HttpClient 登陆后，进行访问数据

 

package com.ch2;

import java.io.ByteArrayInputStream;
import java.io.InputStream;

import org.apache.commons.httpclient.Cookie;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.cookie.CookiePolicy;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.io.IOUtils;

public class HttpClientLogin {

    public static void main(String[] args){
        //登陆 Url
        String loginUrl = "http://localhost:8080/test/web/login.do";
 
        //需登陆后访问的 Url
        String dataUrl = "http://localhost:8080/test/web/getWorklist.do";
 
        HttpClient httpClient = new HttpClient();
 
        //模拟登陆，按实际服务器端要求选用 Post 或 Get 请求方式
        PostMethod postMethod = new PostMethod(loginUrl);
 
        //设置登陆时要求的信息，一般就用户名和密码，验证码自己处理了
        NameValuePair[] data = {
                new NameValuePair("name", "aa"),
                new NameValuePair("password", "password")
        };
        //{    "name": "aa",     "password": "password"}
        //postMethod.setRequestBody(data);
 
      //向服务器写json
        String json="{\"name\": \"aa\",     \"password\": \"password\"}";
        InputStream   inputStream   =   new   ByteArrayInputStream(json.getBytes());
        postMethod.setRequestBody(inputStream);
        try {
            //设置 HttpClient 接收 Cookie,用与浏览器一样的策略
            httpClient.getParams().setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY);
            httpClient.executeMethod(postMethod);
 
            //获得登陆后的 Cookie
            Cookie[] cookies=httpClient.getState().getCookies();
            String tmpcookies= "";
            for(Cookie c:cookies){
                tmpcookies += c.toString()+";";
            }
 
            //进行登陆后的操作
            PostMethod getMethod = new UTF8PostMethod(dataUrl);
 
            //每次访问需授权的网址时需带上前面的 cookie 作为通行证
            getMethod.setRequestHeader("cookie",tmpcookies);
 
            //你还可以通过 PostMethod/GetMethod 设置更多的请求后数据
            //例如，referer 从哪里来的，UA 像搜索引擎都会表名自己是谁，无良搜索引擎除外
            postMethod.setRequestHeader("Referer", "http://unmi.cc");
            postMethod.setRequestHeader("User-Agent","Unmi Spot");
 
            httpClient.executeMethod(getMethod);
 
            //打印出返回数据，检验一下是否成功
            InputStream in=getMethod.getResponseBodyAsStream();
            //System.out.println(IOUtils.toString(in,"UTF-8"));

            String a=IOUtils.toString(in,"UTF-8");
            System.out.println(a);
        } catch (Exception e) {
            e.printStackTrace();
        }  
    }
   
    private static class UTF8PostMethod extends PostMethod{
        public UTF8PostMethod(String url){
            super(url);
        }
       
        @Override
        public String getRequestCharSet() {
            //return super.getRequestCharSet();
            return "UTF-8";
        }
    }
}