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
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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-transactionalsrcmainresourcesapplication.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://gitee.com/ylimhhmily/SpringCloudTutorial.git
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