使用springboot + druid + mybatisplus完成多数据源配置「建议收藏」

2022-02-10 08:19:36 浏览数 (1)

大家好，我是架构君，一个会写代码吟诗的架构师。今天说一说使用springboot druid mybatisplus完成多数据源配置「建议收藏」,希望能够帮助大家进步!!!

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

　　该地址有初始sql和测试方法

　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。

  1. 新建DataSourceEnum 用于存放数据源名称。
  2. 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
  3. 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。
  4. crud Controller接口。
  5. 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

代码语言：javascript复制
<?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>

　3. Maven多环境配置 看pom文件

　4. 编写application.yml

代码语言：javascript复制
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'

　　5. 新建DataSourceContextHolder

代码语言：javascript复制
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();
    }
}

　　6. 新建 MultipleDataSource

代码语言：javascript复制
package com.seawaterbt.ssm.multiple;

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

public class MultipleDataSource extends AbstractRoutingDataSource {

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

　　7. 新建DataSourceEnum

代码语言：javascript复制
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;
    }
}

　　8. 新建注解 DataSource

代码语言：javascript复制
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;
}
代码语言：javascript复制
@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

代码语言：javascript复制
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;
    }
}
代码语言：javascript复制
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;
    }*/
}
代码语言：javascript复制
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();
    }

}

　　10. crud Controller接口

　　　　1. Entity

代码语言：javascript复制
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;

}
代码语言：javascript复制
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;
}

　　　　2. Mapper 接口及其xml

代码语言：javascript复制
package com.seawaterbt.ssm.mapper;

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

public interface StudentMapper extends BaseMapper<Student> {
}
代码语言：javascript复制
<?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>
代码语言：javascript复制
package com.seawaterbt.ssm.mapper;

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

public interface TeacherMapper extends BaseMapper<Teacher> {
}
代码语言：javascript复制
<?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>

　　　　3. Service 接口及其实现类

代码语言：javascript复制
package com.seawaterbt.ssm.service;

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

public interface StudentService extends IService<Student> {
}
代码语言：javascript复制
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 {
}
代码语言：javascript复制
package com.seawaterbt.ssm.service;

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


public interface TeacherService extends IService<Teacher> {
}
代码语言：javascript复制
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);
    }
}

　　　　4. Vo

代码语言：javascript复制
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;
}
代码语言：javascript复制
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;
}

　　　　5. Controller

代码语言：javascript复制
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);
    }
}
代码语言：javascript复制
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);
    }
}
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