android中与web端的简单登录数据实现（AsyncHttpClient）

我们先在web端就是服务端先写个简单的登录  当然我这的判断只是简单的判断了一下

login.jsp界面：

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>







	
登录页面
	

		用户名：

		密码：

		

	

servlet 类 

package com.zking.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginServlet extends HttpServlet{

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		// TODO Auto-generated method stub
		//super.doGet(req, resp);
		req.setCharacterEncoding("UTF-8");
		resp.setContentType("text/html; charset=UTF-8");
		//获取用户名和密码
		String uname=req.getParameter("uname");
		String upass=req.getParameter("upass");
		System.out.println(uname+" "+upass);
		String result=null;
		//判断
		if("admin".equals(uname)&&"123".equals(upass)){
			result="成功";
		}else{
			result="失败";
		}
		PrintWriter pw=resp.getWriter();
		pw.write(result);
		pw.close();
		
	}
	
}

需要配置下web.xml

  G160628_32servlet
  
    index.html
    index.htm
    index.jsp
    default.html
    default.htm
    default.jsp
  
  
      loginServlet
      com.zking.servlet.LoginServlet
  
  
  
      loginServlet
      /login.do
  
  

然后简单的可以在Tomcat中实现登录

但是我们要它的数据提交到Android中， 当然我们这用到了第三方AsyncHttpClient

所以要导入一个架包

然后在build.gradle中  加上一句useLibrary 'org.apache.http.legacy'   原因是怕HttpClient导致不可以用

然后Android中的布局文件activity_main.xml

MainActivity.java

path里面的路径是你在网站中利用Tomcat运行的网站  当然我们一般会把网址中的localhost改成自己在dos命令中打上ipconfig然后复制ipv4的地址。

package com.example.g160628_android32_commitdata;

import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.RequestParams;
import com.loopj.android.http.TextHttpResponseHandler;

import org.apache.http.Header;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class MainActivity extends AppCompatActivity {

    private EditText et_main_uname;
    private EditText et_main_upass;

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

        et_main_uname = (EditText) findViewById(R.id.et_main_uname);
        et_main_upass = (EditText) findViewById(R.id.et_main_upass);
    }
    public void loginAsyncHttpClient(View view){
        String uname=et_main_uname.getText().toString();
        String upass=et_main_upass.getText().toString();
        String path="http://172.25.49.1:7788/G160628_32servlet/login.do";

        AsyncHttpClient ahc=new AsyncHttpClient();
        RequestParams params=new RequestParams();
        params.put("uname",uname);
        params.put("upass",upass);
        ahc.post(this,path,params,new TextHttpResponseHandler(){
            @Override
            public void onFailure(String responseBody, Throwable error) {
                super.onFailure(responseBody, error);
            }
            @Override
            public void onSuccess(int statusCode, Header[] headers, String responseBody) {
                super.onSuccess(statusCode, headers, responseBody);
                Toast.makeText(MainActivity.this, responseBody, Toast.LENGTH_SHORT).show();
            }
        });


    }
        

}

最后可以看到你想要的效果了。