java map转Multipart/form-data类型body实例

2023-07-25 19:34:14 176

publicstaticStringmapToTxt(MapfieldMap,MapfileMap,StringfileName)throwsException{ Randomrandom=newRandom(); intj; StringgetLine="\r\n"; StringfileType="Content-Type:application/octet-stream"; StringdoubleBar="--"; biaoshi="----WebKitFormBoundary"; StringBuffersb=newStringBuffer(); for(inti=0;i<16;i++){ j=random.nextInt(MULTIPART_CHARS.length-2)+2; sb.append(MULTIPART_CHARS[j]); } biaoshi=biaoshi+sb.toString(); StringBufferstringBuffer=newStringBuffer(); for(Map.Entryentity:fieldMap.entrySet()){ Stringname="Content-Disposition:form-data;name=\""+entity.getKey()+"\""; stringBuffer.append(doubleBar+biaoshi); stringBuffer.append(getLine); stringBuffer.append(name); stringBuffer.append(getLine); stringBuffer.append(getLine); stringBuffer.append(entity.getValue()); stringBuffer.append(getLine); } for(Map.Entryentity:fileMap.entrySet()){ Stringname="Content-Disposition:form-data;name=\""+fileName+"\";filename=\""+entity.getValue().getName()+"\""; stringBuffer.append(doubleBar+biaoshi); stringBuffer.append(getLine); stringBuffer.append(name); stringBuffer.append(getLine); stringBuffer.append(fileType); stringBuffer.append(getLine); stringBuffer.append(getLine); Filef=entity.getValue(); FileInputStreamfileInputStream=newFileInputStream(f); ByteArrayOutputStreambyteArrayOutputStream=newByteArrayOutputStream(); byteby[]=newbyte[1024]; intk=0; while((k=fileInputStream.read(by))!=-1){ byteArrayOutputStream.write(by,0,k); } by=byteArrayOutputStream.toByteArray(); for(inti=0;i

补充知识：java如何取出传参数格式为form-data中的值

publicMapTest(HttpServletRequestrequest,HttpServletRequestresponse)throwsException{
MapreturnMap=newHashMap();
Stringa=request.getParameter("a");//取出form-data中a的值
Stringb=request.getParameter("b");//取出form-data中a的值
//取出form-data中的二进制字段
MultipartHttpServletRequestmultipartRequest=(MultipartHttpServletRequest)request;
MultipartFilemultipartFile=multipartRequest.getFile("file");//file是form-data中二进制字段对应的name
System.out.println(multipartFile.getSize());
MapresultMapsReturn=newHashMap<>();
StringimagePath="C:\\Users\\win\\Desktop\\1.jpg"//把取出来的二进制保存图片到本地
if(multipartFile.getSize()<=0){
resultMapsReturn.put("resultcode","0");
resultMapsReturn.put("msg",DisWebConst.ERROR_TITLE);
}else{
InputStreamis=multipartFile.getInputStream();

OutputStreamout=newFileOutputStream(imagePath);
IOUtils.copy(is,out);
is.close();
out.close();
}

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java map转Multipart/form-data类型body实例

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