springboot+mybatis整合——基础版

Posted 2020-10-30 思思博士

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我用的事IDEA，jdk版本是1.7.新建项目的时候这个地方的选择需要注意一下，springboot版本是1.5的，否则不支持1.7的jdk

pom.xml

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>

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

        <!-- 数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.20</version>
        </dependency>

======================异常处理

ExceptionHandler.java

package com.springbootmybatis.demo.exceptiion;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.HashMap;
import java.util.Map;

/**
 * 异常处理类
 */
@ControllerAdvice
public class ExceptionHandle {
    private  final static Logger logger= LoggerFactory.getLogger(ExceptionHandle.class);
    /**
     * 处理返回的Exception类型的异常
     * @param e
     * @return
     */
    @ResponseBody
    @ExceptionHandler(value = Exception.class)
    public Map<String,Object> handler(Exception e){
        Map<String,Object> map=new HashMap<String, Object>();
        if(e instanceof MyException){//自定义异常
            MyException me=(MyException)e;
            map.put("status",me.getStatus());
            map.put("msg",e.getMessage());
        }else{
            //logger.error("系统异常：{}",e);
            map.put("status",2);
            map.put("msg","程序异常");
        }
        return map;
    }
}

MyException.java

package com.springbootmybatis.demo.exceptiion;

public class MyException extends RuntimeException {
    private Integer status;
    public MyException(Integer status,String message) {
        super(message);
        this.status=status;
    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }
}

================AOP

HttpAspect.java

package com.springbootmybatis.demo.aspect;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * Aop基本示例
 */
@Aspect
@Component
public class HttpAspect {
    private  final static Logger logger= LoggerFactory.getLogger(HttpAspect.class);


    /**
     * 方法执行之前，拦截单个方法
     */
    @Before("execution(public * com.springbootmybatis.demo.controller.TestBootController.getUser(..))")
    public void  aopOneBeforeMethod(JoinPoint joinpoint){
        ServletRequestAttributes attributes= (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request=attributes.getRequest();
        //url
        logger.info("url={}",request.getRequestURL());
        //method
        logger.info("method={}",request.getMethod());
        //ip
        logger.info("ip={}", request.getRemoteAddr());
        //类方法
        logger.info("class_method={}",joinpoint.getSignature().getDeclaringTypeName()+"."+joinpoint.getSignature().getName());
        //参数
        logger.info("args={}",joinpoint.getArgs());
        System.out.println("请求了getUser方法-->前");
    }
    /**
     * 方法执行之前，拦截所有的方法
     */
    @Before("execution(public * com.springbootmybatis.demo.controller.TestBootController.*(..))")
    public void  aopAllBeforeMethod(){
        System.out.println("执行了所有的方法拦截-->前");
    }

    /**
     * 方法执行之后，拦截单个方法
     */
    @After("execution(public * com.springbootmybatis.demo.controller.TestBootController.getUser(..))")
    public void  aopOneAfterMethod(){
        System.out.println("请求了getUser方法-->后");
    }
    /**
     * 方法执行之前，拦截所有的方法
     */
    @After("execution(public * com.springbootmybatis.demo.controller.TestBootController.*(..))")
    public void  aopAllAfterMethod(){
        System.out.println("执行了所有的方法拦截-->后");
    }

}

HttpAspectNoRepeat.java

package com.springbootmybatis.demo.aspect;

import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

/**
 * Aop基本示例，去除重复的拦截配置
 */
@Aspect
@Component
public class HttpAspectNoRepeat {

    private  final static Logger logger= LoggerFactory.getLogger(HttpAspectNoRepeat.class);

    @Pointcut("execution(public * com.springbootmybatis.demo.controller.TestBootController.getUser(..))")
    public void aopOne(){

    }
    @Pointcut("execution(public * com.springbootmybatis.demo.controller.TestBootController.*(..))")
    public void aopAll(){

    }
    /**
     * 方法执行之前，拦截单个方法
     */
    @Before("aopOne()")
    public void  aopOneBeforeMethod(){
        logger.info("去除重复配置后的单个方法拦截-->前-->logger");
    }
    /**
     * 方法执行之前，拦截所有的方法
     */
    @Before("aopAll()")
    public void  aopAllBeforeMethod(){
        System.out.println("去除重复配置后的所有方法拦截-->前");
    }

    /**
     * 方法执行之后，拦截单个方法
     */
    @After("aopOne()")
    public void  aopOneAfterMethod(){
        System.out.println("去除重复配置后的单个方法拦截-->后");
    }
    /**
     * 方法执行之前，拦截所有的方法
     */
    @After("aopAll()")
    public void  aopAllAfterMethod(){
        System.out.println("去除重复配置后的所有方法拦截-->后");
    }

    @AfterReturning(returning = "object",pointcut = "aopOne()")
    public void getReturnFromMethod(Object object){
        logger.info("返回值：{}",object);
    }
}

TestBootController.java

package com.springbootmybatis.demo.controller;

import com.springbootmybatis.demo.entity.Gys;
import com.springbootmybatis.demo.exceptiion.MyException;
import com.springbootmybatis.demo.service.GysServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/testboot")
public class TestBootController {

    @RequestMapping("/getgys")
    public Gys getUser() {
        Gys user = new Gys();
        user.setRoleName("test");
        return user;
    }

    @Autowired
    private GysServiceImpl gysService;
    @RequestMapping("/getlist")
    public List<Gys> getlist() {
        List<Gys> list=null;
       try {
        list=gysService.getGysList();
       }catch (Exception e){
           e.printStackTrace();
       }
        return list;
    }


    @ResponseBody
    @RequestMapping("/testException")
    public Map<String,Object> testException() throws Exception {
        boolean a=false;
        if(a){
            return new HashMap<String, Object>();
        }else{
            int c=0;
            int v=5/c;
            return null;
            //throw new  Exception("测试一个异常");
        }
    }
    @ResponseBody
    @RequestMapping("/testMyException")
    public Map<String,Object> testMyException() throws Exception {
        boolean a=false;
        if(a){
            return new HashMap<String, Object>();
        }else{
            throw new MyException(3,"测试一个自定义异常");
        }
    }
}

ITestDao.java

package com.springbootmybatis.demo.dao;

import com.springbootmybatis.demo.entity.Gys;

import java.util.List;

public interface IGysDao {
    List<Gys> getUserList() throws  Exception;
}

GysServiceImpl.java

package com.springbootmybatis.demo.service;

import com.springbootmybatis.demo.dao.IGysDao;
import com.springbootmybatis.demo.entity.Gys;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

@Service("gysService")
public class GysServiceImpl {
    @Autowired
    private IGysDao iGysDao;

    public List<Gys> getGysList() throws  Exception{
        return  iGysDao.getUserList();
    }
}

DemoApplication.java

package com.springbootmybatis.demo;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.support.SpringBootServletInitializer;

@SpringBootApplication
@MapperScan("com.springbootmybatis.demo.dao")
public class DemoApplication extends SpringBootServletInitializer{

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

Gys.java

package com.springbootmybatis.demo.entity;

public class Gys {
    private String roleName;

    public String getRoleName() {
        return roleName;
    }

    public void setRoleName(String roleName) {
        this.roleName = roleName;
    }
}

Gys.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.springbootmybatis.demo.dao.IGysDao">
    <select id="getUserList" resultType="com.springbootmybatis.demo.entity.Gys">
        SELECT  * FROM  gys;
    </select>
</mapper>

application-dev.yml

mybatis:
  mapper-locations: classpath:mapper/*.xml
spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/springmvc-mybatis
    username: root
    password: gys
    type: com.alibaba.druid.pool.DruidDataSource
server:
  port: 8082
logging:
  level: debug

application.yml

spring:
  profiles:
    active: dev

===============单元测试(可以在需要测试的界面右击==>go to==>test...)

测试service

package com.springbootmybatis.demo;

import com.springbootmybatis.demo.entity.Gys;
import com.springbootmybatis.demo.service.GysServiceImpl;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.List;


/**
 * 测试service
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class TestGysService {

    @Autowired
    private GysServiceImpl gysService;

    @Test
    public  void getGysList() throws  Exception{
        List<Gys> list=gysService.getGysList();
        Assert.assertEquals(2,list.size());
    }
}

测试controller

package com.springbootmybatis.demo.controller;

import org.junit.Test;
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.test.context.junit4.SpringRunner;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.result.MockMvcResultMatchers;

import static org.junit.Assert.*;

/**
 * 测试controller
 */
@RunWith(SpringRunner.class)
@SpringBootTest
@AutoConfigureMockMvc
public class TestBootControllerTest {

    @Autowired
    private MockMvc mvc;

    @Test
    public void getUser() throws Exception {
        mvc.perform(MockMvcRequestBuilders.get("/getgys"))
                .andExpect(MockMvcResultMatchers.status().isOk());
    }

}

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