Java跨域请求操作---封装类

跨域请求，顾名思义，就是一个站点中的资源去访问另外一个不同域名站点上的资源。 资源可以是一个请求,或一个操作或一个数据流等

(一) 封装类一

 

 

publicclass HttpClientUtil {

publicstatic String transboundaryRequest(String url, String params)throwsHttpException, IOException {

//请求方法

String response=new String();

HttpClient client =new HttpClient();

//解决乱码问题

client.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"UTF-8");

PostMethod method =new PostMethod(ObjectUtils.toString(url));

String[] paramList = params.split("&");

for (int i = 0; i < paramList.length; i++) {

String[] param = paramList[i].split("=");

if(param[0]!=""){

if(param.length>1){

method.addParameter(param[0],ObjectUtils.toString(param[1]));

}else{

method.addParameter(param[0],"");

}

}

}

client.executeMethod(method);

response = method.getResponseBodyAsString();

return response;

}

}

 

 

(二)封装类二

 

package com.gzedu.util;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.util.Iterator;

import java.util.Map;

import java.util.Map.Entry;

import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;

import org.apache.commons.httpclient.HttpClient;

import org.apache.commons.httpclient.HttpException;

import org.apache.commons.httpclient.methods.GetMethod;

import org.apache.commons.httpclient.methods.PostMethod;

import org.apache.commons.httpclient.methods.StringRequestEntity;

import org.apache.commons.httpclient.params.HttpMethodParams;

publicclass HttpClientUtils {

privatestatic Integer SC_OK = 200;

@SuppressWarnings("unchecked")

publicstatic String doHttpGet(String url, Map params,int timeout, String encode) {

String responseMsg ="";

HttpClient httpClient =new HttpClient();

httpClient.getParams().setContentCharset(encode);

StringBuffer sb =new StringBuffer();

if (params !=null && !params.isEmpty()) {

Iterator iterator = params.entrySet().iterator();

while (iterator.hasNext()) {

Entry entry = (Entry) iterator.next();

sb.append(entry.getKey().toString() +"="

+ entry.getValue().toString() +"&");

}

url = url +"?" + sb.substring(0, sb.length()-1);

}

GetMethod getMethod =new GetMethod(url);

getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,

new DefaultHttpMethodRetryHandler());

try {

httpClient.getHttpConnectionManager().getParams()

.setConnectionTimeout(timeout);

int num = httpClient.executeMethod(getMethod);

if (num ==SC_OK) {

InputStream is = getMethod.getResponseBodyAsStream();

BufferedReader br =new BufferedReader(new InputStreamReader(is));

String tempbf;

StringBuffer html=new StringBuffer(1000);

while((tempbf=br.readLine())!=null){

html.append(tempbf);

}

responseMsg = html.toString();

}

} catch (Exception e) {

e.printStackTrace();

} finally {

getMethod.releaseConnection();

}

return responseMsg;

}

@SuppressWarnings("unchecked")

publicstatic String doHttpPost(String url, Map params,int timeout, String encode) {

String responseMsg ="";

HttpClient httpClient =new HttpClient();

httpClient.getParams().setContentCharset(encode);

PostMethod postMethod =new PostMethod(url);

if (params !=null && !params.isEmpty()) {

Iterator iterator = params.entrySet().iterator();

while (iterator.hasNext()) {

Entry entry = (Entry) iterator.next();

postMethod.addParameter(entry.getKey().toString(), entry

.getValue().toString());

}

}

try {

httpClient.getHttpConnectionManager().getParams()

.setConnectionTimeout(timeout);

int num = httpClient.executeMethod(postMethod);

if (num ==SC_OK) {

InputStream is = postMethod.getResponseBodyAsStream();

BufferedReader br =new BufferedReader(new InputStreamReader(is));

String tempbf;

StringBuffer html=new StringBuffer(1000);

while((tempbf=br.readLine())!=null){

html.append(tempbf);

}

responseMsg = html.toString();

}

} catch (Exception e) {

e.printStackTrace();

} finally {

postMethod.releaseConnection();

}

return responseMsg;

}

publicstatic String doHttpPostXml(String url, String xmlString,int timeout, String encode){

String responseString ="";

HttpClient httpClient =new HttpClient();

httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(timeout);

PostMethod postMethod =new PostMethod(url);

try {

postMethod.setRequestHeader("Content-Type","text/xml,charset="+encode);

postMethod.setRequestEntity(new StringRequestEntity(xmlString,"text/xml",encode));

int statusCode = httpClient.executeMethod(postMethod);

if(statusCode ==SC_OK){

InputStream is = postMethod.getResponseBodyAsStream();

BufferedReader br =new BufferedReader(new InputStreamReader(is));

String tempbf;

StringBuffer html=new StringBuffer(1000);

while((tempbf=br.readLine())!=null){

html.append(tempbf);

}

responseString = html.toString();

}

} catch (HttpException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return responseString;

}

}