springboot-mybatis整合多数据源之sqlserver

╰半橙微兮° 2022-04-24 08:12 336阅读 0赞

**环境： intellij idea 2017.1.4 + spring boot 2.0**

### **代码文档结构图：** ###

**![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2h1d2VpMjAwMw_size_16_color_FFFFFF_t_70][]**

注：此代码中的db1,db2为mysql数据源相关，db3为sqlserver数据源

### 2 数据库配置相关类 ###

先在application.properties 文件中添加数据库的配置

#spring.datasource.driverClassName=com.mysql.jdbc.Driver
    #spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
    #spring.datasource.username=root
    #spring.datasource.password=
    #mybatis.mapper-locations: classpath:mapper/*.xml
    
    
    ## db1 database
    spring.datasource.db1.jdbc-url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
    spring.datasource.db1.username=root
    spring.datasource.db1.password=
    spring.datasource.db1.driver-class-name=com.mysql.jdbc.Driver
    ## db2 database
    spring.datasource.db2.jdbc-url=jdbc:mysql://localhost:3306/news?useUnicode=true&characterEncoding=UTF-8
    spring.datasource.db2.username=root
    spring.datasource.db2.password=
    spring.datasource.db2.driver-class-name=com.mysql.jdbc.Driver
    ## db3 database
    spring.datasource.db3.jdbc-url=jdbc:sqlserver://ip:port;DatabaseName=dbname
    spring.datasource.db3.username=dbaccountname
    spring.datasource.db3.password=dbaccountpassowrd
    spring.datasource.db3.driver-class-name=com.microsoft.sqlserver.jdbc.SQLServerDriver
    
    ## Redis数据库索引（默认为0）
    spring.redis.database=0  
    # Redis服务器地址
    spring.redis.host=127.0.0.1  
    # Redis服务器连接端口
    spring.redis.port=6379  
    # Redis服务器连接密码（默认为空）
    spring.redis.password=
    # 连接池最大连接数（使用负值表示没有限制）
    spring.redis.pool.max-active=200  
    # 连接池最大阻塞等待时间（使用负值表示没有限制）
    spring.redis.pool.max-wait=-1  
    # 连接池中的最大空闲连接
    spring.redis.pool.max-idle=10 
    # 连接池中的最小空闲连接
    spring.redis.pool.min-idle=0  
    # 连接超时时间（毫秒）
    spring.redis.timeout=3000

在datasouce目录下增加DataSourceConfig3文件,DataSourceConfig1,DataSourceConfig2略(资源代码里有),如下：

package com.neo.datasource;
    
    
    import org.apache.ibatis.session.SqlSessionFactory;
    import org.mybatis.spring.SqlSessionFactoryBean;
    import org.mybatis.spring.annotation.MapperScan;
    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.core.io.support.PathMatchingResourcePatternResolver;
    import org.springframework.core.io.support.ResourcePatternResolver;
    import org.springframework.jdbc.core.JdbcTemplate;
    import org.springframework.jdbc.datasource.DataSourceTransactionManager;
    import org.springframework.transaction.PlatformTransactionManager;
    
    import javax.sql.DataSource;
    
    @Configuration
    @MapperScan(basePackages = "com.neo.mapper.db3", sqlSessionFactoryRef = "db3SqlSessionTemplate")
    public class DataSourceConfig3 {
    
        @Bean(name = "sqlServerDataSource")
        @Qualifier("sqlServerDataSource")
        @ConfigurationProperties(prefix="spring.datasource.db3")
        public DataSource getMyDataSource(){
            return DataSourceBuilder.create().build();
        }
    
        @Bean(name = "secondaryJdbcTemplate")
        public JdbcTemplate secondaryJdbcTemplate(
                @Qualifier("sqlServerDataSource") DataSource dataSource) {
            return new JdbcTemplate(dataSource);
        }
    
        private static final String MAPPER_PATH = "classpath:mapper/db3/*.xml";
    
        private static final String ENTITY_PACKAGE = "com.neo.mapper.db3";
        @Bean(name = "db3SqlSessionTemplate")
        public SqlSessionFactory devSqlSessionFactory(
                @Qualifier("sqlServerDataSource") DataSource ddataSource)
                throws Exception {
            final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
            sessionFactory.setDataSource(ddataSource);
            ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
            sessionFactory.setMapperLocations(resolver.getResources(MAPPER_PATH));
            sessionFactory.setTypeAliasesPackage(ENTITY_PACKAGE);
            return sessionFactory.getObject();
        }
    
        @Bean
        public PlatformTransactionManager sqlServerTransactionManager(@Qualifier("sqlServerDataSource") DataSource sqlServerDataSource)
        {
            return new DataSourceTransactionManager(sqlServerDataSource);
        }
    
    }

### 实体表操作相关类文件 ###

**entity**

package com.neo.entity.db3;
    
    import org.springframework.stereotype.Component;
    
    
    @Component
    public class City {
        private int id;
    
        public int getId() {
            return id;
        }
    
        public void setId(int id) {
            this.id = id;
        }
    
        public String getName() {
            return Name;
        }
    
        public void setName(String name) {
            Name = name;
        }
    
        public int getParentId() {
            return ParentId;
        }
    
        public void setParentId(int parentId) {
            ParentId = parentId;
        }
    
        public int getSort() {
            return Sort;
        }
    
        public void setSort(int sort) {
            Sort = sort;
        }
    
        private String Name;
        private int ParentId;
        private  int Sort;
    
    
    }

resource/mapper/db3/city.xml

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://www.mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper namespace="com.neo.mapper.db3.CityMapper">
        <select id="getCity" resultType="com.neo.entity.db3.City">
            select * from T_City
            <where>
                <if test="name != null">
                    Name=#{name}
                </if>
    
                <if test="id!= null">
                    and id=#{id}
                </if>
            </where>
        </select>
        <delete id="deleteCity" parameterType="Integer">
            delete from T_City where id =#{id}
        </delete>
        <insert id="addCity" parameterType="com.neo.entity.db3.City">
        insert into T_City(Name,ParentId,Sort)values(#{Name},#{ParentId},#{Sort})
    </insert>
        <update id="updateCity" parameterType="com.neo.entity.db3.City">
            update T_City
            <set>
                <if test = "name != null">
                    city.name = #{name},
                </if>
            </set>
            where id = #{id}
        </update>
    </mapper>

mapper/db3/CityMapper

package com.neo.mapper.db3;
    
    import com.neo.entity.db3.City;
    import org.apache.ibatis.annotations.Mapper;
    
    import java.util.List;
    
    
    @Mapper
    public interface CityMapper {
        //获取列表
        public List<City> getCity() throws Exception;
        //根据id删除
        public void deleteCity(int id)throws Exception;
        //新增
        public void addCity(City city)throws Exception;
    
        //修改信息
        //public void updateCity(City city) throws Exception;
    
    }

**CityService:**

package com.neo.service;
    
    import com.neo.entity.db3.City;
    
    import java.util.List;
    
    
    public interface CityService {
        //显示所有用户
        public List<City> getCity()throws Exception;
        //根据id删除用户
        public void deleteCity(int id)throws Exception;
        //新增用户
        public void addCity(City city)throws Exception;
    }

package com.neo.service;
    
    import com.neo.entity.db3.City;
    import com.neo.mapper.db3.CityMapper;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import java.util.List;
    
    
    @Service
    public class CityServiceImpl implements CityService {
    
        @Autowired
        private CityMapper cityMapper;
        @Override
        public List<City> getCity() throws Exception {
            return cityMapper.getCity();
        }
        //根据id删除用户
        @Override
        public void deleteCity(int id) throws Exception {
            cityMapper.deleteCity(id);
        }
        //新增用户
        @Override
        public void addCity(City city) throws Exception {
            cityMapper.addCity(city);
        }
    }

**controller**

package com.neo.controller;
    
    import com.neo.entity.db3.City;
    import com.neo.service.CityService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import java.util.List;
    
    
    @RestController
    public class CityController {
    
        @Autowired
        private CityService cityService;
        @Autowired
        private City city;
        //显示用户
        @RequestMapping("city/list")
        public List<City> index() throws Exception {
            return cityService.getCity();
        }
    
        //增加用户
        @RequestMapping("city/add")
        public String addCity() throws Exception {
            city.setName("test省份");
            city.setParentId(0);
            city.setSort(0);
            cityService.addCity(city);
            return "增加";
        }
    }

**pom.xml如下：**

<?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.neo</groupId>
    	<artifactId>spring-boot-hello</artifactId>
    	<version>1.0</version>
    	<packaging>jar</packaging>
    
    	<name>spring-boot-hello</name>
    	<description>Demo project for Spring Boot</description>
    
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>2.0.0.RELEASE</version>
    	</parent>
    
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    		<java.version>1.8</java.version>
    	</properties>
    
    	<dependencies>
    	     <dependency>
    	        <groupId>org.springframework.boot</groupId>
    	        <artifactId>spring-boot-starter-web</artifactId>
    	    </dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-test</artifactId>
    			<scope>test</scope>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter</artifactId>
    		</dependency>
    
    		<dependency>
    			<groupId>org.mybatis.spring.boot</groupId>
    			<artifactId>mybatis-spring-boot-starter</artifactId>
    			<version>1.3.2</version>
    		</dependency>
    		<dependency>
    			<groupId>mysql</groupId>
    			<artifactId>mysql-connector-java</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>junit</groupId>
    			<artifactId>junit</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-data-redis</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>com.microsoft.sqlserver</groupId>
    			<artifactId>mssql-jdbc</artifactId>
    			<version>6.4.0.jre8</version>
    			<scope>runtime</scope>
    		</dependency>
    	</dependencies>
    	
    	<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    			</plugin>
    		</plugins>
    	</build>
    	
    
    </project>

至些所有的文件都ok了，编译运行

http://localhost:8080/city/list

http://localhost:8080/list

都正常显示，如果数据库表里没有数据，可以用add方法先添加。

附完整测试项目包地址： [https://download.csdn.net/download/huwei2003/11131140][https_download.csdn.net_download_huwei2003_11131140]

\--- end ---

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2h1d2VpMjAwMw_size_16_color_FFFFFF_t_70]: /images/20220217/c7ce5a6e905b4b398421abd4fcaf9e33.png
[https_download.csdn.net_download_huwei2003_11131140]: https://download.csdn.net/download/huwei2003/11131140