MyBatis初级实战之四:druid多数据源

Stella981
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关于druid多数据源

本文是《MyBatis初级实战》系列的第四篇,一个springboot应用同时操作两个数据库的场景,在平时也会遇到,今天要实战的就是通过druid配置两个数据源,让一个springboot应用同时使用这两个数据源;

多数据源配置的基本思路

  1. 首先要明确的是:数据源是通过配置类实现的,因此要去掉springboot中和数据源相关的自动装配;

  2. 最核心的问题有两个,第一个是确定表和数据源的关系,这个关系是在SqlSessionFactory实例中确立的,代码如下所示:

    @Bean(name = "secondSqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("secondDataSource") DataSource dataSource) throws Exception {
    
    
    
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mappers/second/**/*Mapper.xml"));
        return bean.getObject();
    }
    
  3. 第二个核心问题是包扫描,即指定的mapper接口要使用指定的sqlSessionTemplat,这个关系在SqlSessionTemplate配置类中(相当于旧版的xml配置bean),如下图所示:
    MyBatis初级实战之四:druid多数据源

  4. 从上述代码可见,如果上层的业务代码想操作secondDataSource这个数据源的表,只要把对应的*Mapper.xml文件和Mapper接口文件对应的目录下即可;

  5. 整个配置的关键步骤如下图所示:
    MyBatis初级实战之四:druid多数据源

实战概览

本次实战的内容如下:

  1. 一共有两个数据库:mybatis和mybatis_second;
  2. mybatis中有名为user的表,mybatis_second中有名为address的表;
  3. 新建名为druidtwosource的springboot应用,里面有两个controller,可以分别对user、address这两个表进行操作;
  4. 编写单元测试用例,通过调用controller接口验证应用功能正常;
  5. 启动springboot应用,通过swagger验证功能正常;
  6. 进入druid监控页面;

源码下载

  1. 如果您不想编码,可以在GitHub下载所有源码,地址和链接信息如下表所示(https://github.com/zq2599/blog\_demos):

名称

链接

备注

项目主页

https://github.com/zq2599/blog\_demos

该项目在GitHub上的主页

git仓库地址(https)

https://github.com/zq2599/blog\_demos.git

该项目源码的仓库地址,https协议

git仓库地址(ssh)

git@github.com:zq2599/blog_demos.git

该项目源码的仓库地址,ssh协议

  1. 这个git项目中有多个文件夹,本章的应用在mybatis文件夹下,如下图红框所示:
    MyBatis初级实战之四:druid多数据源

创建数据库和表

  1. 创建名为mybatis的数据库,建表语句如下:

    DROP TABLE IF EXISTS user;

    CREATE TABLE user ( id int(32) NOT NULL AUTO_INCREMENT, name varchar(32) NOT NULL, age int(32) NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

  2. 创建名为mybatis_second的数据库,建表语句如下:

    DROP TABLE IF EXISTS address;

    CREATE TABLE address ( id int(32) NOT NULL AUTO_INCREMENT, city varchar(32) NOT NULL, street varchar(32) NOT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

编码

  1. 前文《MyBatis初级实战之一:Spring Boot集成》创建了父工程mybatis,本文继续在此工程中新增子工程,名为druidtwosource,先提前看整个子工程文件结构,如下图,要注意的是红框1中的mapper接口,以及红框2中的mapper映射文件,这两处都按照数据库的不同放入各自文件夹:
    MyBatis初级实战之四:druid多数据源

  2. druidtwosource工程的pom.xml内容如下:

    4.0.0 com.bolingcavalry mybatis 1.0-SNAPSHOT ../pom.xml com.bolingcavalry druidtwosource 0.0.1-SNAPSHOT druidtwosource Demo project for Mybatis Druid (two datasource) in Spring Boot <java.version>1.8</java.version> org.springframework.boot spring-boot-starter-web org.mybatis.spring.boot mybatis-spring-boot-starter mysql mysql-connector-java runtime org.springframework.boot spring-boot-starter-test test org.junit.vintage junit-vintage-engine io.springfox springfox-swagger2 io.springfox springfox-swagger-ui com.alibaba druid-spring-boot-starter junit junit test com.google.code.gson gson org.springframework.boot spring-boot-maven-plugin

  3. 配置文件application.yml,可见这里面有first和second两个数据源配置,而druid的web-stat-filter和stat-view-servlet这两个配置是公用的:

    server: port: 8080

    spring: #1.JDBC数据源 datasource: druid: first: username: root password: 123456 url: jdbc:mysql://192.168.50.43:3306/mybatis?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC driver-class-name: com.mysql.cj.jdbc.Driver #初始化连接池的连接数量 大小,最小,最大 initial-size: 5 min-idle: 5 max-active: 20 #配置获取连接等待超时的时间 max-wait: 60000 #配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 time-between-eviction-runs-millis: 60000 # 配置一个连接在池中最小生存的时间,单位是毫秒 min-evictable-idle-time-millis: 30000 # 配置一个连接在池中最大生存的时间,单位是毫秒 max-evictable-idle-time-millis: 300000 validation-query: SELECT 1 FROM user test-while-idle: true test-on-borrow: true test-on-return: false # 是否缓存preparedStatement,也就是PSCache 官方建议MySQL下建议关闭 个人建议如果想用SQL防火墙 建议打开 pool-prepared-statements: true max-pool-prepared-statement-per-connection-size: 20 # 配置监控统计拦截的filters,去掉后监控界面sql无法统计,'wall'用于防火墙 filters: stat,wall,slf4j filter: stat: merge-sql: true slow-sql-millis: 5000 second: username: root password: 123456 url: jdbc:mysql://192.168.50.43:3306/mybatis_second?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC driver-class-name: com.mysql.cj.jdbc.Driver #初始化连接池的连接数量 大小,最小,最大 initial-size: 5 min-idle: 5 max-active: 20 #配置获取连接等待超时的时间 max-wait: 60000 #配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 time-between-eviction-runs-millis: 60000 # 配置一个连接在池中最小生存的时间,单位是毫秒 min-evictable-idle-time-millis: 30000 # 配置一个连接在池中最大生存的时间,单位是毫秒 max-evictable-idle-time-millis: 300000 validation-query: SELECT 1 FROM user test-while-idle: true test-on-borrow: true test-on-return: false # 是否缓存preparedStatement,也就是PSCache 官方建议MySQL下建议关闭 个人建议如果想用SQL防火墙 建议打开 pool-prepared-statements: true max-pool-prepared-statement-per-connection-size: 20 # 配置监控统计拦截的filters,去掉后监控界面sql无法统计,'wall'用于防火墙 filters: stat,wall,slf4j filter: stat: merge-sql: true### slow-sql-millis: 5000 #3.基础监控配置 web-stat-filter: enabled: true url-pattern: /* #设置不统计哪些URL exclusions: ".js,.gif,.jpg,.png,.css,.ico,/druid/" session-stat-enable: true session-stat-max-count: 100 stat-view-servlet: enabled: true url-pattern: /druid/ reset-enable: true #设置监控页面的登录名和密码 login-username: admin login-password: admin allow: 127.0.0.1 #deny: 192.168.1.100

    日志配置

    logging: level: root: INFO com: bolingcavalry: druidtwosource: mapper: debug

  4. user的映射配置,请注意文件位置:

    <!--新增单条记录-->
    <insert id="insertWithFields" useGeneratedKeys="true" keyProperty="id">
        insert into user (id, name, age) values (#{id}, #{name}, #{age})
    </insert>
    
    <!--按照名称查找-->
    <select id="findByName" parameterType="String" resultType="com.bolingcavalry.druidtwosource.entity.User">
        select id, name, age from user where name like concat('%', #{name}, '%')
    </select>
    
    <!--删除指定数据-->
    <delete id="delete">
        delete from user where id= #{id}
    </delete>
    
  5. address的映射配置:

    <!--新增单条记录-->
    <insert id="insertWithFields" useGeneratedKeys="true" keyProperty="id">
        insert into address (id, city, street) values (#{id}, #{city}, #{street})
    </insert>
    
    <!--按照名称查找-->
    <select id="findByCityName" parameterType="String" resultType="com.bolingcavalry.druidtwosource.entity.Address">
        select id, city, street from address where city like concat('%', #{cityname}, '%')
    </select>
    
    <!--删除指定数据-->
    <delete id="delete">
        delete from address where id= #{id}
    </delete>
    
  6. user表的实体类,注意swagger用到的注解:

    package com.bolingcavalry.druidtwosource.entity;

    import io.swagger.annotations.ApiModel; import io.swagger.annotations.ApiModelProperty;

    @ApiModel(description = "用户实体类") public class User {

    @ApiModelProperty(value = "用户ID")
    private Integer id;
    
    @ApiModelProperty(value = "用户名", required = true)
    private String name;
    
    @ApiModelProperty(value = "用户地址", required = false)
    private Integer age;
    
    @Override
    public String toString() {
    
    
    
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
    ...省略get和set方法
    

    }

  7. address表的实体类:

    package com.bolingcavalry.druidtwosource.entity;

    import io.swagger.annotations.ApiModel; import io.swagger.annotations.ApiModelProperty;

    @ApiModel(description = "地址实体类") public class Address {

    @ApiModelProperty(value = "地址ID")
    private Integer id;
    
    @ApiModelProperty(value = "城市名", required = true)
    private String city;
    
    @ApiModelProperty(value = "街道名", required = true)
    private String street;
    
    @Override
    public String toString() {
    
    
    
        return "Address{" +
                "id=" + id +
                ", city='" + city + '\'' +
                ", street='" + street + '\'' +
                '}';
    }
    ...省略get和set方法
    

    }

  8. 启动类DuridTwoSourceApplication.java,要注意的是排除掉数据源和事务的自动装配,因为后面会手动编码执行这些配置:

    package com.bolingcavalry.druidtwosource;

    import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; import org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration;

    @SpringBootApplication(exclude={

        DataSourceAutoConfiguration.class,
        DataSourceTransactionManagerAutoConfiguration.class,
    

    }) public class DuridTwoSourceApplication {

    public static void main(String[] args) {
    
    
    
        SpringApplication.run(DuridTwoSourceApplication.class, args);
    }
    

    }

  9. swagger配置:

    package com.bolingcavalry.druidtwosource;

    import springfox.documentation.service.Contact; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import springfox.documentation.builders.ApiInfoBuilder; import springfox.documentation.builders.PathSelectors; import springfox.documentation.builders.RequestHandlerSelectors; import springfox.documentation.service.ApiInfo; import springfox.documentation.service.Tag; import springfox.documentation.spi.DocumentationType; import springfox.documentation.spring.web.plugins.Docket; import springfox.documentation.swagger2.annotations.EnableSwagger2;

    /**

    • @Description: swagger配置类
    • @author: willzhao E-mail: zq2599@gmail.com
    • @date: 2020/8/11 7:54

    */ @Configuration @EnableSwagger2 public class SwaggerConfig {

    @Bean
    public Docket createRestApi() {
    
    
    
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .tags(new Tag("UserController", "用户服务"),
                        new Tag("AddressController", "地址服务"))
                .select()
                // 当前包路径
                .apis(RequestHandlerSelectors.basePackage("com.bolingcavalry.druidtwosource.controller"))
                .paths(PathSelectors.any())
                .build();
    }
    
    //构建 api文档的详细信息函数,注意这里的注解引用的是哪个
    private ApiInfo apiInfo() {
    
    
    
        return new ApiInfoBuilder()
                //页面标题
                .title("MyBatis CURD操作")
                //创建人
                .contact(new Contact("程序员欣宸", "https://github.com/zq2599/blog_demos", "zq2599@gmail.com"))
                //版本号
                .version("1.0")
                //描述
                .description("API 描述")
                .build();
    }
    

    }

  10. 数据源配置TwoDataSourceConfig.java,可见是通过ConfigurationProperties注解来确定配置信息,另外不要忘记在默认数据源上添加Primary注解:

    package com.bolingcavalry.druidtwosource;

    import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder; 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 javax.sql.DataSource;

    /**

    • @Description: druid配置类
    • @author: willzhao E-mail: zq2599@gmail.com
    • @date: 2020/8/18 08:12

    */ @Configuration public class TwoDataSourceConfig {

    @Primary
    @Bean(name = "firstDataSource")
    @ConfigurationProperties("spring.datasource.druid.first")
    public DataSource first() {
    
    
    
        return DruidDataSourceBuilder.create().build();
    }
    
    @Bean(name = "secondDataSource")
    @ConfigurationProperties("spring.datasource.druid.second")
    public DataSource second() {
    
    
    
        return DruidDataSourceBuilder.create().build();
    }
    

    }

  11. 第一个数据源的mybatis配置类DruidConfigFirst.java,可以结合本篇的第一幅图来看,注意MapperScan注解的两个属性basePackages和sqlSessionTemplateRef是关键,它们最终决定了哪些mapper接口使用哪个数据源,另外注意要带上Primary注解:

    package com.bolingcavalry.druidtwosource;

    import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.SqlSessionTemplate; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Primary; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.jdbc.datasource.DataSourceTransactionManager;

    import javax.sql.DataSource;

    /**

    • @Description: druid配置类
    • @author: willzhao E-mail: zq2599@gmail.com
    • @date: 2020/8/18 08:12

    */ @Configuration @MapperScan(basePackages = "com.bolingcavalry.druidtwosource.mapper.first", sqlSessionTemplateRef = "firstSqlSessionTemplate") public class DruidConfigFirst {

    @Bean(name = "firstSqlSessionFactory")
    @Primary
    public SqlSessionFactory sqlSessionFactory(@Qualifier("firstDataSource") DataSource dataSource) throws Exception {
    
    
    
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mappers/first/**/*Mapper.xml"));
        return bean.getObject();
    }
    
    @Bean(name = "firstTransactionManager")
    @Primary
    public DataSourceTransactionManager transactionManager(@Qualifier("firstDataSource") DataSource dataSource) {
    
    
    
        return new DataSourceTransactionManager(dataSource);
    }
    
    @Bean(name = "firstSqlSessionTemplate")
    @Primary
    public SqlSessionTemplate sqlSessionTemplate(@Qualifier("firstSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
    
    
    
        return new SqlSessionTemplate(sqlSessionFactory);
    }
    

    }

  12. 第二个数据源的mybatis配置DruidConfigSecond.java,注意不要带Primary注解:

package com.bolingcavalry.druidtwosource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

/**
 * @Description: druid配置类
 * @author: willzhao E-mail: zq2599@gmail.com
 * @date: 2020/8/18 08:12
 */
@Configuration
@MapperScan(basePackages = "com.bolingcavalry.druidtwosource.mapper.second", sqlSessionTemplateRef  = "secondSqlSessionTemplate")
public class DruidConfigSecond {
   
   
   

    @Bean(name = "secondSqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("secondDataSource") DataSource dataSource) throws Exception {
   
   
   
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mappers/second/**/*Mapper.xml"));
        return bean.getObject();
    }

    @Bean(name = "secondTransactionManager")
    public DataSourceTransactionManager transactionManager(@Qualifier("secondDataSource") DataSource dataSource) {
   
   
   
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "secondSqlSessionTemplate")
    public SqlSessionTemplate sqlSessionTemplate(@Qualifier("secondSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
   
   
   
        return new SqlSessionTemplate(sqlSessionFactory);
    }

}
  1. user表的mapper接口类很简单,只有三个接口,注意package位置:
package com.bolingcavalry.druidtwosource.mapper.first;

import com.bolingcavalry.druidtwosource.entity.User;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface UserMapper {
   
   
   

    int insertWithFields(User user);

    List<User> findByName(String name);

    int delete(int id);
}
  1. address表的Mapper接口类:
package com.bolingcavalry.druidtwosource.mapper.second;

import com.bolingcavalry.druidtwosource.entity.Address;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * @Description: 地址实体的接口类
 * @author: willzhao E-mail: zq2599@gmail.com
 * @date: 2020/8/4 8:32
 */

@Repository
public interface AddressMapper {
   
   
   

    int insertWithFields(Address address);

    List<Address> findByCityName(String cityName);

    int delete(int id);

}
  1. user表的service类:
package com.bolingcavalry.druidtwosource.service;

import com.bolingcavalry.druidtwosource.entity.User;
import com.bolingcavalry.druidtwosource.mapper.first.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;

public class UserService {
   
   
   
    @Autowired
    UserMapper userMapper;

    public User insertWithFields(User user) {
   
   
   
        userMapper.insertWithFields(user);
        return user;
    }

    public List<User> findByName(String name) {
   
   
   
        return userMapper.findByName(name);
    }

    public int delete(int id) {
   
   
   
        return userMapper.delete(id);
    }

}
  1. address表的service类:
package com.bolingcavalry.druidtwosource.service;

import com.bolingcavalry.druidtwosource.entity.Address;
import com.bolingcavalry.druidtwosource.entity.User;
import com.bolingcavalry.druidtwosource.mapper.first.UserMapper;
import com.bolingcavalry.druidtwosource.mapper.second.AddressMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;

@Service
public class AddressService {
   
   
   

    @Autowired
    AddressMapper addressMapper;

    public Address insertWithFields(Address address) {
   
   
   
        addressMapper.insertWithFields(address);
        return address;
    }

    public List<Address> findByCityName(String cityName) {
   
   
   
        return addressMapper.findByCityName(cityName);
    }

    public int delete(int id) {
   
   
   
        return addressMapper.delete(id);
    }

}
  1. user表的controller:
package com.bolingcavalry.druidtwosource.controller;

import com.bolingcavalry.druidtwosource.entity.User;
import com.bolingcavalry.druidtwosource.service.UserService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;

@RestController
@RequestMapping("/user")
@Api(tags = {
   
   
   "UserController"})
public class UserController {
   
   
   

    @Autowired
    private UserService userService;

    @ApiOperation(value = "新增user记录", notes="新增user记录")
    @RequestMapping(value = "/insertwithfields",method = RequestMethod.PUT)
    public User create(@RequestBody User user) {
   
   
   
        return userService.insertWithFields(user);
    }

    @ApiOperation(value = "删除指定ID的user记录", notes="删除指定ID的user记录")
    @ApiImplicitParam(name = "id", value = "用户ID", paramType = "path", required = true, dataType = "Integer")
    @RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
    public int delete(@PathVariable int id){
   
   
   
        return userService.delete(id);
    }

    @ApiOperation(value = "根据名称模糊查找所有user记录", notes="根据名称模糊查找所有user记录")
    @ApiImplicitParam(name = "name", value = "用户名", paramType = "path", required = true, dataType = "String")
    @RequestMapping(value = "/findbyname/{name}", method = RequestMethod.GET)
    public List<User> findByName(@PathVariable("name") String name){
   
   
   
        return userService.findByName(name);
    }
}
  1. address表的controller:
package com.bolingcavalry.druidtwosource.controller;

import com.bolingcavalry.druidtwosource.entity.Address;
import com.bolingcavalry.druidtwosource.service.AddressService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * @Description: user表操作的web接口
 * @author: willzhao E-mail: zq2599@gmail.com
 * @date: 2020/8/4 8:31
 */
@RestController
@RequestMapping("/address")
@Api(tags = {
   
   
   "AddressController"})
public class AddressController {
   
   
   

    @Autowired
    private AddressService addressService;


    @ApiOperation(value = "新增address记录", notes="新增address记录")
    @RequestMapping(value = "/insertwithfields",method = RequestMethod.PUT)
    public Address create(@RequestBody Address address) {
   
   
   
        return addressService.insertWithFields(address);
    }

    @ApiOperation(value = "删除指定ID的address记录", notes="删除指定ID的address记录")
    @ApiImplicitParam(name = "id", value = "地址ID", paramType = "path", required = true, dataType = "Integer")
    @RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
    public int delete(@PathVariable int id){
   
   
   
        return addressService.delete(id);
    }

    @ApiOperation(value = "根据城市名模糊查找所address记录", notes="根据城市名模糊查找所address记录")
    @ApiImplicitParam(name = "name", value = "城市名", paramType = "path", required = true, dataType = "String")
    @RequestMapping(value = "/findbycityname/{cityname}", method = RequestMethod.GET)
    public List<Address> findByName(@PathVariable("cityname") String cityName){
   
   
   
        return addressService.findByCityName(cityName);
    }
}
  • 至此,编码完成,接下来编写单元测试代码;

单元测试

  1. 新增配置文件application-test.yml,其内容仅有下图红框位置与application.yml不同,其他的全部一致:
    MyBatis初级实战之四:druid多数据源

  2. user表的测试用例如下:

    package com.bolingcavalry.druidtwosource.controller;

    import com.bolingcavalry.druidtwosource.entity.User; import com.google.gson.Gson; import com.google.gson.JsonArray; import com.google.gson.JsonParser; import org.junit.jupiter.api.*; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.http.MediaType; import org.springframework.test.context.ActiveProfiles; import org.springframework.test.context.junit4.SpringRunner; import org.springframework.test.web.servlet.MockMvc; import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;

    import java.util.UUID;

    import static org.hamcrest.Matchers.hasSize; import static org.hamcrest.Matchers.is; import static org.hamcrest.core.IsEqual.equalTo; import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print; import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;

    /**

    • @Description: 单元测试类
    • @author: willzhao E-mail: zq2599@gmail.com
    • @date: 2020/8/9 23:55

    */ @RunWith(SpringRunner.class) @SpringBootTest @AutoConfigureMockMvc @TestMethodOrder(MethodOrderer.OrderAnnotation.class) @ActiveProfiles("test") class UserControllerTest {

    @Autowired
    private MockMvc mvc;
    
    // user表的name字段,这里为了保证测试时新增和删除的记录是同一条,用UUID作为用户名
    static String testName;
    
    @BeforeAll
    static void init() {
    
    
    
        testName = UUID.randomUUID().toString().replaceAll("-","");
    }
    
    @Test
    @Order(1)
    void insertWithFields() throws Exception {
    
    
    
        String jsonStr = "{\"name\": \"" + testName + "\", \"age\": 10}";
    
        mvc.perform(
                MockMvcRequestBuilders.put("/user/insertwithfields")
                        .contentType(MediaType.APPLICATION_JSON)
                        .content(jsonStr)
                        .accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$.name", is(testName)))
                .andDo(print())
                .andReturn()
                .getResponse()
                .getContentAsString();
    }
    
    @Test
    @Order(2)
    void findByName() throws Exception {
    
    
    
        mvc.perform(MockMvcRequestBuilders.get("/user/findbyname/"+ testName).accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$", hasSize(1)))
                .andDo(print());
    }
    
    
    @Test
    @Order(3)
    void delete() throws Exception {
    
    
    
        // 先根据名称查出记录
        String responseString = mvc.perform(MockMvcRequestBuilders.get("/user/findbyname/"+ testName).accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$", hasSize(1)))
                .andDo(print())
                .andReturn()
                .getResponse()
                .getContentAsString();
    
        // 反序列化得到数组
        JsonArray jsonArray = JsonParser.parseString(responseString).getAsJsonArray();
    
        // 反序列化得到user实例
        User user = new Gson().fromJson(jsonArray.get(0), User.class);
    
        // 执行删除
        mvc.perform(MockMvcRequestBuilders.delete("/user/"+ user.getId()).accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(content().string(equalTo("1")))
                .andDo(print());
    }
    

    }

  3. address表的单元测试如下:

    package com.bolingcavalry.druidtwosource.controller;

    import com.bolingcavalry.druidtwosource.entity.Address; import com.google.gson.Gson; import com.google.gson.JsonArray; import com.google.gson.JsonParser; import org.junit.jupiter.api.*; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.http.MediaType; import org.springframework.test.context.ActiveProfiles; import org.springframework.test.context.junit4.SpringRunner; import org.springframework.test.web.servlet.MockMvc; import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;

    import java.util.UUID;

    import static org.hamcrest.Matchers.hasSize; import static org.hamcrest.Matchers.is; import static org.hamcrest.core.IsEqual.equalTo; import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print; import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;

    @RunWith(SpringRunner.class) @SpringBootTest @AutoConfigureMockMvc @TestMethodOrder(MethodOrderer.OrderAnnotation.class) @ActiveProfiles("test") class AddrestControllerTest {

    @Autowired
    private MockMvc mvc;
    
    // address表的cityName字段,这里为了保证测试时新增和删除的记录是同一条,用UUID作为用户名
    static String testCityName;
    
    @BeforeAll
    static void init() {
    
    
    
        testCityName = UUID.randomUUID().toString().replaceAll("-","");
    }
    
    @Test
    @Order(1)
    void insertWithFields() throws Exception {
    
    
    
        String jsonStr = "{\"city\": \"" + testCityName + "\", \"street\": \"streetName\"}";
    
        mvc.perform(
                MockMvcRequestBuilders.put("/address/insertwithfields")
                        .contentType(MediaType.APPLICATION_JSON)
                        .content(jsonStr)
                        .accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$.city", is(testCityName)))
                .andDo(print())
                .andReturn()
                .getResponse()
                .getContentAsString();
    }
    
    @Test
    @Order(2)
    void findByName() throws Exception {
    
    
    
        mvc.perform(MockMvcRequestBuilders.get("/address/findbycityname/"+ testCityName).accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$", hasSize(1)))
                .andDo(print());
    }
    
    
    @Test
    @Order(3)
    void delete() throws Exception {
    
    
    
        // 先根据名称查出记录
        String responseString = mvc.perform(MockMvcRequestBuilders.get("/address/findbycityname/"+ testCityName).accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$", hasSize(1)))
                .andDo(print())
                .andReturn()
                .getResponse()
                .getContentAsString();
    
        // 反序列化得到数组
        JsonArray jsonArray = JsonParser.parseString(responseString).getAsJsonArray();
    
        // 反序列化得到user实例
        Address address = new Gson().fromJson(jsonArray.get(0), Address.class);
    
        // 执行删除
        mvc.perform(MockMvcRequestBuilders.delete("/address/"+ address.getId()).accept(MediaType.APPLICATION_JSON))
                .andExpect(status().isOk())
                .andExpect(content().string(equalTo("1")))
                .andDo(print());
    }
    

    }

  • 至此,编码完成,而可以开始验证了;

验证,单元测试

  1. user表对应的单元测试操作如下图,三个测试方法先后新增记录,查询记录,然后删除掉:
    MyBatis初级实战之四:druid多数据源
  2. AddrestControllerTest也按照上图做同样的操作;

验证,swagger

  1. 浏览器访问:http://localhost:8080/swagger-ui.html ,会展示swagger页面如下:
    MyBatis初级实战之四:druid多数据源
  2. 先来试试新增操作:
    MyBatis初级实战之四:druid多数据源
  3. 返回数据如下图:
    MyBatis初级实战之四:druid多数据源
  4. 以下是用MySQL数据库客户端工具查看到的mybatis.user表的数据,可见服务功能正常:
    MyBatis初级实战之四:druid多数据源
  5. 其他接口请自行操作验证;

进入druid监控页面

  1. druid监控页面地址是:http://localhost:8080/druid , 账号密码都是admin:
    MyBatis初级实战之四:druid多数据源
  2. 登录后可见数据库操作:
    MyBatis初级实战之四:druid多数据源
  3. 在数据源页面可以见到两个数据源,如下图:
    MyBatis初级实战之四:druid多数据源
    MyBatis初级实战之四:druid多数据源
  • 以上就是完整的springboot+mybatis+druid多数据源开发和验证过程,希望能给您一些参考;

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MyBatis初级实战之四:druid多数据源

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