java 上传文件到http服务器_通过java调用Http接口上传图片到服务器

/*** 测试上传png图片

**/

public static voidtestUploadImage(){

String url= "http://localhost:8080/app/remindDetails/doRepair.xhtml";

String fileName= "E:\工作\项目\奇瑞只能制造信息化系统\工作安排\接口设计(20171113-)\1.5.png";

Map textMap = new HashMap();//普通参数：可以设置多个input的name，value

textMap.put("name", "testname");

textMap.put("type", "2");//文件：设置file的name，路径

Map fileMap = new HashMap();

fileMap.put("upfile", fileName);

String contentType= "";//image/png

formUpload(url, textMap, fileMap,contentType);

}/*** 上传图片

*@paramurlStr

*@paramtextMap

*@paramfileMap

*@paramcontentType 没有传入文件类型默认采用application/octet-stream

* contentType非空采用filename匹配默认的图片类型

*@return返回response数据*/@SuppressWarnings("rawtypes")public static String formUpload(String urlStr, MaptextMap,

MapfileMap,String contentType) {

String res= "";

HttpURLConnection conn= null;//boundary就是request头和上传文件内容的分隔符

String BOUNDARY = "---------------------------123821742118716";try{

URL url= newURL(urlStr);

conn=(HttpURLConnection) url.openConnection();

conn.setConnectTimeout(5000);

conn.setReadTimeout(30000);

conn.setDoOutput(true);

conn.setDoInput(true);

conn.setUseCaches(false);

conn.setRequestMethod("POST");

conn.setRequestProperty("Connection", "Keep-Alive");

conn.setRequestProperty("User-Agent","Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)");

conn.setRequestProperty("Content-Type","multipart/form-data; boundary=" +BOUNDARY);

OutputStream out= newDataOutputStream(conn.getOutputStream());//text

if (textMap != null) {

StringBuffer strBuf= newStringBuffer();

Iterator iter=textMap.entrySet().iterator();while(iter.hasNext()) {

Map.Entry entry=(Map.Entry) iter.next();

String inputName=(String) entry.getKey();

String inputValue=(String) entry.getValue();if (inputValue == null) {continue;

}

strBuf.append("rn").append("--").append(BOUNDARY)

.append("rn");

strBuf.append("Content-Disposition: form-data; name=""

+ inputName + ""rnrn");

strBuf.append(inputValue);

System.out.println(inputName+","+inputValue);

}

out.write(strBuf.toString().getBytes());

}//file

if (fileMap != null) {

Iterator iter=fileMap.entrySet().iterator();while(iter.hasNext()) {

Map.Entry entry=(Map.Entry) iter.next();

String inputName=(String) entry.getKey();

String inputValue=(String) entry.getValue();if (inputValue == null) {continue;

}

File file= newFile(inputValue);

String filename=file.getName();//没有传入文件类型，同时根据文件获取不到类型，默认采用application/octet-stream

contentType = newMimetypesFileTypeMap().getContentType(file);//contentType非空采用filename匹配默认的图片类型

if(!"".equals(contentType)){if (filename.endsWith(".png")) {

contentType= "image/png";

}else if (filename.endsWith(".jpg") || filename.endsWith(".jpeg") || filename.endsWith(".jpe")) {

contentType= "image/jpeg";

}else if (filename.endsWith(".gif")) {

contentType= "image/gif";

}else if (filename.endsWith(".ico")) {

contentType= "image/image/x-icon";

}

}if (contentType == null || "".equals(contentType)) {

contentType= "application/octet-stream";

}

StringBuffer strBuf= newStringBuffer();

strBuf.append("rn").append("--").append(BOUNDARY)

.append("rn");

strBuf.append("Content-Disposition: form-data; name=""

+ inputName + ""; filename="" +filename+ ""rn");

System.out.println(inputName+","+filename);

strBuf.append("Content-Type:" + contentType + "rnrn");

out.write(strBuf.toString().getBytes());

DataInputStream in= newDataInputStream(newFileInputStream(file));int bytes = 0;byte[] bufferOut = new byte[1024];while ((bytes = in.read(bufferOut)) != -1) {

out.write(bufferOut,0, bytes);

}

in.close();

}

}byte[] endData = ("rn--" + BOUNDARY + "--rn").getBytes();

out.write(endData);

out.flush();

out.close();//读取返回数据

StringBuffer strBuf = newStringBuffer();

BufferedReader reader= new BufferedReader(newInputStreamReader(

conn.getInputStream()));

String line= null;while ((line = reader.readLine()) != null) {

strBuf.append(line).append("n");

}

res=strBuf.toString();

reader.close();

reader= null;

}catch(Exception e) {

System.out.println("发送POST请求出错。" +urlStr);

e.printStackTrace();

}finally{if (conn != null) {

conn.disconnect();

conn= null;

}

}returnres;

}