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，感谢大家对我们的支持。