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前言:
模拟用户登录,从安卓发送请求到服务端校验,再从服务端返回给安卓校验结果
在AndroidManifest.xml文件中添加网络权限
<uses-permission android:name="android.permission.INTERNET"/>
所放位置如图所示:
2.添加依赖,在app模块下的build.gradle中添加okhttp和json的依赖
implementation group: 'com.squareup.okhttp3', name: 'okhttp', version: '4.9.0'implementation 'com.alibaba:fastjson:1.2.10'
添加位置如图所示,添加之后点击进行编译引入。
3.封装一个实体类,用于接收请求后的响应信息。(响应,包括响应码code和响应体body)
public class ResponseBody { private String code;//响应码 private Object result;//响应体 public String getCode() { return code; } public void setCode(String code) { this.code = code; } public Object getResult() { return result; } public void setResult(Object result) { this.result = result; }}
封装一个实体类(User)
public class User { private int id; private String username; private String password; private String phone; private String name; private String sex; public int getId() { return id; } public void setId(int id) { this.id = id; } 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; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; }}
5.定义OkHttp工具,包括get,post两种请求方式
import androidx.annotation.NonNull;import com.alibaba.fastjson.JSONObject;import java.io.IOException;import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Map;import java.util.Set;import okhttp3.Cookie;import okhttp3.CookieJar;import okhttp3.FormBody;import okhttp3.HttpUrl;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.Response; public class OkHttpUtils { private static final String BASE_URL = "http://192.168.10.104:8080/"; //地址 private static OkHttpClient client = new OkHttpClient(); private static ResponseBody responseBody; public OkHttpUtils(){ final Map<String, List<Cookie>> cookieStore=new HashMap<>(); client=new OkHttpClient.Builder().cookieJar(new CookieJar() { @Override public void saveFromResponse(@NonNull HttpUrl httpUrl, @NonNull List<Cookie> list) { cookieStore.put(httpUrl.host(),list); } @NonNull @Override public List<Cookie> loadForRequest(@NonNull HttpUrl httpUrl) { List<Cookie> cookies=cookieStore.get(httpUrl.host()); return cookies==null?new ArrayList<>():cookies; } }).build(); } public static ResponseBody get(String url) { Request request = new Request.Builder().url(getAbsoluteUrl(url)).build(); Response response = null; try { response = client.newCall(request).execute(); responseBody= dealResponse(response.body().string()); } catch (IOException e) { e.printStackTrace(); } return responseBody; } public static ResponseBody post(String url, Map<String,Object> value) { FormBody formBody=dealFormBody(value); Request request = new Request.Builder().url(getAbsoluteUrl(url)).post(formBody).build(); Response response; try { response = client.newCall(request).execute(); responseBody= dealResponse(response.body().string()); } catch (IOException e) { e.printStackTrace(); } return responseBody; } public static ResponseBody dealResponse(String result){ ResponseBody responseBody=new ResponseBody(); JSONObject json = JSONObject.parseObject(result); responseBody.setCode(json.get("code")+""); responseBody.setResult(json.get("data")); return responseBody; } public static FormBody dealFormBody(Map<String, Object> maps){ FormBody.Builder builder = new FormBody.Builder(); Set<String> keySet=maps.keySet(); for(Iterator<String> iterator = keySet.iterator(); iterator.hasNext();) { String key=iterator.next(); builder.add(key, maps.get(key)+""); } return builder.build(); } private static String getAbsoluteUrl(String relativeUrl) { return BASE_URL + relativeUrl; }}
定义好之后,测试访问
我在MainActivity中添加按钮进行的测试,具体界面就不一一介绍了,测试代码如下:
import android.os.Bundle;import android.view.View;import android.widget.Button;import androidx.appcompat.app.AppCompatActivity;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONArray;import com.alibaba.fastjson.JSONObject;import java.util.HashMap;import java.util.Map;import okhttp3.OkHttpClient;public class MainActivity extends AppCompatActivity { private OkHttpClient okHttpClient; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button login= findViewById(R.id.login);//为界面上的按钮设置监听事件,点击就会调用下面的test方法 login.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { test(); } }); } public void test(){ new Thread(()-> { String url="user/info/getUser"; Map<String,Object> maps=new HashMap<>();//将请求参数添加到map中 maps.put("username","zhangsan"); maps.put("password","123456"); ResponseBody result=OkHttpUtils.post(url,maps);//传url参数和map System.out.println(result.getCode()); User user= dealJsonToObject(result); System.out.println(result.getResult()); System.out.println(user.getPhone()); }).start(); } //处理json到实体类public User dealJsonToObject(ResponseBody result){ JSONArray arr= (JSONArray) JSONArray.parse(result.getResult().toString()); JSONObject jsonObject = arr.getJSONObject(0); User user = JSON.toJavaObject(jsonObject,User.class); return user;}}
服务器是由java编写
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