java客户端post与get请求

本是古典何须时尚 2022-07-13 08:48 186阅读 0赞

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

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;
 
 /**
 * 
 * 
 * Title:HttpTookitEnhance
 * Description: httpclient模拟http请求，解决返回内容乱码问题
 * Copyright: Copyright (c) 2010
 * Company: 
 * @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);
 }
 
 }