Android+IDEA后台+MySQL数据库数据交互实战案例（A电脑：Android B电脑：IDEA后台）

目录

一、实现功能：

二、实战部署：

2.1 Android项目详解：

2.1.1 Android定义返回实体类（如是返回基本类型如int String Boolean 等无需建类）

2.1.2 Android定义接口

2.1.3 Android定义配置文件，设置IDEA电脑主机IP（localhost）以及端口号

2.1.4 Android使用Retrofit框架进行网络请求，并使用工具类进行日志拦截

2.1.5 调用接口进行数据请求

2.2 IDEA项目详解

2.2.1 项目结构：

2.2.2 Controller层/DoctortestController.java

2.2.3 dao层/Doctortest.java

2.2.4 mapper层/DoctortestMapper.java

2.2.5 service层/impl/DoctortestServiceImpl.java

2.2.6 service层/IDoctortestService.java

2.2.7 代码生成器Code,修改参数

2.2.8 MybatisPlusConfig

2.2.9 DoctortestMapper.xml

2.2.10 application.properties

2.2.11 依赖pom.xml文件:

3.运行结果

 4.数据库表结构

框架思路：A电脑部署Android项目，B电脑部署IDEA后台，Android向IDEA发送参数M，在IDEA中根据接收参数M对Mysql数据库进行查询处理，将结果（参数N）返回给Android

实战逻辑：Android输入手机号Phone，和密码Password，将两个参数的值传输到IDEA项目，IDEA项目根据手机号查询，如果查询到记录，则返回true表示已注册，如果未查询到记录，则返回false（Android项目code、IDEA项目code、数据库结构以及注意问题 都放进去了）

二、实战部署：

2.1 Android项目详解：

2.1.1 Android定义返回实体类（如是返回基本类型如int String Boolean 等无需建类）

注：由于下面案例返回的是Boolean值，没用上这个实体类，但是返回的是对象类型就需要建一个代码如下（示例）：

2.1.2 Android定义接口

doctortest ：IDEA项目中的Controller层定义的路径，对应下面红框部分

findDoctoByNumber ：IDEA项目中的Controller类中的方法注解路径，如下图

代

package com.hncum.doctortest.dao;


import com.hncum.doctortest.entity.DoctorTest;

import retrofit2.Call;
import retrofit2.http.Field;
import retrofit2.http.FormUrlEncoded;
import retrofit2.http.POST;

//测试 医生端 接口集合
public interface API {


    //医生端登录接口
    @FormUrlEncoded
    @POST("doctortest/findDoctoByNumber")
    Call<Boolean> getDoctor(@Field("doctorPhone") String doctorPhone, @Field("doctorPassword") String doctorPassword);


}

2.1.3 Android定义配置文件，设置IDEA电脑主机IP（localhost）以及端口号

package com.hncum.doctortest;



public class AppDataConfig {


    //使用公网 IP地址  处于统一局域网中
    public static  String localhost = " 公共网络IP地址 ";

    //9000 端口号
    public static String getURL(){
        return  "http://"+localhost+":9000/";
    }
}

注：此处IP地址 需要两部电脑同时连接一个热点之后（最好别用校园网，可以自己开热点），然后在IDEA项目的电脑上打开

设置==》网络和Internet==》WLAN==》第二行点进去 翻到最下面 复制 IPv4地址 对应的IP 放到Android项目中 localhost，切记 需两台电脑连接同一个热点后再复制对应IP地址，而且每次重新连接网络都会更改此地址

2.1.4 Android使用Retrofit框架进行网络请求，并使用工具类进行日志拦截

Retrofit工具类进行日志拦截：

package com.hncum.doctortest;

import android.util.Log;

import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class RetrofitUtils {

    public static Retrofit getRetrofit(String url) {
        //日志显示级别
        HttpLoggingInterceptor.Level level= HttpLoggingInterceptor.Level.BODY;
        //新建log拦截器
        HttpLoggingInterceptor loggingInterceptor=new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
            @Override
            public void log(String message) {
                Log.d("RetrofitMessage","OkHttp====Message:"+message);
            }
        });
        loggingInterceptor.setLevel(level);
        //定制OkHttp
        OkHttpClient.Builder httpClientBuilder = new OkHttpClient
                .Builder();
        //OkHttp进行添加拦截器loggingInterceptor
        httpClientBuilder.addInterceptor(loggingInterceptor);

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(url)
                .addConverterFactory(GsonConverterFactory.create())
                .client( httpClientBuilder.build())
                .build();

        return retrofit;
    }

}

Android添加Retrofit+GSON依赖：

//retrofit+gson+网络请求
implementation("com.squareup.okhttp3:okhttp:4.9.3")
implementation 'com.google.code.gson:gson:2.9.0'

implementation 'com.squareup.retrofit2:retrofit:2.9.0'
implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
implementation 'com.squareup.okhttp3:logging-interceptor:4.9.3'
//retrofit+gson+网络请求

2.1.5 调用接口进行数据请求

package com.hncum.doctortest;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import com.hncum.doctortest.dao.API;
import com.hncum.doctortest.entity.DoctorTest;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class MainActivity extends AppCompatActivity {
    /**
* 进行逻辑处理
* 使用Retrofit框架进行处理：  Retrofit进行接口封装  OkHttp进行网络请求
*/

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        /**
* AppDataConfig.getURL()) 网络请求网址
*/
        API api = RetrofitUtils.getRetrofit(AppDataConfig.getURL()).create(API.class);
        //Boolean 返回值类型

        api.getDoctor("12345","1212").enqueue(new Callback<Boolean>() {
            //请求成功
            @Override
            public void onResponse(Call<Boolean> call, Response<Boolean> response) {
                System.out.println("已成功请求");
                System.out.println(response.body()+"请求成功");
            }

            //请求失败后
            @Override
            public void onFailure(Call<Boolean> call, Throwable t) {
                System.out.println("请求失败");
                //返回错误信息
                System.out.println(t.getMessage());
            }
        });
        
    }
}

2.2 IDEA项目详解

2.2.1 项目结构：

2.2.2 Controller层/DoctortestController.java

package com.example.doctortestmodel.controller;


import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.example.doctortestmodel.dao.Doctortest;
import com.example.doctortestmodel.service.IDoctortestService;
import io.swagger.annotations.Api;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 *  前端控制器
 * </p>
 * @since 2022-11-05
 */
@RestController
@CrossOrigin
@Api(tags = "DoctortestController医生登陆控制器")
@RequestMapping("/doctortest")
public class DoctortestController {

    @Autowired
    IDoctortestService iDoctortestService;
    
    /**
     *
     * @param phone_number
     * @param doctorPassword
     * @return Boolean
     */
    @PostMapping("findDoctoByNumber")
    private Boolean findDoctoByNumber(@RequestParam(name = "doctorPhone") String phone_number,
                                      @RequestParam(name = "doctorPassword") String doctorPassword) {
        QueryWrapper<Doctortest> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("doctorPhone", phone_number);
        List<Doctortest> list = new ArrayList<>();
        System.out.println(111);
        list = iDoctortestService.getBaseMapper().selectList(queryWrapper);
        if(list.size()!=1)
            return false;
        if(list.get(0).getDoctorPassword().equals(doctorPassword))
            return true;
        return false;
    }
}

2.2.3 dao层/Doctortest.java

package com.example.doctortestmodel.dao;

import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import io.swagger.annotations.ApiModel;
import lombok.Data;

import java.io.Serializable;


/**
 * <p>
 * 
 * </p>
 * @since 2022-11-05
 */
@Data
@ApiModel(value = "Doctortest对象", description = "")
@TableName("doctortest")
public class Doctortest implements Serializable {

    private static final long serialVersionUID = 1L;

    @TableId(value = "doctorPhone")
    private String doctorPhone;

    @TableField(value="doctorPassword")
    private String doctorPassword;


    public String getDoctorPhone() {
        return doctorPhone;
    }

    public void setDoctorPhone(String doctorPhone) {
        this.doctorPhone = doctorPhone;
    }

    public String getDoctorPassword() {
        return doctorPassword;
    }

    public void setDoctorPassword(String doctorPassword) {
        this.doctorPassword = doctorPassword;
    }

    @Override
    public String toString() {
        return "Doctortest{" +
        "doctorPhone=" + doctorPhone +
        ", doctorPassword=" + doctorPassword +
        "}";
    }
}

2.2.4 mapper层/DoctortestMapper.java

package com.example.doctortestmodel.mapper;



import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.doctortestmodel.dao.Doctortest;
import org.apache.ibatis.annotations.Mapper;

/**
 * <p>
 *  Mapper 接口
 * </p>
 *
 * @author yqifei
 * @since 2022-11-05
 */
@Mapper
public interface DoctortestMapper extends BaseMapper<Doctortest> {

}

2.2.5 service层/impl/DoctortestServiceImpl.java

package com.example.doctortestmodel.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.doctortestmodel.dao.Doctortest;
import com.example.doctortestmodel.mapper.DoctortestMapper;
import com.example.doctortestmodel.service.IDoctortestService;
import org.springframework.stereotype.Service;


/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author yqifei
 * @since 2022-11-05
 */
@Service
public class DoctortestServiceImpl extends ServiceImpl<DoctortestMapper, Doctortest> implements IDoctortestService {

}

2.2.6 service层/IDoctortestService.java

package com.example.doctortestmodel.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.example.doctortestmodel.dao.Doctortest;


/**
 * <p>
 *  服务类
 * </p>
 *
 * @author yqifei
 * @since 2022-11-05
 */
public interface IDoctortestService extends IService<Doctortest> {

}

2.2.7 代码生成器Code,修改参数

package com.example.doctortestmodel.utils;


import com.baomidou.mybatisplus.generator.FastAutoGenerator;
import com.baomidou.mybatisplus.generator.config.OutputFile;

import java.util.Collections;

public class GenerateCode {
    public static void main(String[] args) {
        FastAutoGenerator.create("jdbc:mysql://1.117.225.144:3306/renren_security?serverTimezone=UTC", "root", "83f67c3ec322f2b0")
                .globalConfig(builder -> {
                    builder.author(" ") // 设置作者
                            .enableSwagger() // 开启 swagger 模式
                            .fileOverride() // 覆盖已生成文件
                            .outputDir("D://data//"); // 指定输出目录
                })
                .packageConfig(builder -> {
                    builder.parent("com.example_login.demo") // 设置父包名
//                            .moduleName("idcard") // 设置父包模块名
                            .pathInfo(Collections.singletonMap(OutputFile.mapperXml, "D://data//")); // 设置mapperXml生成路径
                })
                .strategyConfig(builder -> {
                    builder.addInclude("doctortest") // 设置需要生成的表名
                            .addTablePrefix("t_", "c_"); // 设置过滤表前缀
                })
//                .templateEngine(new FreemarkerTemplateEngine()) // 使用Freemarker引擎模板，默认的是Velocity引擎模板
                .execute();

    }
}

2.2.8 MybatisPlusConfig

package com.example.doctortestmodel.utils;


import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MybatisPlusConfig {
    @Bean
    public PaginationInterceptor paginationInnerInterceptor(){
        return new PaginationInterceptor();
    }
}

DoctorTestModelApplication

package com.example.doctortestmodel;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DoctorTestModelApplication {

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

}

2.2.9 DoctortestMapper.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.huncm.com.example_login.demo.mapper.DoctortestMapper">

</mapper>

2.2.10 application.properties

# åºç¨å称
spring.application.name=DoctorTestModel
# åºç¨æå¡ WEB 访é®ç«¯å£
server.port=9000
#ä¸é¢è¿äºå容æ¯ä¸ºäºè®©MyBatisæ å°
#æå®MybatisçMapperæ件
mybatis.mapper-locations=classpath:mappers/*xml
#æå®Mybatisçå®ä½ç®å½
mybatis.type-aliases-package=com.example.doctortestmodel.DoctorTestModelApplication
# æ°æ®åºé©±å¨ï¼
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
# æ°æ®æºå称
spring.datasource.name=defaultDataSource
# æ°æ®åºè¿æ¥å°å
# localhost 对应连接热点后的IP地址 3306为端口号   renren_security 数据库名
spring.datasource.url=jdbc:mysql://localhost:3306/renren_security?serverTimezone=UTC

# æ°æ®åºç¨æ·å&å¯ç ï¼
spring.datasource.username=root
spring.datasource.password=83f67c3ec322f2b0

#  å¤è·¯å¾éç½®
spring.resources.static-locations=file:/home/dachuang
# å¼å¯æ¥å¿
logging.level.com.hnucm.xiaotang = debug
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl

spring.servlet.multipart.max-request-size=200MB
spring.servlet.multipart.max-file-size=200MB

2.2.11 依赖pom.xml文件:

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.example</groupId>
    <artifactId>DoctorTestModel</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>DoctorTestModel</name>
    <description>DoctorTestModel</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.3.7.RELEASE</spring-boot.version>
    </properties>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--  swagger start-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>3.0.0</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger-ui -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>3.0.0</version>
        </dependency>

        <!--  swagger end-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.5.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>2.2</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.24</version>
            <!--     对应自己的数据库版本     -->
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.7.RELEASE</version>
                <configuration>
                    <mainClass>com.example.doctortestmodel.DoctorTestModelApplication</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

3.运行结果

3.1 两个项目部署好之后即可运行，IDEA项目运行后，Android发起请求并打印输出结果

3.2 在写好IDEA项目后，可用APIFOX进行调试，测试接口是否正确返回数据（APIFOX在线调试工具，可看这一篇 APIFOX在线调试工具 有图有实例）

3.3 如若Android项目显示连接超时，请关掉两台电脑主机的公网防火墙

 4.数据库表结构

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