详解springboot采用多数据源对JdbcTemplate配置的方法

springboot多数据源配置，代码如下

DataSourceConfig

package com.rookie.bigdata.config;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.sql.DataSource;

/**
* @author
* @date 2018/10/10
*/
@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);
}

}

StudentServiceImpl

package com.rookie.bigdata.service;

import com.rookie.bigdata.domain.Student;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Service;

/**
* @author
* @date 2018/10/9
*/
@Service
public class StudentServiceImpl implements StudentService {

@Autowired
@Qualifier("primaryJdbcTemplate")
private JdbcTemplate jdbcTemplate;

@Autowired
@Qualifier("secondaryJdbcTemplate")
private JdbcTemplate jdbcTemplate2;

/**
* 采用第一个暑假源进行插入数据
* @param student
*/
@Override
public void create(Student student) {

jdbcTemplate.update("INSERT INTO student(stu_no,name,age)VALUE (?,?,?)", student.getStuNo(), student.getName(), student.getAge());

}

/**
* 第一个数据源进行插入数据
* @param stuNo
*/
@Override
public void deleteByNo(Integer stuNo) {
jdbcTemplate.update("DELETE FROM student WHERE stu_no=?", stuNo);
}

/**
* 第二个数据源进行查询数据
* @param stuNo
* @return
*/
@Override
public Integer queryByStuNo(Integer stuNo) {
return jdbcTemplate2.queryForObject("select count(1) from student", Integer.class);
}
}

配置文件 application.properties

spring.datasource.primary.url=jdbc:mysql://localhost:3306/springboot
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://localhost:3306/springboot
spring.datasource.secondary.username=root
spring.datasource.secondary.password=root
spring.datasource.secondary.driver-class-name=com.mysql.jdbc.Driver

测试代码如下

package com.rookie.bigdata.service;

import com.rookie.bigdata.domain.Student;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

/**
* @author liuxili
* @date 2018/10/10
*/

@RunWith(SpringRunner.class)
@SpringBootTest
public class StudentServiceImplTest {

@Autowired
private StudentServiceImpl studentService;

@Test
public void create1() throws Exception {
Student student = new Student();
student.setStuNo(1L);
student.setName("张三");
student.setAge(23);
studentService.create(student);
}
@Test
public void deleteByName1() throws Exception {
studentService.deleteByNo(1);
}
@Test
public void queryByStuNo1() throws Exception {
System.out.println(studentService.queryByStuNo(1));

}
}

在运行的时候会出现如下异常问题，运行失败，报出java.lang.IllegalArgumentException: jdbcUrl is required with driverClassName.异常

后来经过查资料，发现出现该问题的原因是由于springboot版本的问题，本实例采用的springboot版本为2.0.5，如果将版本改为1.5以前的版本就不会出现如上的问题，其实解决上面的异常主要有如下两种解决方案

方案一：

按照如下方案进行修改application.properties配置文件，如下：修改完成后，上面的异常不会再出现

spring.datasource.primary.jdbc-url=jdbc:mysql://localhost:3306/springboot
spring.datasource.primary.username=root
spring.datasource.primary.password=root
spring.datasource.primary.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.secondary.jdbc-url=jdbc:mysql://localhost:3306/springboot
spring.datasource.secondary.username=root
spring.datasource.secondary.password=root
spring.datasource.secondary.driver-class-name=com.mysql.jdbc.Driver

方案二：

原有的application.properties配置文件不进行修改，修改DataSourceConfig类中的信息，如下:修改完成后，异常也不会再出现能够正常运行

application.properties

spring.datasource.primary.url=jdbc:mysql://localhost:3306/springboot
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://localhost:3306/springboot
spring.datasource.secondary.username=root
spring.datasource.secondary.password=root
spring.datasource.secondary.driver-class-name=com.mysql.jdbc.Driver

DataSourceConfig

package com.rookie.bigdata.config;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
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;
import javax.sql.DataSource;
/**
* @author
* @date 2018/10/10
*/
@Configuration
public class DataSourceConfig {
@Bean(name = "primaryJdbcTemplate")
public JdbcTemplate primaryJdbcTemplate(
@Qualifier("primaryDataSource") DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
@Bean(name = "secondaryJdbcTemplate")
public JdbcTemplate secondaryJdbcTemplate(
@Qualifier("primaryDataSource") DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
@Primary
@Bean(name = "primaryDataSourceProperties")
@Qualifier("primaryDataSourceProperties")
@ConfigurationProperties(prefix = "spring.datasource.primary")
public DataSourceProperties primaryDataSourceProperties() {
return new DataSourceProperties();
}
@Bean(name = "secondaryDataSourceProperties")
@Qualifier("secondaryDataSourceProperties")
@ConfigurationProperties(prefix = "spring.datasource.secondary")
public DataSourceProperties secondaryDataSourceProperties() {
return new DataSourceProperties();
}

@Primary
@Bean(name = "primaryDataSource")
@Qualifier("primaryDataSource")
@ConfigurationProperties(prefix = "spring.datasource.primary")
public DataSource primaryDataSource() {

return primaryDataSourceProperties().initializeDataSourceBuilder().build();
}
@Bean(name = "secondaryDataSource")
@Qualifier("secondaryDataSource")
@ConfigurationProperties(prefix = "spring.datasource.secondary")
public DataSource secondaryDataSource() {

return primaryDataSourceProperties().initializeDataSourceBuilder().build();
}
}

至此，springboot 采用多数据源对JdbcTemplate进行配置完美解决，感谢大家对脚本之家的支持。

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