文章目录

• 1.maven依赖
• 2.yml配置
• 3.实体类
• 4.Dao层
• 5.增删改查测试

1.maven依赖

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.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>
</properties>

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

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

<!--数据库-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>

<!-- mybatis-plus -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>2.3</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.6</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.9</version>
</dependency>

</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
</plugins>
</build>

2.yml配置

spring:
datasource:
driverClassName: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/bbs?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true
username: root
password: root
type: com.alibaba.druid.pool.DruidDataSource
druid:
stat-view-servlet:
url-pattern: /druid/*
reset-enable: true
login-username: admin
login-password: admin
validation-query: SELECT 'x'

3.实体类

@Data
@TableName(value = "bbs_test")
public class Detail {

@TableId
private String id ;  //) NOT NULL编号
private Integer sortId;  // bigint(20) NOT NULL分类编号
private String title;  // varchar(50) NOT NULL标题
private String detail;  // varchar(200) NOT NULL详细内容
private String author;  // varchar(50) NOT NULL作者;
@JsonFormat(pattern = "yyyy-MM-dd")
private Date createDate;  // timestamp NOT NULL发布时间
private Integer replyCount;  // int(11) NOT NULL回复次数

}

4.Dao层

@Mapper
public interface DetailMapper extends BaseMapper<Detail> {

}

extends BaseMapper<Detail>

5.增删改查测试

@RestController
public class DetailContoller {

@Autowired
private DetailMapper mapper;

@GetMapping("/selectOne/{id}")
public Object testDetailForId(@PathVariable("id")String id){

Detail details = mapper.selectById(id);
return details;
}

@GetMapping("/select/{limit}/{page}")
public Object testDetail(@PathVariable("limit")Integer limit,@PathVariable("page")Integer page){

//精准查询 eq and detail = detail
//        Map<String, Object> map = new HashMap<>();
//        map.put("detail",detail);
//        List<Detail> details = mapper.selectByMap(map);

//        Wrapper<Detail> wap = new EntityWrapper<>(); //多条件查询
//        //select * form xx where xx like "
//        wap.like("detail",detail); //模糊查询
//        //select * from xxx where orderId between 10 and 20
//        wap.notBetween("orderId",10,20);
//        //select * from xxx where createDate between 2019-1-1 and 20
//        wap.between("createDate","2019-1-1","2019-3-3");
//        wap.eq("detail",detail);
//        wap.orderBy("id"); //asc
//        Collection<String> sa = new ArrayList<>();
//        //select * from xxx where createDate between 2019-1-1 and 20 order by id,name desc
//        ((ArrayList<String>) sa).add("name");
//        wap.orderDesc(sa);
//
//        List<Detail> details = mapper.selectList(wap);

//分页
Wrapper<Detail> wap = new EntityWrapper<>();
RowBounds row = new RowBounds(limit,page);
List<Detail> details = mapper.selectPage(row, wap);
return details;
}

@GetMapping("/add")
public String add(){
Detail detail = new Detail();
detail.setId(UUID.randomUUID().toString().substring(1,6));
detail.setAuthor("你猜");
detail.setReplyCount(321);
detail.setCreateDate(new Date());
detail.setDetail("whgfsdjhgfdgfd");
detail.setSortId(1);
detail.setTitle("title111");
System.out.println(detail);
return String.valueOf(mapper.insert(detail));
}

@GetMapping("/update/{id}")
public String update(@PathVariable("id")String id){
Detail detail = new Detail();
detail.setId(id);
detail.setAuthor("修改--1");
detail.setReplyCount(321);
detail.setCreateDate(new Date());
detail.setDetail("修改--whgfsdjhgfdgfd");
detail.setSortId(1);
detail.setTitle("修改--title111");
return String.valueOf(mapper.updateById(detail));
}

@GetMapping("/delete/{id}")
public String delete(@PathVariable("id")String id){
return String.valueOf(mapper.deleteById(id));
}

}