HTTP请求封装Java工具类

装载自：http://www.open-open.com/lib/view/open1384844838743.html

package com.wiker;  
      
    import java.io.BufferedReader;  
    import java.io.ByteArrayOutputStream;  
    import java.io.IOException;  
    import java.io.InputStream;  
    import java.io.InputStreamReader;  
    import java.io.OutputStream;  
    import java.net.HttpURLConnection;  
    import java.net.InetAddress;  
    import java.net.Socket;  
    import java.net.URL;  
    import java.net.URLConnection;  
    import java.net.URLEncoder;  
    import java.nio.charset.Charset;  
    import java.util.HashMap;  
    import java.util.Map;  
    import java.util.Map.Entry;  
    import java.util.Set;  
    import java.util.Vector;  
      
    /** 
     * @author Wiker Yong Email:<a href="mailto:wikeryong@gmail.com">wikeryong@gmail.com</a> 
     * @date 2013-11-8 下午7:22:43 
     * @version 1.0-SNAPSHOT 
     */  
    public class HttpUtils {  
      
        private String defaultContentEncoding;  
      
        public HttpUtils() {  
            this.defaultContentEncoding = Charset.defaultCharset().name();  
        }  
      
        /** 
         * 发送GET请求 
         *  
         * @param urlString  URL地址 
         * @return 响应对象 
         * @throws IOException 
         */  
        public HttpRespons sendGet(String urlString) throws IOException {  
            return this.send(urlString, "GET", null, null);  
        }  
      
        /** 
         * 发送GET请求 
         *  
         * @param urlString  URL地址 
         * @param params 参数集合 
         * @return 响应对象 
         * @throws IOException 
         */  
        public HttpRespons sendGet(String urlString, Map<String, String> params) throws IOException {  
            return this.send(urlString, "GET", params, null);  
        }  
      
        /** 
         * 发送GET请求 
         *  
         * @param urlString URL地址 
         * @param params 参数集合 
         * @param propertys 请求属性 
         * @return 响应对象 
         * @throws IOException 
         */  
        public HttpRespons sendGet(String urlString, Map<String, String> params, Map<String, String> propertys)  
                throws IOException {  
            return this.send(urlString, "GET", params, propertys);  
        }  
      
        /** 
         * 发送POST请求 
         *  
         * @param urlString URL地址 
         * @return 响应对象 
         * @throws IOException 
         */  
        public HttpRespons sendPost(String urlString) throws IOException {  
            return this.send(urlString, "POST", null, null);  
        }  
      
        /** 
         * 发送POST请求 
         *  
         * @param urlString URL地址 
         * @param params 参数集合 
         * @return 响应对象 
         * @throws IOException 
         */  
        public HttpRespons sendPost(String urlString, Map<String, String> params) throws IOException {  
            return this.send(urlString, "POST", params, null);  
        }  
      
        /** 
         * 发送POST请求 
         *  
         * @param urlString URL地址 
         * @param params 参数集合 
         * @param propertys 请求属性 
         * @return 响应对象 
         * @throws IOException 
         */  
        public HttpRespons sendPost(String urlString, Map<String, String> params, Map<String, String> propertys)  
                throws IOException {  
            return this.send(urlString, "POST", params, propertys);  
        }  
      
        /** 
         * 发送HTTP请求 
         *  
         * @param urlString 地址 
         * @param method  get/post 
         * @param parameters  添加由键值对指定的请求参数 
         * @param propertys  添加由键值对指定的一般请求属性 
         * @return 响映对象 
         * @throws IOException 
         */  
        private HttpRespons send(String urlString, String method, Map<String, String> parameters,  
                Map<String, String> propertys) throws IOException {  
            HttpURLConnection urlConnection = null;  
      
            if (method.equalsIgnoreCase("GET") && parameters != null) {  
                StringBuffer param = new StringBuffer();  
                int i = 0;  
                for (String key : parameters.keySet()) {  
                    if (i == 0)  
                        param.append("?");  
                    else  
                        param.append("&");  
                    param.append(key).append("=").append(parameters.get(key));  
                    i++;  
                }  
                urlString += param;  
            }  
      
            URL url = new URL(urlString);  
            urlConnection = (HttpURLConnection) url.openConnection();  
            urlConnection.setRequestMethod(method);  
            urlConnection.setDoOutput(true);  
            urlConnection.setDoInput(true);  
            urlConnection.setUseCaches(false);  
      
            if (propertys != null)  
                for (String key : propertys.keySet()) {  
                    urlConnection.addRequestProperty(key, propertys.get(key));  
                }  
      
            if (method.equalsIgnoreCase("POST") && parameters != null) {  
                StringBuffer param = new StringBuffer();  
                for (String key : parameters.keySet()) {  
                    param.append("&");  
                    param.append(key).append("=").append(parameters.get(key));  
                }  
                urlConnection.getOutputStream().write(param.toString().getBytes());  
                urlConnection.getOutputStream().flush();  
                urlConnection.getOutputStream().close();  
            }  
            return this.makeContent(urlString, urlConnection);  
        }  
      
        /** 
         * 得到响应对象 
         *  
         * @param urlConnection 
         * @return 响应对象 
         * @throws IOException 
         */  
        private HttpRespons makeContent(String urlString, HttpURLConnection urlConnection) throws IOException {  
            HttpRespons httpResponser = new HttpRespons();  
            try {  
                InputStream in = urlConnection.getInputStream();  
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));  
                httpResponser.contentCollection = new Vector<String>();  
                StringBuffer temp = new StringBuffer();  
                String line = bufferedReader.readLine();  
                while (line != null) {  
                    httpResponser.contentCollection.add(line);  
                    temp.append(line).append("\r\n");  
                    line = bufferedReader.readLine();  
                }  
                bufferedReader.close();  
                String ecod = urlConnection.getContentEncoding();  
                if (ecod == null)  
                    ecod = this.defaultContentEncoding;  
                httpResponser.urlString = urlString;  
                httpResponser.defaultPort = urlConnection.getURL().getDefaultPort();  
                httpResponser.file = urlConnection.getURL().getFile();  
                httpResponser.host = urlConnection.getURL().getHost();  
                httpResponser.path = urlConnection.getURL().getPath();  
                httpResponser.port = urlConnection.getURL().getPort();  
                httpResponser.protocol = urlConnection.getURL().getProtocol();  
                httpResponser.query = urlConnection.getURL().getQuery();  
                httpResponser.ref = urlConnection.getURL().getRef();  
                httpResponser.userInfo = urlConnection.getURL().getUserInfo();  
                httpResponser.content = new String(temp.toString().getBytes(), ecod);  
                httpResponser.contentEncoding = ecod;  
                httpResponser.code = urlConnection.getResponseCode();  
                httpResponser.message = urlConnection.getResponseMessage();  
                httpResponser.contentType = urlConnection.getContentType();  
                httpResponser.method = urlConnection.getRequestMethod();  
                httpResponser.connectTimeout = urlConnection.getConnectTimeout();  
                httpResponser.readTimeout = urlConnection.getReadTimeout();  
                return httpResponser;  
            } catch (IOException e) {  
                throw e;  
            } finally {  
                if (urlConnection != null)  
                    urlConnection.disconnect();  
            }  
        }  
      
        /** 
         * 默认的响应字符集 
         */  
        public String getDefaultContentEncoding() {  
            return this.defaultContentEncoding;  
        }  
      
          
        /** 
         * 发送GET请求 
         * @param url 
         * @param params 
         * @param headers 
         * @return 
         * @throws Exception 
         */  
        public static URLConnection sendGetRequest(String url,  
                Map<String, String> params, Map<String, String> headers)  
                throws Exception {  
            StringBuilder buf = new StringBuilder(url);  
            Set<Entry<String, String>> entrys = null;  
            // 如果是GET请求，则请求参数在URL中  
            if (params != null && !params.isEmpty()) {  
                buf.append("?");  
                entrys = params.entrySet();  
                for (Map.Entry<String, String> entry : entrys) {  
                    buf.append(entry.getKey()).append("=")  
                            .append(URLEncoder.encode(entry.getValue(), "UTF-8"))  
                            .append("&");  
                }  
                buf.deleteCharAt(buf.length() - 1);  
            }  
            URL url1 = new URL(buf.toString());  
            HttpURLConnection conn = (HttpURLConnection) url1.openConnection();  
            conn.setRequestMethod("GET");  
            // 设置请求头  
            if (headers != null && !headers.isEmpty()) {  
                entrys = headers.entrySet();  
                for (Map.Entry<String, String> entry : entrys) {  
                    conn.setRequestProperty(entry.getKey(), entry.getValue());  
                }  
            }  
            conn.getResponseCode();  
            return conn;  
        }  
        /** 
         * 发送POST请求 
         * @param url    
         * @param params 
         * @param headers 
         * @return  
         * @throws Exception 
         */  
        public static URLConnection sendPostRequest(String url,  
                Map<String, String> params, Map<String, String> headers)  
                throws Exception {  
            StringBuilder buf = new StringBuilder();  
            Set<Entry<String, String>> entrys = null;  
            // 如果存在参数，则放在HTTP请求体，形如name=aaa&age=10  
            if (params != null && !params.isEmpty()) {  
                entrys = params.entrySet();  
                for (Map.Entry<String, String> entry : entrys) {  
                    buf.append(entry.getKey()).append("=")  
                            .append(URLEncoder.encode(entry.getValue(), "UTF-8"))  
                            .append("&");  
                }  
                buf.deleteCharAt(buf.length() - 1);  
            }  
            URL url1 = new URL(url);  
            HttpURLConnection conn = (HttpURLConnection) url1.openConnection();  
            conn.setRequestMethod("POST");  
            conn.setDoOutput(true);  
            OutputStream out = conn.getOutputStream();  
            out.write(buf.toString().getBytes("UTF-8"));  
            if (headers != null && !headers.isEmpty()) {  
                entrys = headers.entrySet();  
                for (Map.Entry<String, String> entry : entrys) {  
                    conn.setRequestProperty(entry.getKey(), entry.getValue());  
                }  
            }  
            conn.getResponseCode(); // 为了发送成功  
            return conn;  
        }  
        /** 
         * 直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能: 
         *   <FORM METHOD=POST ACTION="http://192.168.0.200:8080/ssi/fileload/test.do" enctype="multipart/form-data"> 
                <INPUT TYPE="text" NAME="name"> 
                <INPUT TYPE="text" NAME="id"> 
                <input type="file" name="imagefile"/> 
                <input type="file" name="zip"/> 
             </FORM> 
         * @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080这样的路径测试) 
         * @param params 请求参数 key为参数名,value为参数值 
         * @param file 上传文件 
         */  
        public static boolean uploadFiles(String path, Map<String, String> params, FormFile[] files) throws Exception{       
            final String BOUNDARY = "---------------------------7da2137580612"; //数据分隔线  
            final String endline = "--" + BOUNDARY + "--\r\n";//数据结束标志  
              
            int fileDataLength = 0;  
            if(files!=null&&files.length!=0){  
                for(FormFile uploadFile : files){//得到文件类型数据的总长度  
                    StringBuilder fileExplain = new StringBuilder();  
                    fileExplain.append("--");  
                    fileExplain.append(BOUNDARY);  
                    fileExplain.append("\r\n");  
                    fileExplain.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");  
                    fileExplain.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");  
                    fileExplain.append("\r\n");  
                    fileDataLength += fileExplain.length();  
                    if(uploadFile.getInStream()!=null){  
                        fileDataLength += uploadFile.getFile().length();  
                    }else{  
                        fileDataLength += uploadFile.getData().length;  
                    }  
                }  
            }  
            StringBuilder textEntity = new StringBuilder();  
            if(params!=null&&!params.isEmpty()){  
                for (Map.Entry<String, String> entry : params.entrySet()) {//构造文本类型参数的实体数据  
                    textEntity.append("--");  
                    textEntity.append(BOUNDARY);  
                    textEntity.append("\r\n");  
                    textEntity.append("Content-Disposition: form-data; name=\""+ entry.getKey() + "\"\r\n\r\n");  
                    textEntity.append(entry.getValue());  
                    textEntity.append("\r\n");  
                }  
            }  
            //计算传输给服务器的实体数据总长度  
            int dataLength = textEntity.toString().getBytes().length + fileDataLength +  endline.getBytes().length;  
              
            URL url = new URL(path);  
            int port = url.getPort()==-1 ? 80 : url.getPort();  
            Socket socket = new Socket(InetAddress.getByName(url.getHost()), port);          
            OutputStream outStream = socket.getOutputStream();  
            //下面完成HTTP请求头的发送  
            String requestmethod = "POST "+ url.getPath()+" HTTP/1.1\r\n";  
            outStream.write(requestmethod.getBytes());  
            String accept = "Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*\r\n";  
            outStream.write(accept.getBytes());  
            String language = "Accept-Language: zh-CN\r\n";  
            outStream.write(language.getBytes());  
            String contenttype = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "\r\n";  
            outStream.write(contenttype.getBytes());  
            String contentlength = "Content-Length: "+ dataLength + "\r\n";  
            outStream.write(contentlength.getBytes());  
            String alive = "Connection: Keep-Alive\r\n";  
            outStream.write(alive.getBytes());  
            String host = "Host: "+ url.getHost() +":"+ port +"\r\n";  
            outStream.write(host.getBytes());  
            //写完HTTP请求头后根据HTTP协议再写一个回车换行  
            outStream.write("\r\n".getBytes());  
            //把所有文本类型的实体数据发送出来  
            outStream.write(textEntity.toString().getBytes());           
            //把所有文件类型的实体数据发送出来  
            if(files!=null&&files.length!=0){  
                for(FormFile uploadFile : files){  
                    StringBuilder fileEntity = new StringBuilder();  
                    fileEntity.append("--");  
                    fileEntity.append(BOUNDARY);  
                    fileEntity.append("\r\n");  
                    fileEntity.append("Content-Disposition: form-data;name=\""+ uploadFile.getParameterName()+"\";filename=\""+ uploadFile.getFilname() + "\"\r\n");  
                    fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"\r\n\r\n");  
                    outStream.write(fileEntity.toString().getBytes());  
                    if(uploadFile.getInStream()!=null){  
                        byte[] buffer = new byte[1024];  
                        int len = 0;  
                        while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1){  
                            outStream.write(buffer, 0, len);  
                        }  
                        uploadFile.getInStream().close();  
                    }else{  
                        outStream.write(uploadFile.getData(), 0, uploadFile.getData().length);  
                    }  
                    outStream.write("\r\n".getBytes());  
                }  
            }  
            //下面发送数据结束标志，表示数据已经结束  
            outStream.write(endline.getBytes());  
            BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));  
            if(reader.readLine().indexOf("200")==-1){//读取web服务器返回的数据，判断请求码是否为200，如果不是200，代表请求失败  
                return false;  
            }  
            outStream.flush();  
            outStream.close();  
            reader.close();  
            socket.close();  
            return true;  
        }  
        /**  
         * 提交数据到服务器  
         * @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080这样的路径测试)  
         * @param params 请求参数 key为参数名,value为参数值  
         * @param file 上传文件  
         */  
        public static boolean uploadFile(String path, Map<String, String> params, FormFile file) throws Exception{  
           return uploadFiles(path, params, new FormFile[]{file});  
        }  
        /** 
         * 将输入流转为字节数组 
         * @param inStream 
         * @return 
         * @throws Exception 
         */  
        public static byte[] read2Byte(InputStream inStream)throws Exception{  
            ByteArrayOutputStream outSteam = new ByteArrayOutputStream();  
            byte[] buffer = new byte[1024];  
            int len = 0;  
            while( (len = inStream.read(buffer)) !=-1 ){  
                outSteam.write(buffer, 0, len);  
            }  
            outSteam.close();  
            inStream.close();  
            return outSteam.toByteArray();  
        }  
        /** 
         * 将输入流转为字符串 
         * @param inStream 
         * @return 
         * @throws Exception 
         */  
        public static String read2String(InputStream inStream)throws Exception{  
            ByteArrayOutputStream outSteam = new ByteArrayOutputStream();  
            byte[] buffer = new byte[1024];  
            int len = 0;  
            while( (len = inStream.read(buffer)) !=-1 ){  
                outSteam.write(buffer, 0, len);  
            }  
            outSteam.close();  
            inStream.close();  
            return new String(outSteam.toByteArray(),"UTF-8");  
        }  
        /** 
         * 发送xml数据 
         * @param path 请求地址 
         * @param xml xml数据 
         * @param encoding 编码 
         * @return 
         * @throws Exception 
         */  
        public static byte[] postXml(String path, String xml, String encoding) throws Exception{  
            byte[] data = xml.getBytes(encoding);  
            URL url = new URL(path);  
            HttpURLConnection conn = (HttpURLConnection)url.openConnection();  
            conn.setRequestMethod("POST");  
            conn.setDoOutput(true);  
            conn.setRequestProperty("Content-Type", "text/xml; charset="+ encoding);  
            conn.setRequestProperty("Content-Length", String.valueOf(data.length));  
            conn.setConnectTimeout(5 * 1000);  
            OutputStream outStream = conn.getOutputStream();  
            outStream.write(data);  
            outStream.flush();  
            outStream.close();  
            if(conn.getResponseCode()==200){  
                return read2Byte(conn.getInputStream());  
            }  
            return null;  
        }  
        //测试函数  
        public static void main(String args[]) throws Exception {  
            Map<String, String> params = new HashMap<String, String>();  
            params.put("name", "xiazdong");  
            params.put("age", "10");  
            HttpURLConnection conn = (HttpURLConnection)  
                    sendGetRequest(  
                            "http://192.168.0.103:8080/Server/PrintServlet",  
                            params, null);  
            int code = conn.getResponseCode();  
            InputStream in = conn.getInputStream();  
            byte[]data = read2Byte(in);  
        }  
          
        /** 
         * 设置默认的响应字符集 
         */  
        public void setDefaultContentEncoding(String defaultContentEncoding) {  
            this.defaultContentEncoding = defaultContentEncoding;  
        }  
    }  
需要引用到的文件FormFile.java如下：
    package com.wiker;  
      
    import java.io.File;  
    import java.io.FileInputStream;  
    import java.io.FileNotFoundException;  
    import java.io.InputStream;  
      
    /** 
     * 上传文件 
     */  
    public class FormFile {  
        /* 上传文件的数据 */  
        private byte[] data;  
        private InputStream inStream;  
        private File file;  
        /* 文件名称 */  
        private String filname;  
        /* 请求参数名称*/  
        private String parameterName;  
        /* 内容类型 */  
        private String contentType = "application/octet-stream";  
          
        /** 
         * 此函数用来传输小文件 
         * @param filname 
         * @param data 
         * @param parameterName 
         * @param contentType 
         */  
        public FormFile(String filname, byte[] data, String parameterName, String contentType) {  
            this.data = data;  
            this.filname = filname;  
            this.parameterName = parameterName;  
            if(contentType!=null) this.contentType = contentType;  
        }  
        /** 
         * 此函数用来传输大文件 
         * @param filname 
         * @param file 
         * @param parameterName 
         * @param contentType 
         */  
        public FormFile(String filname, File file, String parameterName, String contentType) {  
            this.filname = filname;  
            this.parameterName = parameterName;  
            this.file = file;  
            try {  
                this.inStream = new FileInputStream(file);  
            } catch (FileNotFoundException e) {  
                e.printStackTrace();  
            }  
            if(contentType!=null) this.contentType = contentType;  
        }  
          
        public File getFile() {  
            return file;  
        }  
      
        public InputStream getInStream() {  
            return inStream;  
        }  
      
        public byte[] getData() {  
            return data;  
        }  
      
        public String getFilname() {  
            return filname;  
        }  
      
        public void setFilname(String filname) {  
            this.filname = filname;  
        }  
      
        public String getParameterName() {  
            return parameterName;  
        }  
      
        public void setParameterName(String parameterName) {  
            this.parameterName = parameterName;  
        }  
      
        public String getContentType() {  
            return contentType;  
        }  
      
        public void setContentType(String contentType) {  
            this.contentType = contentType;  
        }  
          
    }