HTTP请求
环境：J2EE 5.0
HTTP请求工具类
package xxx.util;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpConnectionManager;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
import org.apache.commons.httpclient.NameValuePair;
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.IdleConnectionTimeoutThread;
import java.io.File;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
/**
* httpClient处理
*/
public class HttpProtocolHandler {
/** 连接超时时间，缺省为8秒钟 */
private int defaultConnectionTimeout = 8000;
/** 回应超时时间,缺省为30秒钟 */
private int defaultSoTimeout = 30000;
/** 闲置连接超时时间,缺省为60秒钟 */
private int defaultIdleConnTimeout = 60000;
/**定义每台主机允许的最大连接数，默认为2*/
private int defaultMaxConnPerHost = 80;
/**httpConnectionManager管理的最大连接数，默认为20*/
private int defaultMaxTotalConn = 100;
/** 默认等待HttpConnectionManager返回连接超时（只有在达到最大连接数时起作用）*/
private static final long defaultHttpConnectionManagerTimeout = 3 * 1000;
/** HTTP连接管理器，该连接管理器必须是线程安全的. */
private HttpConnectionManager connectionManager;
private static HttpProtocolHandler httpProtocolHandler = new HttpProtocolHandler();
/** 工厂方法 */
public static HttpProtocolHandler getInstance() {
return httpProtocolHandler;
}
/**
* 私有的构造方法
*/
private HttpProtocolHandler() {
// 创建一个线程安全的HTTP连接池
connectionManager = new MultiThreadedHttpConnectionManager();
connectionManager.getParams().setDefaultMaxConnectionsPerHost(defaultMaxConnPerHost);
connectionManager.getParams().setMaxTotalConnections(defaultMaxTotalConn);
connectionManager.getParams().setConnectionTimeout(defaultConnectionTimeout);
connectionManager.getParams().setSoTimeout(defaultSoTimeout);
connectionManager.getParams().setIntParameter("http.socket.timeout", 30000);
IdleConnectionTimeoutThread ict = new IdleConnectionTimeoutThread();
ict.addConnectionManager(connectionManager);
ict.setConnectionTimeout(defaultIdleConnTimeout);
ict.start();
}
/**执行标志*/
private static boolean execFlag = true;
/**正在执行文件标志map*/
private static Map<String, Integer> writingFlagMap = new HashMap<String, Integer>();
/**恢复次数map*/
private static Map<String, Integer> reConnectMap = new HashMap<String, Integer>();
public boolean isExecFlag() {
return execFlag;
}
public void setExecFlag(boolean execFlag) {
HttpProtocolHandler.execFlag = execFlag;
}
public static Map<String, Integer> getWritingFlagMap() {
return writingFlagMap;
}
public void setWritingFlagMap(Map<String, Integer> writingFlagMap) {
HttpProtocolHandler.writingFlagMap = writingFlagMap;
}
/* ******************* 以下是请求文件*********************** */
/**
* 请求文件
* @param requestUrl
* @param savePath
* @return
*/
public boolean executeGetFile(String requestUrl,String savePath){
HttpClient httpclient = new HttpClient(connectionManager);
httpclient.getParams().setConnectionManagerTimeout(defaultHttpConnectionManagerTimeout);
FileOutputStream out = null;
// System.out.println("http://"+requestUrl);
HttpMethod method = new GetMethod("http://"+requestUrl);
InputStream in = null;
int len = -1;
byte[] b = new byte[1024];
try {
httpclient.executeMethod(method);
in = method.getResponseBodyAsStream();
if(method.getStatusCode()!=200){
System.out.println("信息：http://"+requestUrl+"访问失败，刷新信息失败。");
return false;
}
out = new FileOutputStream(new File(savePath));
while((len=in.read(b))!=-1){
out.write(b, 0, len);
}
out.flush();
} catch (HttpException e) {
e.printStackTrace();return false;
} catch (IOException e) {
e.printStackTrace();return false;
}finally{
try {
if(out!=null){out.close();}
} catch (IOException e) {
e.printStackTrace();
}
method.releaseConnection();
}
return true;
}
/**
* 直接读取文件信息(对于文件不大的)
* @param requestUrl
* @return
*/
public String executeGetString(String requestUrl){
HttpClient httpclient = new HttpClient(connectionManager);
httpclient.getParams().setConnectionManagerTimeout(defaultHttpConnectionManagerTimeout);
HttpMethod method = new GetMethod("http://"+requestUrl);
// method.setRequestHeader("Cookie","JSESSIONID="+sessionID);
method.getParams().setContentCharset("UTF-8");
String resultStr = "";
try {
httpclient.executeMethod(method);
resultStr = method.getResponseBodyAsString();
if(method.getStatusCode()!=200){
return null;
}
} catch (HttpException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}finally{
method.releaseConnection();
}
return resultStr;
}
/**
* 直接读取文件信息(对于文件不大的)
* @param requestUrl
* @return
*/
public String executeWSGetString(String requestUrl){
HttpClient httpclient = new HttpClient(connectionManager);
httpclient.getParams().setConnectionManagerTimeout(defaultHttpConnectionManagerTimeout);
HttpMethod method = new GetMethod("http://" + requestUrl);
method.setRequestHeader("Sec-WebSocket-Key", " esAjYnZeGHsnmqBc/BtOfA==");
method.setRequestHeader("Upgrade", "websocket");
method.getParams().setContentCharset("UTF-8");
String resultStr = "";
try {
httpclient.executeMethod(method);
resultStr = method.getResponseBodyAsString();
if (method.getStatusCode() != 200) {
return null;
}
} catch (HttpException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
} finally {
method.releaseConnection();
}
return resultStr;
}
/* ******************* 以下是POST带参数请求*********************** */
/**
* POST带参数请求
* @param requestUrl
* @param params
* @return
*/
public String executePostReq(String requestUrl,Map<String, String> params){
HttpClient httpclient = new HttpClient(connectionManager);
httpclient.getParams().setConnectionManagerTimeout(defaultHttpConnectionManagerTimeout);
// PostMethod pmethod = new PostMethod("http://"+requestUrl);
PostMethod pmethod = new PostMethod(requestUrl);
NameValuePair[] nvps = new NameValuePair[params.size()];
Set<String> keys1 = params.keySet();
int i = 0;
for(String name1:keys1){
NameValuePair p = new NameValuePair(name1,params.get(name1));
nvps[i] = p;
i++;
}
pmethod.setRequestBody(nvps);
pmethod.getParams().setContentCharset("UTF-8");
try {
httpclient.executeMethod(pmethod);
if(pmethod.getStatusCode()!=200){
return null;
}
String resultStr = pmethod.getResponseBodyAsString();
return resultStr;
} catch (HttpException e) {
e.printStackTrace();return null;
} catch (IOException e) {
e.printStackTrace();return null;
}finally{
pmethod.releaseConnection();
}
}
/**
* POST带参数请求
* @param requestUrl
* @param paramsStr
* @return
*/
public String executePostReq1(String requestUrl,String paramsStr){
HttpClient httpclient = new HttpClient(connectionManager);
httpclient.getParams().setConnectionManagerTimeout(defaultHttpConnectionManagerTimeout);
PostMethod pmethod = new PostMethod(requestUrl);
pmethod.setRequestBody(paramsStr);
pmethod.getParams().setContentCharset("UTF-8");
pmethod.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8");
pmethod.addRequestHeader("Content-Type","text/html;charset=utf-8");
try {
httpclient.executeMethod(pmethod);
if(pmethod.getStatusCode()!=200){
return null;
}
String resultStr = pmethod.getResponseBodyAsString();
return resultStr;
} catch (HttpException e) {
e.printStackTrace();return null;
} catch (IOException e) {
e.printStackTrace();return null;
}finally{
pmethod.releaseConnection();
}
}
}
测试方法
public static void main(String[] args) throws SOAPException, Exception {
Map<String, String> params = new HashMap<String, String>();
params.put("a","1");
String string="http://xxx/xxx";
/** *************以下是HTTP请求***************** */
// HttpProtocolHandler httpProtocolHandler = HttpProtocolHandler.getInstance();;
// System.out.println(httpProtocolHandler.executePostReq(string, params));
// System.out.println(string);
// System.out.println(httpProtocolHandler.executeGetString(string));
}
