丁雄超 / my-study-project · 提交

转到一个项目

作者 丁雄超
提交 89ecc47e3623d31d63e500d0b6435a08b53003a9 0 个父辈

搭建springboot工程项目,基于mybatisplus做了增删改查,多删,逻辑删除,分页条件查询

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正在显示 21 个修改的文件 包含 509 行增加 和 0 行删除
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<?xml version="1.0" encoding="UTF-8"?>
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.0</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>studySpringBoot01</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>studySpringBoot01</name>
<description>studySpringBoot01</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.12</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
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<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
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<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.4.0</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
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<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
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... ...
package com.example.studyspringboot01;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class StudySpringBoot01Application {
public static void main(String[] args) {
SpringApplication.run(StudySpringBoot01Application.class, args);
}
}
... ...
package com.example.studyspringboot01.config;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.OptimisticLockerInnerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class MyBatisPlusConfig {
@Bean
public MybatisPlusInterceptor mybatisPlusInterceptor(){
//定义mybatisplus拦截器
MybatisPlusInterceptor mybatisPlusInterceptor = new MybatisPlusInterceptor();
//添加具体的分页拦截器
mybatisPlusInterceptor.addInnerInterceptor(new PaginationInnerInterceptor());
//添加乐观锁拦截器
mybatisPlusInterceptor.addInnerInterceptor(new OptimisticLockerInnerInterceptor());
return mybatisPlusInterceptor;
}
}
... ...
package com.example.studyspringboot01.controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/books")
public class BookController {
@GetMapping("/{id}")
public String getById(@PathVariable Integer id){
System.out.println("id= " + id);
return "hello,springBoot程序!";
}
}
... ...
package com.example.studyspringboot01.dao;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.studyspringboot01.domain.User;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface UserDao extends BaseMapper<User> {
}
... ...
package com.example.studyspringboot01.domain;
import com.baomidou.mybatisplus.annotation.TableLogic;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;
@TableName("tb_user")
@Data
public class User {
public Integer id;
public String username;
public String password;
//逻辑删除字段,标记当前字段是否被删除
//@TableLogic(value = "0",delval = "1") //0表示未删除,1表示已删除
public Integer deleted;
public Integer version;
}
... ...
spring:
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/db1?serverTimezone=UTC
username: root
password: root
mybatis-plus:
global-config:
db-config:
logic-delete-field: deleted #??????????
logic-not-delete-value: 0 #?????0
logic-delete-value: 1 #??????1
... ...
package com.example.studyspringboot01;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.studyspringboot01.dao.UserDao;
import com.example.studyspringboot01.domain.User;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import java.util.ArrayList;
import java.util.List;
@SpringBootTest
class StudySpringBoot01ApplicationTests {
@Autowired
private UserDao userDao;
//查询所有
@Test
public void selectAllTest(){
List<User> userList = userDao.selectList(null);
userList.forEach(s -> System.out.println(s));
}
//新增
@Test
public void save(){
User user = new User();
user.id = 1;
user.username = "dingxiongchao";
user.password = "223344";
userDao.insert(user);
}
//删除
@Test
public void delete(){
userDao.deleteById(123);
}
//修改
@Test
public void update(){
User user = new User();
user.id = 13;
user.username = "1333";
user.password = "1343";
userDao.updateById(user);
}
//查询单个
@Test
public void selectById(){
userDao.selectById(122);
}
//分页查询
@Test
public void page(){
Page page = new Page(1,2);
Page page1 = userDao.selectPage(page, null);
System.out.println("分页查询,当前是多少页:"+ page1.getCurrent());
System.out.println("分页查询,一页能查询几条数据:"+ page1.getSize());
System.out.println("分页查询,一共多少页:"+ page1.getPages());
System.out.println("分页查询,一共多少条数据:"+ page1.getTotal());
System.out.println("分页查询,当前页显示数据:" + page1.getRecords());
}
//多选删除
@Test
public void deleteByIds(){
List<Integer> list = new ArrayList<>();
list.add(4);
list.add(5);
list.add(9);
userDao.deleteBatchIds(list);
}
}
... ...
spring:
datasource:
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/db1?serverTimezone=UTC
username: root
password: root
mybatis-plus:
global-config:
db-config:
logic-delete-field: deleted #??????????
logic-not-delete-value: 0 #?????0
logic-delete-value: 1 #??????1
... ...