SpringBoot + mybatis + mysql 默认配置与手动配置步骤对比二（手动配置）

前提环境已搭建，数据库表已创建。（Eclipse + SpringBoot + mybatis + mysql）

1.创建工程

File->new->other->Spring Boot -> Spring Starter Project ->选择jdk等信息  ->  点击Web，选择Web，然后点击SQL，选择JPA、Mybatis、MYSQL，点击next，Finish。

 

2.文件编辑（以下参考慕课网的视频教程）

2.1修改pom.xml

连接池依赖改为 ：       

   

                com.mchange

                c3p0

                0.9.5.1

           

2.2修改application.properties（src/main/resourcesapplication.properties）

server.port=8082

server.servlet.context-path=/demo

jdbc1.url=jdbc:MySQL://192.168.1.30:30006/数据库名?useUnicode=true&characterEncoding=UTF-8&useSSL=false

jdbc1.username=数据库访问用户

jdbc1.password=数据库访问密码

jdbc1.driver=com.mysql.jdbc.Driver

mybatis_config_file=mybatis-config.xml

mapper_path=/mapper/**.xml

entity_package=com.lele.demo.entity

 

2.3mybatis配置（src/main/resources/mybatis-config.xml）

 

2.4datasource与sessionfactorybean配置

datasource配置(com.lele.demo.config.dao.DataSourceConfiguration.java)

package com.lele.demo.config.dao;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

importcom.mchange.v2.c3p0.ComboPooledDataSource;

import java.beans.PropertyVetoException;

@Configuration

@MapperScan("com.lele.demo.dao.first")

public class DataSourceConfiguration {

     @Value("${jdbc1.driver}")

     private String jdbcDriver;

     @Value("${jdbc1.url}")

     private String jdbcUrl;

     @Value("${jdbc1.username}")

     private String jdbcUserName;    

     @Value("${jdbc1.password}")

     private String jdbcPassword;

           

     @Bean(name = "dataSource")

     public ComboPooledDataSource createDataSource() throws PropertyVetoException{

           ComboPooledDataSource dataSource = new ComboPooledDataSource();

           dataSource.setDriverClass(jdbcDriver);          

           dataSource.setJdbcUrl(jdbcUrl);

           dataSource.setUser(jdbcUserName);

           dataSource.setPassword(jdbcPassword);

           //关闭连接后不自动commit

           dataSource.setAutoCommitOnClose(false);

           return dataSource;           

     }

 

sessionfactorybean配置(com.lele.demo.config.dao.SessionFactoryConfiguration.java)

package com.lele.demo.config.dao;

import java.io.IOException;

import javax.sql.DataSource;

import org.mybatis.spring.SqlSessionFactoryBean;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.core.io.ClassPathResource;

import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

@Configuration

public class SessionFactoryConfiguration {

     @Value("${mybatis_config_file}")

     private String mybatisConfigFilePath;

     @Value("${mapper_path}")

     private String mapperPath;

     @Value("${entity_package}")

     private String entityPackage;

     @Autowired

     @Qualifier("dataSource")

     private DataSource dataSource;

     @Bean(name = "sqlSessionFactory")

     public SqlSessionFactoryBean createSqlSessionFactoryBean() throws IOException {

           SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();

           sqlSessionFactoryBean.setConfigLocation(new ClassPathResource(mybatisConfigFilePath));

           PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

           String packageSearchPath = PathMatchingResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + mapperPath;

          sqlSessionFactoryBean.setMapperLocations(resolver.getResources(packageSearchPath));

           sqlSessionFactoryBean.setDataSource(dataSource);

          sqlSessionFactoryBean.setTypeAliasesPackage(entityPackage);

           return sqlSessionFactoryBean;

     }

}

 

2.5创建实体类 -- 同默认配置一样

2.6 mapper创建（com.lele.demo.dao.UserDao.java)

package com.lele.demo.dao;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;

import com.lele.demo.entity.User;

@Mapper

public interface UserDao {

      /** * 根据主键查询*/

     User selectUserById(Long id);

}

 

2.7 mapper.xml创建（src/main/resources/mapper/UserDao.xml）

     

           SELECT *

           FROM

           pisp_pub_user

           WHERE PUB_USER_ID=#{id}

     

 

2.8 service配置：将Dao的接口组合使用，实现事务（TransactionManagementConfiguration）

package com.lele.demo.config.service;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.TransactionManagementConfigurer;
@Configuration
@EnableTransactionManagement
public class TransactionManagementConfiguration  implements TransactionManagementConfigurer{
     @Autowired
     private DataSource dataSource;
     @Override
     public PlatformTransactionManager annotationDrivenTransactionManager(){
           return new DataSourceTransactionManager(dataSource);
     }
}

2.9 service接口

package com.lele.demo.service;

import java.util.List;

import com.lele.demo.entity.User;

public interface UserService {

     User selectUserById(Long id);

}

2.10 接口实现serviceImpl

package com.lele.demo.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import com.lele.demo.dao.UserDao;

import com.lele.demo.entity.User;

import com.lele.demo.service.UserService;

@Service

public class UserServiceImpl implements UserService{

@Autowired

private UserDao userDao;


     @Override

     public User selectUserById(Long id) {

           // TODO Auto-generated method stub

           return userDao.selectUserById(id);

     }


}

2.11 Controller层
 

package com.lele.demo.web;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RestController;

import com.lele.demo.service.UserService;

@RestController

@RequestMapping("/superadmin")

public class UserController {

     @Autowired

     private UserService userService;

     

     @RequestMapping(value="/selectTel", method = RequestMethod.GET)

     private Map listTel(){

           Map telMap = new HashMap();

           Listlist =  userService.selectTel();

           telMap.put("telMap",list);

           return telMap;

     }

}

2.12应用入口

package com.lele.demo;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})//将spring boot自带的DataSourceAutoConfiguration禁掉，因为它会读取application.properties文件的spring.datasource.*属性并自动配置单数据源
@MapperScan("com.lele.demo.dao")
public class Springboot2Application {

	public static void main(String[] args) {
		SpringApplication.run(Springboot2Application.class, args);
	}
}

 

完成，运行程序， 打开浏览器，输入http://127.0.0.1:8082/demo/superadmin/selectTel ， 返回查询结果  （关于查询get的方法可以用浏览器， post方法要用postMan调用接口测试，淡然get方法页可以用postMan）