完成查询区域信息。

封装ResultVO和R工具类

.gitignore

@@ -0,0 +1,21 @@
+# Created by .ignore support plugin (hsz.mobi)
+### Example user template template
+### Example user template
+
+# IntelliJ project files
+.idea
+*.iml
+out
+gen
+### Maven template
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+.mvn/wrapper/maven-wrapper.jar
+

pom.xml

@@ -0,0 +1,46 @@
+<?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>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.3.12.RELEASE</version>
+        <relativePath/>
+    </parent>
+    <groupId>com.mashibing</groupId>
+    <artifactId>air</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+
+    <dependencies>
+        <!--        starter-web，和页面交互-->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <!--        与数据库交互需要的内容-->
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>5.1.49</version>
+        </dependency>
+        <dependency>
+            <groupId>org.mybatis.spring.boot</groupId>
+            <artifactId>mybatis-spring-boot-starter</artifactId>
+            <version>2.2.2</version>
+        </dependency>
+        <dependency>
+            <groupId>com.github.pagehelper</groupId>
+            <artifactId>pagehelper-spring-boot-starter</artifactId>
+            <version>1.4.1</version>
+        </dependency>
+        <!--        导入JUnit测试内容-->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

src/main/java/com/mashibing/AirStarterApp.java

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+package com.mashibing;
+
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @author 郑大仙丶
+ * @version V1.0.0
+ */
+@SpringBootApplication
+@MapperScan(basePackages = "com.mashibing.mapper")
+public class AirStarterApp {
+
+    public static void main(String[] args) {
+        SpringApplication.run(AirStarterApp.class,args);
+    }
+}

src/main/java/com/mashibing/controller/AirController.java

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+package com.mashibing.controller;
+
+import com.mashibing.entity.District;
+import com.mashibing.service.AirService;
+import com.mashibing.util.R;
+import com.mashibing.vo.ResultVO;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * @author 郑大仙丶
+ * @version V1.0.0
+ */
+@RestController
+public class AirController {
+
+    @Autowired
+    private AirService airService;
+
+
+    /**
+     * GET	http://localhost:8080/district/list
+     */
+    @GetMapping("/district/list")
+    public ResultVO districtList(){
+        // 直接查询库中的district表中全部数据
+        List<District> districtList = airService.findDistrictList();
+
+        // 封装返回结果
+        return R.ok(districtList);
+    }
+
+}

src/main/java/com/mashibing/entity/Air.java

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+package com.mashibing.entity;
+
+import java.util.Date;
+
+/**
+ * @author 郑大仙丶
+ * @version V1.0.0
+ */
+public class Air {
+
+    private Integer id;
+
+    private Integer districtId;
+
+    private Date monitorTime;
+
+    private Integer pm10;
+
+    private Integer pm25;
+
+    private Integer monitoringStation;
+
+    private Date lastModifyTime;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public Integer getDistrictId() {
+        return districtId;
+    }
+
+    public void setDistrictId(Integer districtId) {
+        this.districtId = districtId;
+    }
+
+    public Date getMonitorTime() {
+        return monitorTime;
+    }
+
+    public void setMonitorTime(Date monitorTime) {
+        this.monitorTime = monitorTime;
+    }
+
+    public Integer getPm10() {
+        return pm10;
+    }
+
+    public void setPm10(Integer pm10) {
+        this.pm10 = pm10;
+    }
+
+    public Integer getPm25() {
+        return pm25;
+    }
+
+    public void setPm25(Integer pm25) {
+        this.pm25 = pm25;
+    }
+
+    public Integer getMonitoringStation() {
+        return monitoringStation;
+    }
+
+    public void setMonitoringStation(Integer monitoringStation) {
+        this.monitoringStation = monitoringStation;
+    }
+
+    public Date getLastModifyTime() {
+        return lastModifyTime;
+    }
+
+    public void setLastModifyTime(Date lastModifyTime) {
+        this.lastModifyTime = lastModifyTime;
+    }
+}

src/main/java/com/mashibing/entity/District.java

@@ -0,0 +1,36 @@
+package com.mashibing.entity;
+
+/**
+ * @author 郑大仙丶
+ * @version V1.0.0
+ */
+public class District {
+
+    private Integer id;
+
+    private String name;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "District{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                '}';
+    }
+}

src/main/java/com/mashibing/mapper/DistrictMapper.java

@@ -0,0 +1,16 @@
+package com.mashibing.mapper;
+
+import com.mashibing.entity.District;
+import org.apache.ibatis.annotations.Select;
+
+import java.util.List;
+
+/**
+ * @author 郑大仙丶
+ * @version V1.0.0
+ */
+public interface DistrictMapper {
+
+    @Select("select * from district")
+    List<District> findAll();
+}

src/main/java/com/mashibing/service/AirService.java

@@ -0,0 +1,17 @@
+package com.mashibing.service;
+
+import com.mashibing.entity.District;
+
+import java.util.List;
+
+/**
+ * @author 郑大仙丶
+ * @version V1.0.0
+ */
+public interface AirService {
+    /**
+     * 查询区域表的全部信息
+     * @return
+     */
+    List<District> findDistrictList();
+}

src/main/java/com/mashibing/service/impl/AirServiceImpl.java

@@ -0,0 +1,26 @@
+package com.mashibing.service.impl;
+
+import com.mashibing.entity.District;
+import com.mashibing.mapper.DistrictMapper;
+import com.mashibing.service.AirService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+/**
+ * @author 郑大仙丶
+ * @version V1.0.0
+ */
+@Service
+public class AirServiceImpl implements AirService {
+
+    @Autowired
+    private DistrictMapper districtMapper;
+
+    @Override
+    public List<District> findDistrictList() {
+        List<District> districtList = districtMapper.findAll();
+        return districtList;
+    }
+}

src/main/java/com/mashibing/util/R.java

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+package com.mashibing.util;
+
+import com.mashibing.vo.ResultVO;
+
+/**
+ * @author 郑大仙丶
+ * @version V1.0.0
+ */
+public class R {
+
+    public static ResultVO ok(){
+        ResultVO vo = new ResultVO();
+        vo.setCode(0);
+        vo.setMsg("");
+        return vo;
+    }
+
+    public static ResultVO ok(Object data){
+        ResultVO vo = ok();
+        vo.setData(data);
+        return vo;
+    }
+
+}

src/main/java/com/mashibing/vo/ResultVO.java

@@ -0,0 +1,38 @@
+package com.mashibing.vo;
+
+/**
+ * @author 郑大仙丶
+ * @version V1.0.0
+ */
+public class ResultVO {
+
+    private Integer code;
+
+    private String msg;
+
+    private Object data;
+
+    public Integer getCode() {
+        return code;
+    }
+
+    public void setCode(Integer code) {
+        this.code = code;
+    }
+
+    public String getMsg() {
+        return msg;
+    }
+
+    public void setMsg(String msg) {
+        this.msg = msg;
+    }
+
+    public Object getData() {
+        return data;
+    }
+
+    public void setData(Object data) {
+        this.data = data;
+    }
+}

src/main/resources/application.yml

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+spring:
+  datasource:
+    driver-class-name: com.mysql.jdbc.Driver
+    url: jdbc:mysql:///air
+    username: root
+    password: root
+
+
+mybatis:
+  mapper-locations: classpath:mapper/*.xml
+  configuration:
+    # district_id  ==   districtId
+    map-underscore-to-camel-case: true

src/test/java/com/mashibing/mapper/DistrictMapperTest.java

@@ -0,0 +1,25 @@
+package com.mashibing.mapper;
+
+
+import com.mashibing.entity.District;
+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
+public class DistrictMapperTest {
+
+    @Autowired
+    private DistrictMapper districtMapper;
+
+    @Test
+    public void findAll() {
+        List<District> list = districtMapper.findAll();
+        System.out.println(list);
+    }
+}

src/test/java/com/mashibing/service/AirServiceTest.java

@@ -0,0 +1,25 @@
+package com.mashibing.service;
+
+
+import com.mashibing.entity.District;
+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
+public class AirServiceTest {
+
+    @Autowired
+    private AirService airService;
+
+    @Test
+    public void findDistrictList() {
+        List<District> list = airService.findDistrictList();
+        System.out.println(list);
+    }
+}