Java实现Http工具类的封装操作示例

Java实现Http工具类的封装操作示例

本文实例讲述了java实现Http工具类的封装操作。分享给大家供大家参考，具体如下：

http工具类的实现：（通过apache包）第一个类

import java.io.IOException;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.HttpStatus;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.util.EntityUtils;

import com.gooagoo.stcu.utils.http.HttpClientUtils;

public class HTTPRequest {

private String errorMessage; // 錯誤信息

/**

* HTTP請求字符串資源

*

* @param url

* URL地址

* @return 字符串資源

* */

public String httpRequestString(String url) {

String result = null;

try {

HttpEntity httpEntity = httpRequest(url);

if (httpEntity != null) {

result = EntityUtils.toString(httpEntity, "urf-8"); // 使用UTF-8編碼

}

} catch (IOException e) {

errorMessage = e.getMessage();

}

return result;

}

/**

* HTTP請求字節數組資源

*

* @param url

* URL地址

* @return 字節數組資源

* */

public byte[] httpRequestByteArray(String url) {

byte[] result = null;

try {

HttpEntity httpEntity = httpRequest(url);

if (httpEntity != null) {

result = EntityUtils.toByteArray(httpEntity);

}

} catch (IOException e) {

errorMessage = e.getMessage();

}

return result;

}

/**

* 使用HTTP GET方式請求

*

* @param url

* URL地址

* @return HttpEntiry對象

* */

private HttpEntity httpRequest(String url) {

HttpEntity result = null;

try {

HttpGet httpGet = new HttpGet(url);

HttpClient httpClient = HttpClientUtils.getHttpClient();

HttpResponse httpResponse;

httpResponse = httpClient.execute(httpGet);

int httpStatusCode = httpResponse.getStatusLine().getStatusCode();

/*

* 判斷HTTP狀態碼是否為200

*/

if (httpStatusCode == HttpStatus.SC_OK) {

result = httpResponse.getEntity();

} else {

errorMessage = "HTTP: " + httpStatusCode;

}

} catch (ClientProtocolException e) {

errorMessage = e.getMessage();

} catch (IOException e) {

erroruAyhkRcrMessage = e.getMessage();

}

return result;

}

/**

* 返回錯誤消息

*

* @return 錯誤信息

* */

public String getErrorMessage() {

return this.errorMessage;

}

}

第二个类的实现：

package com.demo.http;

import java.net.UnknownHostException;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Map.Entry;

import org.apache.http.HttpResponse;

import org.apache.http.HttpStatus;

import org.apache.http.NameValuePair;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.params.BasicHttpParams;

import org.apache.http.params.HttpConnectionParams;

import org.apache.http.protocol.HTTP;

import org.apache.http.util.EntityUtils;

public class HttpClientUtils {

private static final int REQUEST_TIuAyhkRcrMEOUT = 5 * 1000;// 设置请求超时10秒钟

private static final int SO_TIMEOUT = 10 * 1000; // 设置等待数据超时时间10秒钟

//http:// static ParseXml parseXML = new ParseXml();

// 初始化HttpClient，并设置超时

public static HttpClient getHttpClient() {

BasicHttpParams httpParams = new BasicHttpParams();

HttpConnectionParams.setConnectionTimeout(httpParams, REQUEST_TIMEOUT);

HttpConnectionParams.setSoTimeout(httpParams, SO_TIMEOUT);

HttpClient client = new DefaultHttpClient(httpParams);

return client;

}

public static boolean doPost(String url) throws Exception {

HttpClient client = getHttpClient();

HttpPost httppost = new HttpPost(url);

HttpResponse response;

response = client.execute(httppost);

if (HttpStatus.SC_OK == response.getStatusLine().getStatusCode()) {

return true;

}

client.getConnectionManager().shutdown();

return false;

}

/**

* 与远程交互的返回值post方式

*

* @param hashMap

* @param url

* @return

*/

public static String getHttpXml(HashMap hashMap, String url) {

String responseMsg = "";

HttpPost request = new HttpPost(url);

List params = new ArrayList();

Iterator> iter = hashMap.entrySet()

.iterator();

while (iter.hasNext()) {

Entry entry = iter.next();

params.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));

}

try {

request.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));

HttpClient client = HttpClientUtils.getHttpClient();

HttpResponse response = client.execute(request);

if (response.getStatusLine().getStatusCode() == 200) {

responseMsg = EntityUtils.toString(response.getEntity());

}

} catch (UnknownHostException e) {

e.printStackTrace();

} catch (Exception e) {

e.printStackTrace();

}

return responseMsg;

}

/**

* map转字符串 拼接参数

*

* @param hashMap

* @return

*/

public static String mapToString(HashMap hashMap) {

String parameStr = "";

Iterator> iter = hashMap.entrySet()

.iterator();

while (iter.hasNext()) {

Entry entry = iter.next();

parameStr += "&" + entry.getKey() + "=" + entry.getValue();

}

if (parameStr.contains("&")) {

parameStr = parameStr.replaceFirst("&", "?");

}

return parameStr;

}

}

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