复制代码 代码如下:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.NameValuePair;
import org.apache.commons.httpclient.cookie.CookiePolicy;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;

public class TestHttpClient {

public static void main(String[] args) {
// TODO Auto-generated method stub
//定义httpClient的实例
HttpClient httpclient = new HttpClient();

//创建get方法的实例
GetMethod getMethod = new GetMethod("http://jb51.net");
//使用系统提供的默认恢复策略
//getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());



//创建post方法实例
PostMethod postMethod = new UTF8PostMethod("http://jb51.net");
//
////填入各个表单域的值
//NameValuePair[] data = {new NameValuePair("user_name", "user_name"),new NameValuePair("password","password")};
//
////将表单的值放入到post方法中
//postMethod.setRequestBody(data);
//
//postMethod.getParams().setParameter(
//"http.protocol.cookie-policy",CookiePolicy.BROWSER_COMPATIBILITY);
//postMethod.setRequestHeader("Referer", "http://jb51.net");
try{
//执行GET方法
//int statusCode = httpclient.executeMethod(getMethod);

//执行post方法
int statusCode = httpclient.executeMethod(postMethod);
if(statusCode == HttpStatus.SC_MOVED_TEMPORARILY){
Header locationHeader = postMethod.getResponseHeader("Location");
String location = null;
if(locationHeader != null){
location = locationHeader.getValue();
}
postMethod = new PostMethod(location);
postMethod.setRequestHeader("Referer", "http://jb51.net/login");
NameValuePair[] data1 = {new NameValuePair("user_name", "user_name"),new NameValuePair("password","password")};
postMethod.setRequestBody(data1);
postMethod.getParams().setParameter(
"http.protocol.cookie-policy",CookiePolicy.BROWSER_COMPATIBILITY);
int statusCode1 = httpclient.executeMethod(postMethod);
if(statusCode1 != HttpStatus.SC_OK){
System.out.println("Method is wrong " + postMethod.getStatusLine());
}
}
if(statusCode != HttpStatus.SC_OK){
System.out.println("Method is wrong " + postMethod.getStatusLine());
}
InputStream responseBody = postMethod.getResponseBodyAsStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(responseBody,"utf-8"));
String line = reader.readLine();
while(line != null){
System.out.println(new String(line.getBytes()));
line = reader.readLine();
}

}
catch (HttpException e) {
// TODO: handle exception
System.out.println("Please check your provided http address!");
e.printStackTrace();
}catch (IOException e) {
// TODO: handle exception
System.out.println("the line is wrong!");
e.printStackTrace();
}finally{
getMethod.releaseConnection();//释放链接
postMethod.releaseConnection();
}
}
//Inner class for UTF-8 support
public static class UTF8PostMethod extends PostMethod{
public UTF8PostMethod(String url){
super(url);
}
@Override
public String getRequestCharSet() {
//return super.getRequestCharSet();
return "UTF-8";
}
}

}