SpringBoot整合其他技术_关于springboot 整合其他技术,正确的是-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_38264999/article/details/98474463

本文详细介绍SpringBoot整合Mybatis、Junit、SpringDataJPA及Redis的过程，包括依赖添加、配置编写、实体类与Mapper创建、Controller及Repository编写，以及测试方法。

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一、SpringBoot整合Mybatis

1.1、添加Mybatis的依赖

<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.1.0</version>
</dependency>

1.2、添加数据库驱动依赖

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>

1.3、添加数据库连接信息

#数据库连接信息
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/springboot?serverTimezone=UTC
    username: waggag
    password: 225514

1.4、创建User表

CREATE TABLE `user` (
	`id` int ( 11 ) NOT NULL AUTO_INCREMENT,
	`username` varchar ( 50 ) DEFAULT NULL,
	`password` varchar ( 50 ) DEFAULT NULL,
	`name` varchar ( 50 ) DEFAULT NULL,
	PRIMARY KEY ( `id` ) 
) ENGINE = InnoDB AUTO_INCREMENT = 10 DEFAULT CHARSET = utf8;

INSERT INTO `user`
VALUES( '1', 'zhangsan', '123', '张三' );
INSERT INTO `user`
VALUES( '2', 'lisi', '123', '李四' );

1.5、创建实体类

使用lombok注解，需要引入依赖

  <dependency>
     <groupId>org.projectlombok</groupId>
     <artifactId>lombok</artifactId>
  </dependency>

package cn.waggag.pojo;

import lombok.Data;

@Data
public class User {
    // 主键
    private Long id;
    // 用户名
    private String username;
    // 密码
    private String password;
    // 姓名
    private String name;
}

1.6、编写Mapper及映射文件

package cn.waggag.mapper;

import cn.waggag.pojo.User;
import org.apache.ibatis.annotations.Mapper;

import java.util.List;

@Mapper
public interface UserMapper {
    public List<User> queryList();
}

<?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="cn.waggag.mapper.UserMapper">
    <select id="queryList" resultType="user">
        select * from user
    </select>
</mapper>

1.7、在application.yml中添加mybatis的信息

#spring集成Mybatis环境
mybatis:
  #pojo别名扫描包
  type-aliases-package: cn.waggag.pojo
  #加载Mybatis映射文件
  mapper-locations: mapper/*Mapper.xml

1.8、编写Controller

package cn.waggag.controller;

import cn.waggag.mapper.UserMapper;
import cn.waggag.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@Controller
public class UserController {
    @Autowired
    private UserMapper userMapper;

    @RequestMapping("/query")
    @ResponseBody
    public List<User> queryList(){
        List<User> userList = userMapper.queryList();
        return userList;
    }
}

1.9、测试

二、SpringBoot整合Junit

2.1、添加Junit的依赖

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

2.2、编写测试类

package cn.waggag;

import cn.waggag.domain.User;
import cn.waggag.mapper.UserMapper;
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;

@SpringBootTest(classes = SpringbootQuick2Application.class)
@RunWith(SpringRunner.class)
public class MybatisTest {

    @Autowired
    private UserMapper userMapper;

    @Test
    public void test(){
        List<User> users = userMapper.queryList();
        System.out.println(users);
    }
}

三、SpringBoot继承SpringDataJPA

3.1、导入Jpa的依赖

        <!-- springBoot JPA的起步依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

3.2、添加数据库驱动依赖

        <!-- MySQL连接驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

3.3、在application.properties中配置数据库和jpa的相关属性

#DB Configuration:
spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/springboot?serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=225514

#JPA Configuration:
spring.jpa.database=MySQL
spring.jpa.show-sql=true
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.naming_strategy=org.hibernate.cfg.ImprovedNamingStrategy

3.4、创建实体配置实体

package cn.waggag.pojo;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO.IDENTITY)
    private Long id;
    private String name;
    private String username;
    private String password;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

3.5、编写UserRespository

package cn.waggag.repository;

import cn.waggag.pojo.User;
import org.springframework.data.jpa.repository.JpaRepository;

import java.util.List;

public interface UserRepository extends JpaRepository<User,Long> {

    List<User> findAll();

}

3.6、编写测试类

package cn.waggag;

import cn.waggag.pojo.User;
import cn.waggag.repository.UserRepository;
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;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = JpaApplication.class)
public class JpaTest {

    @Autowired
    private UserRepository userRepository;

    @Test
    public void test(){
        List<User> userList = userRepository.findAll();
        System.out.println(userList);
    }

}

3.7、测试结果

四、Springboot整合Redis

4.1、导入Redis的依赖

        <!-- 配置使用redis启动器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

4.2、配置Redis的连接信息

#配置Redis
spring.redis.host=106.12.55.66
server.port=6379

4.3、RedisTemplate操作Redis

package cn.waggag;

import cn.waggag.pojo.User;
import cn.waggag.repository.UserRepository;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
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.data.redis.core.RedisTemplate;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = JpaApplication.class)
public class RedisTest {

    @Autowired
    private RedisTemplate<String,String> redisTemplate;

    @Autowired
    private UserRepository userRepository;

    @Test
    public void test() throws JsonProcessingException {
        //1.从Redis中获取数据，数据的形式为Json字符串
        String usersJson = redisTemplate.boundValueOps("user.findAll").get();
        //2.判断redis中是否存在数据
        if(usersJson == null){
            //3.不存在数据从数据库中查询
            List<User> userList = userRepository.findAll();
            //4.将查询的数据存储到Redis中
            //4.1将list集合转为json字符串
            ObjectMapper objectMapper = new ObjectMapper();
            usersJson = objectMapper.writeValueAsString(userList);
            //4.2存储到redis
            redisTemplate.boundValueOps("user.findAll").set(usersJson);

            System.out.println("============database============");
        }else{
            System.out.println("==============redis============");
        }
        //4.将数据输出
        System.out.println(usersJson);
    }
}

4.4、redis测试结果