HttpUtils

package com.labwe.cms.util;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.net.URL;

import java.util.Map;

import java.util.Properties;

import javax.net.ssl.HttpsURLConnection;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

* HTTP请求/响应数据处理工具

* @author 周正德(CN) Bond(EN)

*

*/

public class HttpUtils {

/**

* 设置头

*/

public static final String CHARACTER_ENCODING = "UTF-8";

public static final String METHOD_POST = "POST";

public static final String CONTENT_TYPE = "Content_Type";

/**

* 响应流写入

*

* @param response

* @param data

* @throws IOException

*/

public static void responseWrite(HttpServletResponse response, byte[] data) throws IOException {

if (data != null) {

response.setContentLength(data.length);

DataOutputStream out = new DataOutputStream(response.getOutputStream());

out.write(data);

out.flush();

out.close();

}

}

/**

* 读取请求流

*

* @param request

* @return

* @throws IOException

*/

public static byte[] requestRead(HttpServletRequest request) throws IOException {

int contentLength = request.getContentLength();

byte[] data = null;

if (contentLength > 0) {

data = new byte[contentLength];

InputStream is = request.getInputStream();

DataInputStream dis = new DataInputStream(is);

dis.readFully(data);

dis.close();

}

return data;

}

/**

* 以POST方法接受请求数据 一般使用这个即可

* @param url

* @param requestData

* @return

* @throws Exception

*/

public static byte[] postRequest(String url, byte[] requestData) throws Exception {

Properties properties = new Properties();

properties.setProperty(CONTENT_TYPE, "application/octet-stream;charset=" + CHARACTER_ENCODING);

return postRequest(url, requestData, properties);

}

/**

* 以POST方法接受请求数据

* @param urlString

* @param requestData

* @param properties

* @return

* @throws Exception

*/

public static byte[] postRequest(String urlString, byte[] requestData, Properties properties) throws Exception {

byte[] responseData = null;

HttpsURLConnection con = null;

try {

URL url = new URL(urlString);

con = (HttpsURLConnection) url.openConnection();

if ((properties != null) && (properties.size() > 0)) {

for (Map.Entry<Object, Object> entry : properties.entrySet()) {

String key = String.valueOf(entry.getKey());

String value = String.valueOf(entry.getValue());

con.setRequestProperty(key, value);

}

}

con.setRequestMethod(METHOD_POST);

con.setDoOutput(true);

con.setDoInput(true);

DataOutputStream dos = new DataOutputStream(con.getOutputStream());

if (requestData != null) {

dos.write(requestData);

}

dos.flush();

dos.close();

DataInputStream dis = new DataInputStream(con.getInputStream());

int length = con.getContentLength();

if (length > 0) {

responseData = new byte[length];

dis.readFully(responseData);

}

dis.close();

} catch (Exception e) {

e.printStackTrace();

} finally {

if (con != null) {

con.disconnect();

con = null;

}

}

return responseData;

}

}