android客户端与javaweb服务器端数据通信-Post-Json格式数据
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2022-03-15 22:26:17
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客户端
package com.example.z_t.mytest3;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.google.gson.Gson;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserFactory;
import java.io.IOException;
import java.io.StringReader;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;
public class FirstActivity extends AppCompatActivity {
private EditText username;
private EditText password;
private String uname;
private String pwd;
private String result;
private boolean res;
public static final MediaType JSON=MediaType.parse("application/json; charset=utf-8");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
username = (EditText)findViewById(R.id.username);
password = (EditText)findViewById(R.id.password);
Button button = (Button)findViewById(R.id.login);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
uname = username.getText().toString();
pwd = password.getText().toString();
Log.i("First", uname);
Log.i("First", pwd);
// getHttp(uname,pwd, new Callback() {
// @Override
// public void onFailure(Call call, IOException e) {
//
// }
//
// @Override
// public void onResponse(Call call, Response response) throws IOException {
// String responseData = response.body().string();
// int ii =responseData.length();
// Log.i("First", responseData);
// Log.i("First", String.valueOf(ii));
// if (responseData.equals("true")){
// res=true;
// }else {
// res=false;
// }
// Log.i("First", String.valueOf(res));
// runOnUiThread(new Runnable() {
// @Override
// public void run() {
// if (res){
// Toast.makeText(FirstActivity.this, "请求成功", Toast.LENGTH_SHORT).show();
// Intent intent = new Intent(FirstActivity.this,SecondActivity.class);
// startActivity(intent);
// }else {
// Toast.makeText(FirstActivity.this, "请求失败", Toast.LENGTH_SHORT).show();
// }
// }
// });
// }
// });
// postHttp(uname, pwd, new Callback() {
// @Override
// public void onFailure(Call call, IOException e) {
//
// }
//
// @Override
// public void onResponse(Call call, Response response) throws IOException {
// String responseData = response.body().string();
// int ii =responseData.length();
// Log.i("First", responseData);
// Log.i("First", String.valueOf(ii));
// if (responseData.equals("true")){
// res=true;
// }else {
// res=false;
// }
// Log.i("First", String.valueOf(res));
// runOnUiThread(new Runnable() {
// @Override
// public void run() {
// if (res){
// Toast.makeText(FirstActivity.this, "请求成功", Toast.LENGTH_SHORT).show();
// Intent intent = new Intent(FirstActivity.this,SecondActivity.class);
// startActivity(intent);
// }else {
// Toast.makeText(FirstActivity.this, "请求失败", Toast.LENGTH_SHORT).show();
// }
// }
// });
//
// }
// });
postJsonHttp(uname, pwd, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
String responseData = response.body().string();
int ii =responseData.length();
Log.i("First", responseData);
Log.i("First", String.valueOf(ii));
if (responseData.equals("true")){
res=true;
}else {
res=false;
}
Log.i("First", String.valueOf(res));
runOnUiThread(new Runnable() {
@Override
public void run() {
if (res){
Toast.makeText(FirstActivity.this, "请求成功", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(FirstActivity.this,SecondActivity.class);
startActivity(intent);
}else {
Toast.makeText(FirstActivity.this, "请求失败", Toast.LENGTH_SHORT).show();
}
}
});
}
});
}
});
}
private void getHttp(String username,String password,okhttp3.Callback callback) {
OkHttpClient client = new OkHttpClient();
String url = "http://192.168.150.1:8080/test2/login?name="+username+"&pwd="+password;
Log.i("First", url);
Request request = new Request.Builder()
.url(url)
.method("GET",null)
.build();
Call call = client.newCall(request);
call.enqueue(callback);
}
private String parseXMLWithPull(String xmlData) {
try{
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
XmlPullParser xmlPullParser = factory.newPullParser();
xmlPullParser.setInput(new StringReader(xmlData));
int eventType = xmlPullParser.getEventType();
while (eventType!=XmlPullParser.END_DOCUMENT){
String nodeName = xmlPullParser.getName();
switch (eventType){
case XmlPullParser.START_TAG:{
if ("td".equals(nodeName)){
result = xmlPullParser.nextText();
}
break;
}
case XmlPullParser.END_TAG:{
if ("tr".equals(nodeName)){
Log.i("First",result);
}
}
default:break;
}
eventType = xmlPullParser.next();
}
}catch (Exception e){
e.printStackTrace();
}
return result;
}
private void postHttp(String username,String password,okhttp3.Callback callback){
OkHttpClient client = new OkHttpClient();
RequestBody body = new FormBody.Builder()
.add("username",username)
.add("password",password)
.build();
Request request = new Request.Builder()
.url("http://192.168.150.1:8080/test2/login")
.post(body)
// .addHeader("content-type","multipart/form-data")
.build();
Call call = client.newCall(request);
call.enqueue(callback);
}
private void postJsonHttp(String username,String password,okhttp3.Callback callback){
OkHttpClient client = new OkHttpClient();
User user = new User();
user.setUsername(username);
user.setPassword(password);
Gson gson = new Gson();
String json = gson.toJson(user);//使用Gson将对象转换为json字符串
Log.i("First", json);
// RequestBody body = RequestBody.create(JSON,json);
RequestBody body = RequestBody.create(MediaType.parse("application/json; charset=utf-8"),json);
Request request = new Request.Builder()
.url("http://192.168.150.1:8080/test2/login")
.post(body)
.build();
Call call = client.newCall(request);
call.enqueue(callback);
}
}
服务器端
package servlet;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSON;
import net.sf.json.JSONObject;
/**
* Servlet implementation class login
*/
@WebServlet("/login")
public class login extends HttpServlet {
private String name=null;
private String pwd=null;
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public login() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
name=request.getParameter("name");
pwd=request.getParameter("pwd");
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
System.out.println("name:"+name+" pwd:"+pwd);
System.out.println(name.length());
if(("admin").equals(name)&&("admin").equals(pwd)){
System.out.println("true");
out.print("true");
}else{
System.out.print("false");
out.print("false");
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
// response.setContentType("text/html");
// response.setCharacterEncoding("utf-8");
//
// name = request.getParameter("username");
// pwd = request.getParameter("password");
// System.out.println("name:"+name+" pwd:"+pwd);
// System.out.println(name.length());
//
// PrintWriter out = response.getWriter();
//
// if(("admin").equals(name)&&("admin").equals(pwd)){
// System.out.println("true");
// out.print("true");
//
// }else{
// System.out.print("false");
// out.print("false");
// }
String jsonString = getRequestBody(request);
System.out.println(jsonString);
JSONObject jsonObj = JSONObject.fromObject(jsonString);
System.out.println(jsonObj);
pwd = jsonObj.getString("password").toString();
name = jsonObj.getString("username");
System.out.println("name:"+name+" pwd:"+pwd);
System.out.println(jsonObj.getString("username"));
System.out.println(name.length());
PrintWriter out = response.getWriter();
if(("admin").equals(name)&&("admin").equals(pwd)){
System.out.println("true");
out.print("true");
}else{
System.out.print("false");
System.out.print("ff");
out.print("false");
}
// String jsonStr = "{\"password\":\"\",\"username\":\"张三\"}";
// System.out.println(jsonStr);
// JSONObject jsonObj2 = JSONObject.fromString(jsonStr);
// String uu = jsonObj2.getString("username");
// String pp = jsonObj2.optString("password");
// System.out.println(uu);
// System.out.println(pp);
}
}
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