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使用springboot + druid + mybatisplus完成多数据源配置

一. 简介

　1. 版本

springboot版本为2.0.3.RELEASE，mybatisplus版本为2.1.9， druid版本为1.1.9，swagger版本为2.7.0

　 2. 项目地址

　 https://gitee.com/wbsxch/ssm.git

　3. 留个记录，方便查找

　　　　开发步骤：

　　　　1. 新建springboot项目。

　　　　2. 导入依赖 --> devtools，lombok，web，thymeleaf，mysql，aop，mybatisplus，druid，swagger。

　　　　3. maven多环境配置。

　　　　4. 编写application.yml --> 项目端口，项目路径名，mybatisplus配置，mysql多数据源配置。

　　　　5. 新建DataSourceContextHolder 用于设置，获取，清空当前线程内的数据源变量。

　　　　6. 新建 MultipleDataSource 实现 AbstractRoutingDataSource 类。重写determineCurrentLookupKey()，通过

　　　　　 DataSourceContextHolder 获取数据源变量，用于当作lookupKey取出指定的数据源。

　　　　7. 新建DataSourceEnum 用于存放数据源名称。

　　　　8. 新建注解 DataSource，用于aop类中当作切入点来选择数据源。

　　　　　编写aop类 --> DataSourceAspect.java

　　　　9. 新建并配置DruidConfiguration，MybatisplusConfiguration，SwaggerConfiguration 三个类。

　　　　DruidConfiguration --> StatViewServlet 和 WebStatFilter Druid监控配置和监控过滤器。

　　　　MybatisplusConfiguration --> mybatisplus 分页插件，SQL执行效率插件

　　　　　　　　　　　　　　　　　　　数据源Bean，MultipleDataSource 注入

　　　　　　　　　　　　　　　　　　　 SqlSessionFactory注入

　　　　SwaggerConfiguration --> 常规配置。

　　　　10. crud Controller接口。

　　　　11. 完整项目结构

二. 详细步骤

　　1. 新建springboot项目

　　　　idea新建Empty项目然后创建springboot项目勾选 devtools，lombok，web，thymeleaf，mysql

　　2. 导入依赖

　　　　pom.xml

<?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.seawaterbt</groupId>
    <artifactId>ssm</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>ssm</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.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>
        <druid.version>1.1.9</druid.version>
        <swagger.version>2.7.0</swagger.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-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>2.1.9</version>
        </dependency>

        <!-- druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>${druid.version}</version>
        </dependency>

        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>${swagger.version}</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>${swagger.version}</version>
        </dependency>

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

    <profiles>
        <profile>
            <id>prod</id>
            <properties>
                <config.dir>prod</config.dir>
            </properties>
        </profile>
        <profile>
            <id>dev</id>
            <properties>
                <config.dir>dev</config.dir>
            </properties>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
        </profile>
        <profile>
            <id>qa</id>
            <properties>
                <config.dir>qa</config.dir>
            </properties>
        </profile>
    </profiles>

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

        <resources>
            <resource>
                <filtering>true</filtering>
                <directory>src/main/resources/config/${config.dir}</directory>
                <includes>
                    <include>*.*</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources/</directory>
            </resource>
        </resources>
    </build>


</project>

pom.xml

　　3. Maven多环境配置看pom文件

　　4. 编写application.yml

　　　　application.yml

server:
  port: 8080
  servlet:
    context-path: /ssm
spring:
  datasource:
      druid:
          db1:
              username: root
              password: 123456
              driver-class-name: com.mysql.jdbc.Driver
              url: jdbc:mysql:///mds
              initialSize: 5
              minIdle: 5
              maxActive: 20
          db2:
              username: root
              password: 123456
              driver-class-name: com.mysql.jdbc.Driver
              url: jdbc:mysql:///ssj
              initialSize: 5
              minIdle: 5
              maxActive: 20
mybatis-plus:
  # 如果是放在src/main/java目录下 classpath:/com/yourpackage/*/mapper/*Mapper.xml
  # 如果是放在resource目录 classpath:/mapper/*Mapper.xml
  mapper-locations: classpath:/mapper/*Mapper.xml
  #实体扫描，多个package用逗号或者分号分隔
  typeAliasesPackage: com.seawatebt.ssm.entity
  global-config:
    #主键类型  0:"数据库ID自增", 1:"用户输入ID",2:"全局唯一ID (数字类型唯一ID)", 3:"全局唯一ID UUID";
    id-type: 0
    #字段策略 0:"忽略判断",1:"非 NULL 判断"),2:"非空判断"
    field-strategy: 2
    #驼峰下划线转换
    db-column-underline: true
    #mp2.3+ 全局表前缀 mp_
    #table-prefix: mp_
    #刷新mapper 调试神器
    refresh-mapper: true
    #数据库大写下划线转换
    #capital-mode: true
    #逻辑删除配置（下面3个配置）
    logic-delete-value: 4
    logic-not-delete-value: 0
  configuration:
    #配置返回数据库(column下划线命名&&返回java实体是驼峰命名)，自动匹配无需as（没开启这个，SQL需要写as： select user_id as userId）
    map-underscore-to-camel-case: true
    cache-enabled: false
    #配置JdbcTypeForNull, oracle数据库必须配置
    jdbc-type-for-null: 'null'

application.yml

　　5. 新建DataSourceContextHolder

　　　　DataSourceContextHolder.java

package com.seawaterbt.ssm.multiple;

public class DataSourceContextHolder {

    private static final ThreadLocal<String> contextHolder = new InheritableThreadLocal<>();

    /**
     *  设置数据源
     * @param db
     */
    public static void setDataSource(String db){
        contextHolder.set(db);
    }

    /**
     * 取得当前数据源
     * @return
     */
    public static String getDataSource(){
        return contextHolder.get();
    }

    /**
     * 清除上下文数据
     */
    public static void clear(){
        contextHolder.remove();
    }
}

DataSourceContextHolder.java

　　6. 新建 MultipleDataSource

　　　　MultipleDataSource.java

package com.seawaterbt.ssm.multiple;

import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;

public class MultipleDataSource extends AbstractRoutingDataSource {

    @Override
    protected Object determineCurrentLookupKey() {
        return DataSourceContextHolder.getDataSource();
    }
}

MultipleDataSource.java

　　7. 新建DataSourceEnum

　　　　DataSourceEnum.java

package com.seawaterbt.ssm.enums;

public enum DataSourceEnum {

    DB1("db1"),DB2("db2");

    private String value;

    DataSourceEnum(String value){this.value=value;}

    public String getValue() {
        return value;
    }
}

DataSourceEnum.java

　　8. 新建注解 DataSource

　　　　DataSource.java

package com.seawaterbt.ssm.annotation;

import com.seawaterbt.ssm.enums.DataSourceEnum;

import java.lang.annotation.*;

@Target({ElementType.METHOD,ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface DataSource {

    DataSourceEnum value() default DataSourceEnum.DB1;
}

DataSource.java

　　　　DataSourceAspect.java

@Component
@Slf4j
@Aspect
@Order(-1)
public class DataSourceAspect {

    @Pointcut("@within(com.seawaterbt.ssm.annotation.DataSource) || @annotation(com.seawaterbt.ssm.annotation.DataSource)")
    public void pointCut(){

    }

    @Before("pointCut() && @annotation(dataSource)")
    public void doBefore(DataSource dataSource){
        log.info("选择数据源---"+dataSource.value().getValue());
        DataSourceContextHolder.setDataSource(dataSource.value().getValue());
    }

    @After("pointCut()")
    public void doAfter(){
        DataSourceContextHolder.clear();
    }
}

　　9. 新建并配置DruidConfiguration，MybatisplusConfiguration，SwaggerConfiguration

　　　　DruidConfiguration.java

package com.seawaterbt.ssm.config;

import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;


@Configuration
public class DruidConfiguration {

    @Bean
    public ServletRegistrationBean startViewServlet(){
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
        // IP白名单
        servletRegistrationBean.addInitParameter("allow","127.0.0.1");
        // IP黑名单(共同存在时，deny优先于allow)
        servletRegistrationBean.addInitParameter("deny","127.0.0.1");
        //控制台管理用户
        servletRegistrationBean.addInitParameter("loginUsername","admin");
        servletRegistrationBean.addInitParameter("loginPassword","123456");
        //是否能够重置数据
        servletRegistrationBean.addInitParameter("resetEnable","false");
        return servletRegistrationBean;
    }

    @Bean
    public FilterRegistrationBean statFilter(){
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
        //添加过滤规则
        filterRegistrationBean.addUrlPatterns("/*");
        //忽略过滤的格式
        filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }
}

DruidConfiguration.java

　　　　MyBatiesPlusConfiguration.java

package com.seawaterbt.ssm.config;

import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
import com.baomidou.mybatisplus.MybatisConfiguration;
import com.baomidou.mybatisplus.entity.GlobalConfiguration;
import com.baomidou.mybatisplus.mapper.LogicSqlInjector;
import com.baomidou.mybatisplus.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.plugins.PerformanceInterceptor;
import com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean;
import com.seawaterbt.ssm.enums.DataSourceEnum;
import com.seawaterbt.ssm.multiple.MultipleDataSource;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.type.JdbcType;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
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.context.annotation.Profile;

import javax.sql.DataSource;
import java.util.HashMap;
import java.util.Map;

@Configuration
@MapperScan("com.seawaterbt.ssm.mapper*")
public class MyBatiesPlusConfiguration {

    /*
     * 分页插件，自动识别数据库类型
     * 多租户，请参考官网【插件扩展】
     */
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
        // 开启 PageHelper 的支持
        paginationInterceptor.setLocalPage(true);
        return paginationInterceptor;
    }

    /**
     * SQL执行效率插件
     */
    @Bean
    @Profile({"dev","qa"})// 设置 dev test 环境开启
    public PerformanceInterceptor performanceInterceptor() {
        PerformanceInterceptor performanceInterceptor = new PerformanceInterceptor();
        performanceInterceptor.setMaxTime(1000);
        performanceInterceptor.setFormat(true);
        return performanceInterceptor;
    }

    @Bean(name = "db1")
    @ConfigurationProperties(prefix = "spring.datasource.druid.db1" )
    public DataSource db1() {
        return DruidDataSourceBuilder.create().build();
    }

    @Bean(name = "db2")
    @ConfigurationProperties(prefix = "spring.datasource.druid.db2" )
    public DataSource db2() {
        return DruidDataSourceBuilder.create().build();
    }

    /**
     * 动态数据源配置
     * @return
     */
    @Bean
    @Primary
    public DataSource multipleDataSource(@Qualifier("db1") DataSource db1, @Qualifier("db2") DataSource db2) {
        MultipleDataSource multipleDataSource = new MultipleDataSource();
        Map< Object, Object > targetDataSources = new HashMap<>();
        targetDataSources.put(DataSourceEnum.DB1.getValue(), db1);
        targetDataSources.put(DataSourceEnum.DB2.getValue(), db2);
        //添加数据源
        multipleDataSource.setTargetDataSources(targetDataSources);
        //设置默认数据源
        multipleDataSource.setDefaultTargetDataSource(db1);
        return multipleDataSource;
    }

    @Bean("sqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory() throws Exception {
        MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean();
        sqlSessionFactory.setDataSource(multipleDataSource(db1(),db2()));
        //sqlSessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:/mapper/*/*Mapper.xml"));

        MybatisConfiguration configuration = new MybatisConfiguration();
        //configuration.setDefaultScriptingLanguage(MybatisXMLLanguageDriver.class);
        configuration.setJdbcTypeForNull(JdbcType.NULL);
        configuration.setMapUnderscoreToCamelCase(true);
        configuration.setCacheEnabled(false);
        sqlSessionFactory.setConfiguration(configuration);
        sqlSessionFactory.setPlugins(new Interceptor[]{ //PerformanceInterceptor(),OptimisticLockerInterceptor()
                paginationInterceptor() //添加分页功能
        });
        //sqlSessionFactory.setGlobalConfig(globalConfiguration());
        return sqlSessionFactory.getObject();
    }

    /*@Bean
    public GlobalConfiguration globalConfiguration() {
        GlobalConfiguration conf = new GlobalConfiguration(new LogicSqlInjector());
        conf.setLogicDeleteValue("-1");
        conf.setLogicNotDeleteValue("1");
        conf.setIdType(0);
        //conf.setMetaObjectHandler(new MyMetaObjectHandler());
        conf.setDbColumnUnderline(true);
        conf.setRefresh(true);
        return conf;
    }*/
}

MyBatiesPlusConfiguration.java

　　　　SwaggerConfiguration.java

package com.seawaterbt.ssm.config;

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.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration
@EnableSwagger2
public class SwaggerConfiguration {

    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.seawaterbt.ssm.controller"))
                .paths(PathSelectors.any())
                .build()
                .apiInfo(apiInfo());
    }
    private ApiInfo apiInfo(){
        return new ApiInfoBuilder()
                .title("多数据源 SSM 测试服务")
                .description("多数据源 SSM 测试文档")
                .termsOfServiceUrl("http://www.seawaterbt.com")
                //.contact(new Contact("海水不甜","http://www.seawaterbt.com","809318068@qq.com"))
                .version("1.0")
                .build();
    }

}

SwaggerConfiguration.java

　　10. crud Controller接口

　　　　1. Entity

　　　　　　Student.java

package com.seawaterbt.ssm.entity;

import com.baomidou.mybatisplus.annotations.TableId;
import com.baomidou.mybatisplus.annotations.TableName;
import com.baomidou.mybatisplus.enums.IdType;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

@Api("学生实体对象")
@Data
@TableName("t_student")
public class Student {

    @ApiModelProperty("学生id")
    @TableId(type = IdType.AUTO)
    private Integer id;

    @ApiModelProperty("学生姓名")
    private String name;

    @ApiModelProperty("学生年龄")
    private Integer age;

    @ApiModelProperty("学生班级")
    private String classname;

}

Student.java

　　　　　　Teacher.java

package com.seawaterbt.ssm.entity;

import com.baomidou.mybatisplus.annotations.TableId;
import com.baomidou.mybatisplus.annotations.TableName;
import com.baomidou.mybatisplus.enums.IdType;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

@Api("老师实体对象")
@Data
@TableName("t_teacher")
public class Teacher {

    @ApiModelProperty("老师id")
    @TableId(type = IdType.AUTO)
    private Integer id;

    @ApiModelProperty("老师姓名")
    private String name;

    @ApiModelProperty("老师年龄")
    private Integer age;

    @ApiModelProperty("老师所教学科")
    private String subject;
}

Teacher.java

　　　　2. Mapper 接口及其xml

　　　　　　StudentMapper.java

package com.seawaterbt.ssm.mapper;

import com.baomidou.mybatisplus.mapper.BaseMapper;
import com.seawaterbt.ssm.entity.Student;

public interface StudentMapper extends BaseMapper<Student> {
}

StudentMapper.java

　　　　　　StudentMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.seawaterbt.ssm.mapper.StudentMapper">

</mapper>

StudentMapper.xml

　　　　　　TeacherMapper.java

package com.seawaterbt.ssm.mapper;

import com.baomidou.mybatisplus.mapper.BaseMapper;
import com.seawaterbt.ssm.entity.Teacher;

public interface TeacherMapper extends BaseMapper<Teacher> {
}

TeacherMapper.java

　　　　　　TeacherMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.seawaterbt.ssm.mapper.TeacherMapper">

</mapper>

TeacherMapper.xml

　　　　3. Service 接口及其实现类

　　　　　　StudentService.java

package com.seawaterbt.ssm.service;

import com.baomidou.mybatisplus.service.IService;
import com.seawaterbt.ssm.entity.Student;

public interface StudentService extends IService<Student> {
}

StudentService.java

　　　　　　StudentServiceImpl.java

package com.seawaterbt.ssm.service.impl;

import com.baomidou.mybatisplus.service.impl.ServiceImpl;
import com.seawaterbt.ssm.entity.Student;
import com.seawaterbt.ssm.mapper.StudentMapper;
import com.seawaterbt.ssm.service.StudentService;
import org.springframework.stereotype.Service;

@Service
public class StudentServiceImpl extends ServiceImpl<StudentMapper,Student> implements StudentService {
}

StudentServiceImpl.java

　　　　　　TeacherService.java

package com.seawaterbt.ssm.service;

import com.baomidou.mybatisplus.service.IService;
import com.seawaterbt.ssm.entity.Teacher;


public interface TeacherService extends IService<Teacher> {
}

TeacherService.java

　　　　　　TeacherServiceImpl.java

package com.seawaterbt.ssm.service.impl;

import com.baomidou.mybatisplus.mapper.Wrapper;
import com.baomidou.mybatisplus.plugins.Page;
import com.baomidou.mybatisplus.service.impl.ServiceImpl;
import com.seawaterbt.ssm.annotation.DataSource;
import com.seawaterbt.ssm.entity.Teacher;
import com.seawaterbt.ssm.enums.DataSourceEnum;
import com.seawaterbt.ssm.mapper.TeacherMapper;
import com.seawaterbt.ssm.service.TeacherService;
import org.springframework.stereotype.Service;

import java.io.Serializable;
import java.util.Collection;
import java.util.List;
import java.util.Map;

@Service
public class TeacherServiceImpl extends ServiceImpl<TeacherMapper,Teacher> implements TeacherService {

    @Override
    @DataSource(DataSourceEnum.DB2)
    public boolean insert(Teacher entity) {
        return super.insert(entity);
    }

    @Override
    @DataSource(DataSourceEnum.DB2)
    public boolean deleteById(Serializable id) {
        return super.deleteById(id);
    }

    @Override
    @DataSource(DataSourceEnum.DB2)
    public boolean updateById(Teacher entity) {
        return super.updateById(entity);
    }

    @Override
    @DataSource(DataSourceEnum.DB2)
    public Teacher selectById(Serializable id) {
        return super.selectById(id);
    }

    @Override
    @DataSource(DataSourceEnum.DB2)
    public List<Teacher> selectList(Wrapper<Teacher> wrapper) {
        return super.selectList(wrapper);
    }

    @Override
    @DataSource(DataSourceEnum.DB2)
    public Page<Teacher> selectPage(Page<Teacher> page) {
        return super.selectPage(page);
    }

    @Override
    @DataSource(DataSourceEnum.DB2)
    public Page<Teacher> selectPage(Page<Teacher> page, Wrapper<Teacher> wrapper) {
        return super.selectPage(page, wrapper);
    }
}

TeacherServiceImpl.java

　　　　4. Vo

　　　　　　StudentVo.java

package com.seawaterbt.ssm.vo;

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

@Data
@ApiModel("学生vo")
public class StudentVo {

    @ApiModelProperty("学生姓名")
    private String name;

    @ApiModelProperty("学生年龄")
    private Integer age;

    @ApiModelProperty("学生班级")
    private String classname;
}

StudentVo.java

　　　　　　TeacherVo.java

package com.seawaterbt.ssm.vo;

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

@Data
@ApiModel("老师vo")
public class TeacherVo {

    @ApiModelProperty("老师姓名")
    private String name;

    @ApiModelProperty("老师年龄")
    private Integer age;

    @ApiModelProperty("老师教的学科")
    private String subject;
}

TeacherVo.java

　　　　5. Controller

　　　　　　StudentController.java

package com.seawaterbt.ssm.controller;

import com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.baomidou.mybatisplus.mapper.Wrapper;
import com.seawaterbt.ssm.entity.Student;
import com.seawaterbt.ssm.service.StudentService;
import com.seawaterbt.ssm.vo.StudentVo;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@Api("对学生表CRUD")
@RestController
@RequestMapping("/student")
public class StudentController {

    @Autowired
    private StudentService studentService;

    @ApiOperation("添加学生")
    @PostMapping("/add")
    public String add(@RequestBody StudentVo student){
        Student stu = new Student();
        stu.setName(student.getName());
        stu.setAge(student.getAge());
        stu.setClassname(student.getClassname());
        return studentService.insert(stu)?"添加成功":"添加失败";
    }

    @ApiOperation("删除学生")
    @DeleteMapping("/delete/{id}")
    public String delete(@ApiParam("学生的主键id")@PathVariable(value = "id") Integer id){
        return studentService.deleteById(id)?"删除成功":"删除失败";
    }

    @ApiOperation("修改学生")
    @PostMapping("/update")
    public String update(@RequestBody Student student){
        return studentService.updateById(student)?"修改成功":"修改失败";
    }

    @ApiOperation(value = "查询学生")
    @GetMapping("/list")
    public List<Student> list(){
        Wrapper<Student> wrapper = new EntityWrapper<>();
        return studentService.selectList(wrapper);
    }
}

StudentController.java

　　　　　　TeacherController.java

package com.seawaterbt.ssm.controller;

import com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.baomidou.mybatisplus.mapper.Wrapper;
import com.seawaterbt.ssm.entity.Teacher;
import com.seawaterbt.ssm.service.TeacherService;
import com.seawaterbt.ssm.vo.TeacherVo;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@Api("对老师表CRUD")
@RestController
@RequestMapping("/teacher")
public class TeacherController {

    @Autowired
    private TeacherService teacherService;

    @ApiOperation(value = "添加老师")
    @PostMapping("/add")
    public String add(@RequestBody TeacherVo teacher){
        Teacher tea = new Teacher();
        tea.setName(teacher.getName());
        tea.setAge(teacher.getAge());
        tea.setSubject(teacher.getSubject());
        return teacherService.insert(tea)?"添加成功":"添加失败";
    }

    @ApiOperation("删除老师")
    @DeleteMapping("/delete/{id}")
    public String delete(@ApiParam("老师的主键id")@PathVariable(value = "id") Integer id){
        return teacherService.deleteById(id)?"删除成功":"删除失败";
    }

    @ApiOperation("修改老师")
    @PostMapping("/update")
    public String update(@RequestBody Teacher teacher){
        return teacherService.updateById(teacher)?"修改成功":"修改失败";
    }

    @ApiOperation(value = "查询老师")
    @GetMapping("/list")
    public List<Teacher> list(){
        Wrapper<Teacher> wrapper = new EntityWrapper<>();
        return teacherService.selectList(wrapper);
    }
}

TeacherController.java

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原文地址：https://www.cnblogs.com/hsbt2333/p/9347249.html

使用springboot + druid + mybatisplus完成多数据源配置

一. 简介

1. 版本

2. 项目地址

3. 留个记录，方便查找

二. 详细步骤

1. 新建springboot项目

2. 导入依赖

3. Maven多环境配置 看pom文件

4. 编写application.yml

5. 新建DataSourceContextHolder

6. 新建 MultipleDataSource

7. 新建DataSourceEnum

8. 新建注解 DataSource

9. 新建并配置DruidConfiguration，MybatisplusConfiguration，SwaggerConfiguration

10. crud Controller接口

1. Entity

2. Mapper 接口及其xml

3. Service 接口及其实现类

4. Vo

5. Controller

　1. 版本

　 2. 项目地址

　3. 留个记录，方便查找

　　1. 新建springboot项目

　　2. 导入依赖

　　3. Maven多环境配置看pom文件

　　4. 编写application.yml

　　5. 新建DataSourceContextHolder

　　6. 新建 MultipleDataSource

　　7. 新建DataSourceEnum

　　8. 新建注解 DataSource

　　9. 新建并配置DruidConfiguration，MybatisplusConfiguration，SwaggerConfiguration

　　10. crud Controller接口

　　　　1. Entity

　　　　2. Mapper 接口及其xml

　　　　3. Service 接口及其实现类

　　　　4. Vo

　　　　5. Controller