配置POM檔案

<?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>

    <groupId>com.adagio</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>multiple-data-sources</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.8.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>
 

• oralce資料庫驅動包

<dependency>
    <groupId>com.oracle</groupId>
    <artifactId>ojdbc14</artifactId>
    <version>10.2.0.4.0</version>
</dependency>

• 因為在maven倉庫下載不到，就直接下載lib手動匯入本地maven倉庫

配置檔案

spring.datasource.primary.url=jdbc:oracle:thin:@127.0.0.1:1521:orcl
spring.datasource.primary.username=root
spring.datasource.primary.password=root
spring.datasource.primary.driver-class-name=oracle.jdbc.OracleDriver

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

資料來源配置類

package com.adagio.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);
    }


}
 

測試類

package com.adagio.web;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.PreparedStatementCallback;
import org.springframework.jdbc.core.PreparedStatementCreator;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class CxzdbController {
    @Autowired
    @Qualifier("primaryJdbcTemplate")
    protected JdbcTemplate jdbcTemplate1;

    @Autowired
    @Qualifier("secondaryJdbcTemplate")
    protected JdbcTemplate jdbcTemplate2;
    
//    @Autowired
//    protected JdbcTemplate jdbcTemplate;


    @RequestMapping("/test")
    public List<Map<String, Object>> getCxzdb(){
//        String sql = "SELECT * FROM sys_user";
        
        String sql = "SELECT * FROM USER";
        
        List<Map<String, Object>> resObj = (List<Map<String, Object>>) jdbcTemplate1.execute(new PreparedStatementCreator() {
            
            @Override
            public PreparedStatement createPreparedStatement(Connection con) throws SQLException {
                return con.prepareStatement(sql);
            }
        }, new PreparedStatementCallback<List<Map<String, Object>>>() {

            @Override
            public List<Map<String, Object>> doInPreparedStatement(PreparedStatement ps) throws SQLException, DataAccessException {
                ps.execute();   
                ResultSet rs = ps.getResultSet();   
                while(rs.next()){
                    System.out.println("==" + rs.getString(1));
                    System.out.println("==" + rs.getString(2));
                    System.out.println("==" + rs.getString(3));
                    System.out.println("==" + rs.getString(4));
                    System.out.println("==" + rs.getString(5));
                    
//                    Map<String, Object> map = new HashMap<>();
//                    map.put("id", rs.getString("id"));
                    
                }
                return null;
            }
            
        } );
        return resObj;
    }
}

• 啟動之後訪問：http://localhost:8080/test
• 看後臺有列印結果表示配置成功