参数执行接口，结果数据没有入库，数据被回滚了；  ****************************************************************************************/  /****************************************************************************************  三、简单用户链接Mysql数据库微服务（通过JdbcTemplate编写数据访问，而且支持事物处理机制，使用 noRollbackFor 属性，数据没有回滚）：   1、给 replaceUser 方法添加注解：@Transactional(noRollbackFor = BusinessExtendsException.class)；  2、replaceUser 抛出 BusinessSubExtendsException 异常；  3、启动 springms-provider-user-mysql-jdbctemplate-transactional 模块服务，启动1个端口；  4、在浏览器输入地址 http://localhost:8315/simplejdbc/list 可以看到所有用户信息成功的被打印出来；   5、使用 REST Client 执行 "/simplejdbc/replaceUser" 添加参数执行接口，结果数据已经入库了，数据没有回滚了；   注意：如果要使得 noRollbackFor 属性生效，注解中 @Transactional 必须得只有 noRollbackFor 属性，然后 noRollbackFor 的异常必须得是自己定义的异常，然后抛 RuntimeException 异常，这样我们才可以测出 noRollbackFor 回滚与不回滚的场景出来；  ****************************************************************************************/  /****************************************************************************************  四、简单用户链接Mysql数据库微服务（通过JdbcTemplate编写数据访问，而且支持事物处理机制，同时操作多个DAO文件入库，然后选择注解是否进行回滚数据）：   这里就不做多的解释了，MovieServiceImpl 就是操作多个DAO文件入库，然后处理是否回滚数据的。   注意：如果要使得 noRollbackFor 属性生效，注解中 @Transactional 必须得只有 noRollbackFor 属性，然后 noRollbackFor 的异常必须得是自己定义的异常，然后抛 RuntimeException 异常，这样我们才可以测出 noRollbackFor 回滚与不回滚的场景出来；   rollbackFor 属性：抛出的异常是 rollbackFor 异常的子类时都会回滚数据；  noRollbackFor 属性：抛出的异常是 noRollbackFor 异常的子类时不会回滚数据；抛出的异常不是 noRollbackFor 异常的子类时会回滚数据；  ****************************************************************************************/  

四、下载地址

https://git.oschina.net/ylimhhmily/SpringCloudTutorial.git

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