HTTP请求封装Java工具类

jopen 7年前

Java http请求类封装,当然也可以引用apache的httpclient,但是封装的目的就是减少jar包的引用,

    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;            }                    }