04_Spring Boot 多数据源配置：JdbcTemplate
1、pom.xml配置
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
2、application.properties 配置
## 数据源配置
spring.datasource.primary.url=jdbc:mysql://127.0.0.1:3306/test_base_1?useUnicode=true&characterEncoding=utf-8
spring.datasource.primary.username=root
spring.datasource.primary.password=root
spring.datasource.primary.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.secondary.url=jdbc:mysql://127.0.0.1:3306/test_base_1?useUnicode=true&characterEncoding=utf-8
spring.datasource.secondary.username=root
spring.datasource.secondary.password=root
spring.datasource.secondary.driver-class-name=com.mysql.jdbc.Driver
3、数据源配置类：
1）、DataSourceConfig
package com.linjb.config;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.jdbc.core.JdbcTemplate;
@Configuration
public class DataSourceConfig {
@Bean(name = "primaryDataSource")
@Qualifier("primaryDataSource")
@ConfigurationProperties(prefix="spring.datasource.primary")
public DataSource primaryDataSource() {
return DataSourceBuilder.create().build();
}
@Bean(name = "secondaryDataSource")
@Qualifier("secondaryDataSource")
@Primary
@ConfigurationProperties(prefix="spring.datasource.secondary")
public DataSource secondaryDataSource() {
return DataSourceBuilder.create().build();
}
@Bean(name = "primaryJdbcTemplate")
public JdbcTemplate primaryJdbcTemplate(
@Qualifier("primaryDataSource") DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
@Bean(name = "secondaryJdbcTemplate")
public JdbcTemplate secondaryJdbcTemplate(
@Qualifier("secondaryDataSource") DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
}
定义两个DataSource用来读取application.properties中的不同配置。如上例子中，主数据源配置为spring.datasource.primary开头的配置，第二数据源配置为spring.datasource.secondary开头的配置。
对JdbcTemplate的支持比较简单，只需要为其注入对应的datasource即可，如下例子，在创建JdbcTemplate的时候分别注入名为primaryDataSource和secondaryDataSource的数据源来区分不同的JdbcTemplate。
3、Model层
package com.linjb.model;
public class User {
private Integer id;
private String username;
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}
4、Controller层
package com.linjb.controller;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import com.linjb.model.User;
@RestController
@RequestMapping(value = "/user")
public class UserController {
@Autowired
@Qualifier("primaryJdbcTemplate")
protected JdbcTemplate jdbcTemplate1;
@Autowired
@Qualifier("secondaryJdbcTemplate")
protected JdbcTemplate jdbcTemplate2;
@RequestMapping(value="/insertUser", method=RequestMethod.POST)
public String insertUser2(){
// 往第一个数据源中插入两条数据
jdbcTemplate1.update("insert into user(id,username,age) values(?, ?, ?)", 5, "aaa", 20);
jdbcTemplate2.update("insert into user(id,username,age) values(?, ?, ?)", 5, "aaa", 20);
return "success";
}
@RequestMapping(value="/findAllUser1", method=RequestMethod.POST)
public List
return jdbcTemplate1.query("select id,username,age from user ", new UserInfo());
}
public class UserInfo implements RowMapper
@Override
public User mapRow(ResultSet rs, int rowNum) throws SQLException {
User userInfo = new User();
userInfo.setId(rs.getInt("id"));
userInfo.setUsername(rs.getString("username"));
userInfo.setAge(rs.getInt("age"));
return userInfo;
}
}
}
6、Application启动类
package com.linjb;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* Spring Boot应用启动类
* @Copyright Copyright (C) 2019 linjb
* @author linjb
* @version 1.0
* @CreateDate 2019年1月31日下午10:25:16
*/
@SpringBootApplication
public class Application /*extends SpringBootServletInitializer*/{
public static void main(String[] args) {
SpringApplication.run(Application.class,args);
}
// @Override
// protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
//
// return builder.sources(Application.class);
// }
}