Android使用okhttp框架实现带参数Get和Post请求（附服务端完整代码）

由于工作需求，我从一个Java服务端开发人员转到了Android客户端，这篇博客的服务器端只是简单的写了个servlet，没有用框架。服务端没有连接数据库，实现了一个伪登陆。

服务端代码结构

Android使用okhttp框架实现带参数Get和Post请求（附服务端完整代码）_第1张图片

web.xml

  Archetype Created Web Application        LoginServlet    com.it.Servlet.LoginServlet        LoginServlet    /login.action

LoginServlet

package com.it.Servlet;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;public class LoginServlet extends HttpServlet {    @Override    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        //super.doGet(req, resp);        resp.setContentType("text/html;charset=utf-8");        resp.setHeader("content-type", "text/html;charset=utf-8");        String username = req.getParameter("username");        String password = req.getParameter("password");        System.out.println(username);        System.out.println(password);        if (username.equals("ycy")&password.equals("123")){            resp.getWriter().print("登陆成功");        }else {            resp.getWriter().print("登陆失败");        }    }    @Override    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        //super.doPost(req, resp);        doGet(req,resp);    }}

Android客户端，getTask.java这个是我用原生http写的，没有用上！！

Android使用okhttp框架实现带参数Get和Post请求（附服务端完整代码）_第2张图片

在build.gradle 里面添加jar包

 implementation 'com.squareup.okhttp3:okhttp:3.1.0'

在AndroidManifest.xml里面添加权限

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

MainActivity.java

package com.it;import android.content.DialogInterface;import android.os.Looper;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.EditText;import android.widget.Toast;import java.io.IOException;import okhttp3.Call;import okhttp3.Callback;import okhttp3.FormBody;import okhttp3.HttpUrl;import okhttp3.MultipartBody;import okhttp3.OkHttpClient;import okhttp3.Request;import okhttp3.RequestBody;import okhttp3.Response;public class MainActivity extends AppCompatActivity {    private EditText username;    private EditText pwd;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        username =  findViewById(R.id.username);        pwd =  findViewById(R.id.password);    }    //Get请求    public void LoginGet(View view){        String name=username.getText().toString();        String password=pwd.getText().toString();        String path="http://192.168.43.227:8080/demo_android/login.action?username="+name+"&password="+password;        System.out.println(path);        System.out.println("用户名："+name);        System.out.println("密码："+password);        OkHttpClient client =new OkHttpClient();        Request request=new Request.Builder().url(path).get().build();        client.newCall(request).enqueue(new Callback() {            //失败            @Override            public void onFailure(Call call, IOException e) {                Log.d("MainActivity","连接失败"+e.getLocalizedMessage());            }            //成功            @Override            public void onResponse(Call call, Response response) throws IOException {              String  result = response.body().string();                Log.d("MainActivity",result);                if (response.body()!=null){                    response.body().close();                }            }        });    }    //Post请求    public void LoginPost(View view){        String name=username.getText().toString();        String password=pwd.getText().toString();        String url="http://192.168.43.227:8080/demo_android/login.action";        OkHttpClient client=new OkHttpClient();        //构建表单参数        FormBody.Builder requestBuild=new FormBody.Builder();        //添加请求体        RequestBody requestBody=requestBuild                    .add("username",name)                    .add("password",password)                    .build();        Request request=new Request.Builder()                .url(url)                .post(requestBody)                .build();        System.out.println(request.toString());        //异步请求        client.newCall(request).enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {                Log.d("MainActivityPost","连接失败"+e.getLocalizedMessage());            }            @Override            public void onResponse(Call call, Response response) throws IOException {                String  result = response.body().string();                Log.d("MainActivity",result);                if (response.body()!=null){                    response.body().close();                }            }        });    }}

最终效果

客户端后台：

Android使用okhttp框架实现带参数Get和Post请求（附服务端完整代码）_第3张图片

Android使用okhttp框架实现带参数Get和Post请求（附服务端完整代码）_第4张图片

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