java模拟http get和post 提交

使用httpclient工具包commons-httpclient-3.1.jar，依赖commons-logging-1.0.4.jar和commons-codec-1.3.jar。

Java代码








import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Map;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.URIException;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.apache.commons.httpclient.util.URIUtil;

/**
*
*
* <p>Title:HttpTookitEnhance</p>
* <p>Description: httpclient模拟http请求，解决返回内容乱码问题</p>

* <p>Copyright: Copyright (c) 2010</p>
* <p>Company: </p>
* @author libin
* @version 1.0.0
*/
public class HttpTookitEnhance
{
/**
* 执行一个HTTP GET请求，返回请求响应的HTML
*
* @param url 请求的URL地址
* @param queryString 请求的查询参数,可以为null
* @param charset 字符集
* @param pretty 是否美化
* @return 返回请求响应的HTML
*/
public static String doGet ( String url, String queryString, String charset, boolean pretty )
{
StringBuffer response = new StringBuffer();
HttpClient client = new HttpClient();
HttpMethod method = new GetMethod(url);
try
{
if ( queryString != null && !queryString.equals("") )
//对get请求参数做了http请求默认编码，好像没有任何问题，汉字编码后，就成为%式样的字符串

method.setQueryString(URIUtil.encodeQuery(queryString));
client.executeMethod(method);
if ( method.getStatusCode() == HttpStatus.SC_OK )
{
BufferedReader reader = new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream(), charset));
String line;
while ( ( line = reader.readLine() ) != null )
{
if ( pretty )
response.append(line).append(System.getProperty("line.separator"));
else
response.append(line);
}
reader.close();
}
}
catch ( URIException e )
{
}
catch ( IOException e )
{
}
finally
{
method.releaseConnection();
}
return response.toString();
}

/**
* 执行一个HTTP POST请求，返回请求响应的HTML
*
* @param url 请求的URL地址
* @param params 请求的查询参数,可以为null
* @param charset 字符集
* @param pretty 是否美化
* @return 返回请求响应的HTML
*/
public static String doPost ( String url, Map<String, String> params, String charset, boolean pretty )
{
StringBuffer response = new StringBuffer();
HttpClient client = new HttpClient();
HttpMethod method = new PostMethod(url);
//设置Http Post数据
if ( params != null )
{
HttpMethodParams p = new HttpMethodParams();
for ( Map.Entry<String, String> entry : params.entrySet() )
{
p.setParameter(entry.getKey(), entry.getValue());
}
method.setParams(p);
}
try
{
client.executeMethod(method);
if ( method.getStatusCode() == HttpStatus.SC_OK )
{
BufferedReader reader = new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream(), charset));
String line;
while ( ( line = reader.readLine() ) != null )
{
if ( pretty )
response.append(line).append(System.getProperty("line.separator"));
else
response.append(line);
}
reader.close();
}
}
catch ( IOException e )
{
}
finally
{
method.releaseConnection();
}
return response.toString();
}

public static void main ( String [] args )
{
String y = doGet("http://video.sina.com.cn/life/tips.html", null, "GBK", true);
System.out.println(y);
}

}