java http工具类
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一、使用HttpURLConnection，实现get,post,put,delete,upload,download静态方法
import java.io.ByteArrayOutputStream;import java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.io.RandomAccessFile;import java.net.HttpURLConnection;import java.net.URL;import java.util.Map;/** * HttpURLConnection封装工具类 * * @author CHHuang * */public class HttpUtil { public static final String SERVLET_POST = "POST" ; public static final String SERVLET_GET = "GET" ; public static final String SERVLET_DELETE = "DELETE" ; public static final String SERVLET_PUT = "PUT" ; public static final String UTF_8 = "UTF-8" ; public static final String CONTENT_TYPE = "Content-Type"; public static final String CHARSET = "Charset"; public static final String CONNECTION = "Connection"; public static final String REFERER = "Referer"; private static final String ACCEPT = "Accept"; private static final String RANGE = "Range"; private static final int TIME_OUT = 10000; private static final String PREFIX = "--"; private static final String LINE_END = "\r\n"; public static final String BOUNDARY = "*****"; public static final String TEXT_PLAIN= "text/plain; charset=utf-8"; public static final String KEEP_ALIVE = "Keep-Alive"; public static final String MULTIPAT_FORMDATA= "multipart/form-data; boundary=" + BOUNDARY; private static final String ACCEPT_VALUE = "*/*"; /** * 拼接请求参数 * * @param paramMap * @return */ public static String prepareParam(Map<String,Object> paramMap){ StringBuffer sb = new StringBuffer(); if(paramMap==null || paramMap.isEmpty()){ return null ; }else{ for(String key: paramMap.keySet()){ String value = (String)paramMap.get(key); if(sb.length()<1){ sb.append(key).append("=").append(value); }else{ sb.append("&").append(key).append("=").append(value); } } return sb.toString(); } } /** * post提交数据 * * @param urlStr * @param paramMap * @return * @throws Exception */ public static HttpURLConnection doPost(String urlStr, Map<String,Object> params, Map<String,String> propertys) throws IOException{ URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setRequestMethod(SERVLET_POST); conn.setUseCaches(false); conn.setDoInput(true); conn.setDoOutput(true); conn.setConnectTimeout(TIME_OUT); /*setRequestProperty*/ conn.setRequestProperty(CONTENT_TYPE, TEXT_PLAIN); if (propertys!=null && !propertys.isEmpty()){ for (String key : propertys.keySet()) { conn.setRequestProperty(key, propertys.get(key)); } } /*设置参数*/ String paramStr = prepareParam(params); if(paramStr!=null && !"".equals(paramStr)){ OutputStream os = conn.getOutputStream(); os.write(paramStr.toString().getBytes(UTF_8)); os.flush(); os.close(); } return conn; } /** * get提交数据 * * @param urlStr * @param paramMap * @return * @throws Exception */ public static HttpURLConnection doGet(String urlStr, Map<String,Object> params, Map<String,String> propertys) throws IOException{ /*设置参数*/ String paramStr = prepareParam(params); if(paramStr!=null && !"".equals(paramStr)){ urlStr +="?"+paramStr; } URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setRequestMethod(SERVLET_GET); conn.setUseCaches(false); conn.setDoInput(true); conn.setDoOutput(true); conn.setConnectTimeout(TIME_OUT); /*setRequestProperty*/ conn.setRequestProperty(CONTENT_TYPE, TEXT_PLAIN); if (propertys!=null && !propertys.isEmpty()){ for (String key : propertys.keySet()) { conn.setRequestProperty(key, propertys.get(key)); } } return conn; } /** * put提交数据 * * @param urlStr * @param paramMap * @return * @throws Exception */ public static HttpURLConnection doPut(String urlStr, Map<String,Object> params, Map<String,String> propertys) throws IOException{ URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setRequestMethod(SERVLET_PUT); conn.setUseCaches(false); conn.setDoInput(true); conn.setDoOutput(true); conn.setConnectTimeout(TIME_OUT); /*setRequestProperty*/ conn.setRequestProperty(CONTENT_TYPE, TEXT_PLAIN); if (propertys!=null && !propertys.isEmpty()){ for (String key : propertys.keySet()) { conn.setRequestProperty(key, propertys.get(key)); } } /*设置参数*/ String paramStr = prepareParam(params); if(paramStr!=null && !"".equals(paramStr)){ OutputStream os = conn.getOutputStream(); os.write(paramStr.toString().getBytes(UTF_8)); os.flush(); os.close(); } return conn; } /** * delete提交数据 * * @param urlStr * @param paramMap * @return * @throws IOException * @throws Exception */ public static HttpURLConnection doDelete(String urlStr, Map<String,Object> params, Map<String,String> propertys) throws IOException{ /*设置参数*/ String paramStr = prepareParam(params); if(paramStr!=null && !"".equals(paramStr)){ urlStr +="?"+paramStr; } URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setRequestMethod(SERVLET_DELETE); conn.setUseCaches(false); conn.setDoInput(true); conn.setDoOutput(true); conn.setConnectTimeout(TIME_OUT); /*setRequestProperty*/ conn.setRequestProperty(CONTENT_TYPE, TEXT_PLAIN); if (propertys!=null && !propertys.isEmpty()){ for (String key : propertys.keySet()) { conn.setRequestProperty(key, propertys.get(key)); } } return conn; } /** * 上传文件 及 提交参数 * * @param uploadUrl * @param files * @param params * @param propertys * @return * @throws IOException */ public static HttpURLConnection doUpload(String uploadUrl, Map<String,File> files, Map<String,Object> params, Map<String,String> propertys) throws IOException { URL url = new URL(uploadUrl); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); /* 允许Input、Output，不使用Cache */ conn.setDoInput(true); conn.setDoOutput(true); conn.setUseCaches(false); conn.setConnectTimeout(TIME_OUT); /* 设置传送的method=POST */ conn.setRequestMethod(SERVLET_POST); /* setRequestProperty */ if (propertys!=null && !propertys.isEmpty()){ for (String key : propertys.keySet()) { conn.setRequestProperty(key, propertys.get(key)); } } conn.setRequestProperty(CONNECTION, KEEP_ALIVE); conn.setRequestProperty(CHARSET, UTF_8); conn.setRequestProperty(CONTENT_TYPE,MULTIPAT_FORMDATA); /* 设置DataOutputStream */ DataOutputStream ds = new DataOutputStream(conn.getOutputStream()); /* 拼接参数 */ if(params!=null && !params.isEmpty()){ for(String key : params.keySet()){ ds.writeBytes(PREFIX + BOUNDARY + LINE_END); ds.write(("Content-Disposition: form-data;" + "name=\"" + key + "\"" + LINE_END).getBytes(UTF_8)); ds.writeBytes(LINE_END); ds.write(params.get(key).toString().getBytes(UTF_8)); ds.writeBytes(LINE_END); } } /* 拼接文件 */ if (files!=null && !files.isEmpty()){ for (String key : files.keySet()) { ds.writeBytes(PREFIX + BOUNDARY + LINE_END); ds.write(("Content-Disposition: form-data;" + "name=\"" + key + "\";filename=\"" + files.get(key).getName() + "\"" + LINE_END).getBytes(UTF_8)); ds.writeBytes(LINE_END); /* 取得文件的FileInputStream */ FileInputStream fStream = new FileInputStream(files.get(key)); /* 设置每次写入1024bytes */ int bufferSize = 1024; byte[] buffer = new byte[bufferSize]; int length = -1; /* 从文件读取数据至缓冲区 */ while ((length = fStream.read(buffer)) != -1) { /* 将资料写入DataOutputStream中 */ ds.write(buffer, 0, length); } ds.writeBytes(LINE_END); fStream.close(); } ds.writeBytes(PREFIX + BOUNDARY + PREFIX + LINE_END); } /* close streams */ ds.flush(); ds.close(); return conn; } /** * 下载文件 * * @param downloadUrl * @param filePath * @param params * @param propertys * @return * @throws IOException */ public static HttpURLConnection doDownload(String downloadUrl, Map<String,Object> params, Map<String,String> propertys) throws IOException{ /*设置参数*/ String paramStr = prepareParam(params); if(paramStr!=null && !"".equals(paramStr)){ downloadUrl +="?"+paramStr; } URL url = new URL(downloadUrl); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setRequestMethod(SERVLET_GET); conn.setUseCaches(false); conn.setDoInput(true); conn.setDoOutput(true); conn.setConnectTimeout(TIME_OUT); /*setRequestProperty*/ if (propertys!=null && !propertys.isEmpty()){ for (String key : propertys.keySet()) { conn.setRequestProperty(key, propertys.get(key)); } } conn.setRequestProperty(REFERER, url.toString()); conn.setRequestProperty(CHARSET, UTF_8); conn.setRequestProperty(ACCEPT, ACCEPT_VALUE); conn.setRequestProperty(CONNECTION, KEEP_ALIVE); conn.setRequestProperty(RANGE, "bytes=0-");//从第几字节到第几个字节 return conn; } /** * 获取返回内容 * * @param conn * @return * @throws IOException */ public static String getString(HttpURLConnection conn) throws IOException{ InputStream in = conn.getInputStream(); StringBuffer out = new StringBuffer(); byte[] b = new byte[4096]; int n; while ((n = in.read(b))!= -1){ out.append(new String(b,0,n)); } in.close(); return out.toString(); } /** * 获取返回byte[] * * @param conn * @return * @throws IOException */ public static byte[] getBytes(HttpURLConnection conn) throws IOException{ InputStream in = conn.getInputStream(); ByteArrayOutputStream output = new ByteArrayOutputStream(); byte[] buffer = new byte[4096]; int n = 0; while (-1 != (n = in.read(buffer))) { output.write(buffer, 0, n); } return output.toByteArray(); } /** * 获取返回文件 * * @param conn * @param filePath * @return * @throws IOException */ public static File getFile(HttpURLConnection conn, String filePath) throws IOException{ /*下载文件*/ InputStream in = conn.getInputStream(); RandomAccessFile rf = new RandomAccessFile(filePath,"rw"); rf.seek(0); byte[] b = new byte[204800]; int n; while((n=in.read(b,0,1024)) > 0){ rf.write(b,0,n); } rf.close(); in.close(); /*返回文件*/ return new File(filePath); } /** * test * @param args */// public static void main(String[] args) {// HttpURLConnection conn = null;// try {// Map<String, Object> params = new HashMap<String, Object>();// params.put("token", "760");// params.put("title", "你好1");// params.put("content", "你好2");// params.put("tickerText", "你好3");// conn = doGet("http://localhost:8080/ising/DDPush/push.app", params, null);// conn = doPost("http://localhost:8080/ising/DDPush/ppush.app", params, null);// // Map<String, File> files = new HashMap<String, File>();// files.put("file1", new File("C:/Users/HuangChen/Desktop/软件测试题答案.docx"));// conn = doUpload("http://localhost:8080/ising/file/upload.app", files, params,null);// conn = doDownload("http://localhost:8080/ising/file/download/5799bc4cc61c84a4deabd8fe.docx", null, null);// conn = doDelete("http://localhost:8080/ising/file/delete/5799bc4cc61c84a4deabd8fe.app", null, null);// if(conn!=null){// if(conn.getResponseCode()==200){// System.out.println(getString(conn));// System.out.println(getBytes(conn));// System.out.println(getFile(conn,"C:/Users/HuangChen/Desktop/test.docx"));// }else{// System.out.println(conn.getResponseCode());// System.out.println(conn.getResponseMessage());// }// }// conn.disconnect();// } catch (IOException e) {// e.printStackTrace();// }finally{// if(conn != null)// conn.disconnect();// }// }}二、使用HttpClients，实现get,post,put,delete,upload,download静态方法，并且支持https
import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.security.KeyManagementException;import java.security.KeyStoreException;import java.security.NoSuchAlgorithmException;import java.security.cert.CertificateException;import java.util.Iterator;import java.util.List;import java.util.Map;import java.util.Map.Entry;import javax.net.ssl.SSLContext;import net.sf.json.JSONObject;import org.apache.http.Consts;import org.apache.http.Header;import org.apache.http.HttpEntity;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.client.utils.URLEncodedUtils;import org.apache.http.conn.ssl.SSLConnectionSocketFactory;import org.apache.http.entity.StringEntity;import org.apache.http.entity.mime.MultipartEntityBuilder;import org.apache.http.entity.mime.content.ContentBody;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.message.BasicNameValuePair;import org.apache.http.ssl.SSLContextBuilder;import org.apache.http.ssl.TrustStrategy;import org.apache.http.util.EntityUtils;import com.chhuang.utils.file.FileUtil;/** * * @author CHHuang * */public class HttpClientUtil { private HttpClientUtil() { } public static final String HTTPS = "https"; public static final String APPLICATION_JSON = "application/json"; public static final String TEXT_PLAIN = "text/plain"; public static final String SET_COOKIE = "Set-Cookie"; public static final String CONTENT_TYPE = "Content-Type"; public static final String CONTENT_LANGUAGE = "Content-Language"; public static final String QUESTION = "?"; public static final String AND = "&"; public static final String POINT = "."; public static CloseableHttpClient createSSLClientDefault() { try { SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial( null, new TrustStrategy() { public boolean isTrusted( java.security.cert.X509Certificate[] arg0, String arg1) throws CertificateException { return true; } }).build(); SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory( sslContext); return HttpClients.custom().setSSLSocketFactory(sslsf).build(); } catch (KeyManagementException e) { e.printStackTrace(); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (KeyStoreException e) { e.printStackTrace(); } return HttpClients.createDefault(); } /** * * @param url * @param params * @return * @throws ClientProtocolException * @throws IOException */ public static ResponseBean post(String url, List<BasicNameValuePair> params, Header[] headers) throws ClientProtocolException, IOException { // 创建默认的httpClient实例. CloseableHttpClient httpClient = null; if (url.toLowerCase().startsWith(HTTPS)) { httpClient = createSSLClientDefault(); } else { httpClient = HttpClients.createDefault(); } // 创建httppost HttpPost httpPost = new HttpPost(url); if (headers != null && headers.length > 0) { httpPost.setHeaders(headers); } if (params != null) { httpPost.setEntity(new UrlEncodedFormEntity(params, Consts.UTF_8)); } CloseableHttpResponse response = httpClient.execute(httpPost); HttpEntity entity = response.getEntity(); String result = EntityUtils.toString(entity, Consts.UTF_8); ResponseBean responseBean = new ResponseBean(response.getAllHeaders(), response.getLocale(), response.getProtocolVersion(), response.getStatusLine(), result); response.close(); httpClient.close(); return responseBean; } /** * * @param url * @param json * @return * @throws ClientProtocolException * @throws IOException */ public static ResponseBean post(String url, JSONObject json, Header[] headers) throws ClientProtocolException, IOException { // 创建默认的httpClient实例. CloseableHttpClient httpClient = null; if (url.toLowerCase().startsWith(HTTPS)) { httpClient = createSSLClientDefault(); } else { httpClient = HttpClients.createDefault(); } // 创建httppost HttpPost httpPost = new HttpPost(url); if (headers != null && headers.length > 0) { httpPost.setHeaders(headers); } if (json != null) { StringEntity entity = new StringEntity(json.toString(), Consts.UTF_8); entity.setContentType(APPLICATION_JSON); httpPost.setEntity(entity); } CloseableHttpResponse response = httpClient.execute(httpPost); HttpEntity entity = response.getEntity(); String result = EntityUtils.toString(entity, Consts.UTF_8); ResponseBean responseBean = new ResponseBean(response.getAllHeaders(), response.getLocale(), response.getProtocolVersion(), response.getStatusLine(), result); response.close(); httpClient.close(); return responseBean; } /** * * @param url * @param params * @return * @throws ClientProtocolException * @throws IOException */ public static ResponseBean get(String url, List<BasicNameValuePair> params, Header[] headers) throws ClientProtocolException, IOException { // 创建默认的httpClient实例. CloseableHttpClient httpClient = null; if (url.toLowerCase().startsWith(HTTPS)) { httpClient = createSSLClientDefault(); } else { httpClient = HttpClients.createDefault(); } // 创建httpGet HttpGet httpGet = new HttpGet(url); if (headers != null && headers.length > 0) { httpGet.setHeaders(headers); } if (params != null) { String param = URLEncodedUtils.format(params, Consts.UTF_8); if (url.lastIndexOf(QUESTION) == -1) { url += QUESTION + param; } else { url += AND + param; } } CloseableHttpResponse response = httpClient.execute(httpGet); HttpEntity entity = response.getEntity(); String result = EntityUtils.toString(entity, Consts.UTF_8); ResponseBean responseBean = new ResponseBean(response.getAllHeaders(), response.getLocale(), response.getProtocolVersion(), response.getStatusLine(), result); response.close(); httpClient.close(); return responseBean; } /** * * @param url * @param parts * @param headers * @return * @throws IOException * @throws ClientProtocolException */ public static ResponseBean upload(String url, Map<String, ContentBody> parts, Header[] headers) throws ClientProtocolException, IOException{ // 创建默认的httpClient实例. CloseableHttpClient httpClient = null; if (url.toLowerCase().startsWith(HTTPS)) { httpClient = createSSLClientDefault(); } else { httpClient = HttpClients.createDefault(); } // 把一个普通参数和文件上传给下面这个地址 是一个servlet HttpPost httpPost = new HttpPost(url); if (headers != null && headers.length > 0) { httpPost.setHeaders(headers); } if(parts!=null && !parts.isEmpty()){ MultipartEntityBuilder builder = MultipartEntityBuilder.create().setCharset(Consts.UTF_8); Iterator<Entry<String, ContentBody>> iter = parts.entrySet().iterator(); while (iter.hasNext()) { builder.addPart(iter.next().getKey(), iter.next().getValue()); } httpPost.setEntity(builder.build()); } // 发起请求 并返回请求的响应 CloseableHttpResponse response = httpClient.execute(httpPost); HttpEntity entity = response.getEntity(); String result = EntityUtils.toString(entity, Consts.UTF_8); ResponseBean responseBean = new ResponseBean(response.getAllHeaders(), response.getLocale(), response.getProtocolVersion(), response.getStatusLine(), result); // 销毁 EntityUtils.consume(entity); response.close(); httpClient.close(); return responseBean; } /** * * @param url * @param file * @param headers * @throws IOException * @throws ClientProtocolException */ public static ResponseBean download(String url, File file, Header[] headers) throws ClientProtocolException, IOException{ // 创建默认的httpClient实例. CloseableHttpClient httpClient = null; if (url.toLowerCase().startsWith(HTTPS)) { httpClient = createSSLClientDefault(); } else { httpClient = HttpClients.createDefault(); } HttpGet httpGet = new HttpGet(url); if (headers != null && headers.length > 0) { httpGet.setHeaders(headers); } // 发起请求 并返回请求的响应 CloseableHttpResponse response = httpClient.execute(httpGet); HttpEntity entity = response.getEntity(); ResponseBean responseBean = new ResponseBean(response.getAllHeaders(), response.getLocale(), response.getProtocolVersion(), response.getStatusLine(), null); InputStream in = entity.getContent(); FileUtil.makeFilePath(file); FileOutputStream fout = new FileOutputStream(file); int l = -1; byte[] tmp = new byte[4096]; while ((l = in.read(tmp)) != -1) { fout.write(tmp, 0, l); } fout.flush(); fout.close(); in.close(); response.close(); httpClient.close(); return responseBean; }}封装的response
import java.util.LinkedList;import java.util.List;import java.util.Locale;import org.apache.commons.lang.StringUtils;import org.apache.http.Header;import org.apache.http.ProtocolVersion;import org.apache.http.StatusLine;/** * 在HttpClientUtil中使用 * responseBean * * @author CHHuang * */public class ResponseBean { private Header[] headers; private Locale locale; private ProtocolVersion protocolVersion; private StatusLine statusLine; private String result; public ResponseBean() { super(); } public ResponseBean(Header[] headers, Locale locale, ProtocolVersion protocolVersion, StatusLine statusLine, String result) { super(); this.headers = headers; this.locale = locale; this.protocolVersion = protocolVersion; this.statusLine = statusLine; this.result = result; } public Header[] getHeaders() { return headers; } public Header[] getHeaders(String name) { Header[] nameHeaders = null; if(StringUtils.isNotBlank(name) && headers!=null && headers.length>0){ List<Header> nameHeaderList = new LinkedList<Header>(); for(Header header : headers){ if(name.equalsIgnoreCase(header.getName())){ nameHeaderList.add(header); } } nameHeaders = (Header[]) nameHeaderList.toArray(new Header[nameHeaderList.size()]); } return nameHeaders; } public void setHeaders(Header[] headers) { this.headers = headers; } public Locale getLocale() { return locale; } public void setLocale(Locale locale) { this.locale = locale; } public ProtocolVersion getProtocolVersion() { return protocolVersion; } public void setProtocolVersion(ProtocolVersion protocolVersion) { this.protocolVersion = protocolVersion; } public StatusLine getStatusLine() { return statusLine; } public void setStatusLine(StatusLine statusLine) { this.statusLine = statusLine; } public String getResult() { return result; } public void setResult(String result) { this.result = result; }} 1 0
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