java HttpURLConnection 发送文件和字符串信息

2024-02-19 11:49:03 41

javaHttpURLConnection发送文件和字符串信息

以文件的形式传参

/**
*通过拼接的方式构造请求内容，实现参数传输以及文件传输
*
*@paramactionUrl访问的服务器URL
*@paramparams普通参数
*@paramfiles文件参数
*@return
*@throwsIOException
*/
publicstaticvoidpost(StringactionUrl,Mapparams,Mapfiles)throwsIOException
{

StringBOUNDARY=java.util.UUID.randomUUID().toString();
StringPREFIX="--",LINEND="\r\n";
StringMULTIPART_FROM_DATA="multipart/form-data";
StringCHARSET="UTF-8";

URLuri=newURL(actionUrl);
HttpURLConnectionconn=(HttpURLConnection)uri.openConnection();
conn.setReadTimeout(5*1000);//缓存的最长时间
conn.setDoInput(true);//允许输入
conn.setDoOutput(true);//允许输出
conn.setUseCaches(false);//不允许使用缓存
conn.setRequestMethod("POST");
conn.setRequestProperty("connection","keep-alive");
conn.setRequestProperty("Charsert","UTF-8");
conn.setRequestProperty("Content-Type",MULTIPART_FROM_DATA+";boundary="+BOUNDARY);

//首先组拼文本类型的参数
StringBuildersb=newStringBuilder();
for(Map.Entryentry:params.entrySet())
{
sb.append(PREFIX);
sb.append(BOUNDARY);
sb.append(LINEND);
sb.append("Content-Disposition:form-data;name=\""+entry.getKey()+"\""+LINEND);
sb.append("Content-Type:text/plain;charset="+CHARSET+LINEND);
sb.append("Content-Transfer-Encoding:8bit"+LINEND);
sb.append(LINEND);
sb.append(entry.getValue());
sb.append(LINEND);
}

DataOutputStreamoutStream=newDataOutputStream(conn.getOutputStream());
outStream.write(sb.toString().getBytes());
InputStreamin=null;
//发送文件数据
if(files!=null)
{
for(Map.Entryfile:files.entrySet())
{
StringBuildersb1=newStringBuilder();
sb1.append(PREFIX);
sb1.append(BOUNDARY);
sb1.append(LINEND);
//name是post中传参的键filename是文件的名称
sb1.append("Content-Disposition:form-data;name=\"file\";filename=\""+file.getKey()+"\""+LINEND);
sb1.append("Content-Type:application/octet-stream;charset="+CHARSET+LINEND);
sb1.append(LINEND);
outStream.write(sb1.toString().getBytes());

InputStreamis=newFileInputStream(file.getValue());
byte[]buffer=newbyte[1024];
intlen=0;
while((len=is.read(buffer))!=-1)
{
outStream.write(buffer,0,len);
}

is.close();
outStream.write(LINEND.getBytes());
}

//请求结束标志
byte[]end_data=(PREFIX+BOUNDARY+PREFIX+LINEND).getBytes();
outStream.write(end_data);
outStream.flush();
//得到响应码
intres=conn.getResponseCode();
if(res==200)
{
in=conn.getInputStream();
intch;
StringBuildersb2=newStringBuilder();
while((ch=in.read())!=-1)
{
sb2.append((char)ch);
}
}
outStream.close();
conn.disconnect();
}
//returnin.toString();
}

以数据流的形式传参

publicstaticStringpostFile(StringactionUrl,Mapparams,Mapfiles)
throwsException
{
StringBuildersb2=null;
StringBOUNDARY=java.util.UUID.randomUUID().toString();
StringPREFIX="--",LINEND="\r\n";
StringMULTIPART_FROM_DATA="multipart/form-data";
StringCHARSET="UTF-8";

URLuri=newURL(actionUrl);
HttpURLConnectionconn=(HttpURLConnection)uri.openConnection();
conn.setReadTimeout(6*1000);//缓存的最长时间
conn.setDoInput(true);//允许输入
conn.setDoOutput(true);//允许输出
conn.setUseCaches(false);//不允许使用缓存
conn.setRequestMethod("POST");
conn.setRequestProperty("connection","keep-alive");
conn.setRequestProperty("Charsert","UTF-8");
conn.setRequestProperty("Content-Type",MULTIPART_FROM_DATA+";boundary="+BOUNDARY);

//首先组拼文本类型的参数
StringBuildersb=newStringBuilder();
for(Map.Entryentry:params.entrySet())
{
sb.append(PREFIX);
sb.append(BOUNDARY);
sb.append(LINEND);
sb.append("Content-Disposition:form-data;name=\""+entry.getKey()+"\""+LINEND);
sb.append("Content-Type:text/plain;charset="+CHARSET+LINEND);
sb.append("Content-Transfer-Encoding:8bit"+LINEND);
sb.append(LINEND);
sb.append(entry.getValue());
sb.append(LINEND);
}

DataOutputStreamoutStream=newDataOutputStream(conn.getOutputStream());
outStream.write(sb.toString().getBytes());
InputStreamin=null;
//发送文件数据
if(files!=null)
{
for(Map.Entryfile:files.entrySet())
{
StringBuildersb1=newStringBuilder();
sb1.append(PREFIX);
sb1.append(BOUNDARY);
sb1.append(LINEND);
sb1.append("Content-Disposition:form-data;name=\"pic\";filename=\""+file.getKey()+"\""+LINEND);
sb1.append("Content-Type:application/octet-stream;charset="+CHARSET+LINEND);
sb1.append(LINEND);
outStream.write(sb1.toString().getBytes());

//InputStreamis=newFileInputStream(file.getValue());
//byte[]buffer=newbyte[1024];
//intlen=0;
//while((len=is.read(buffer))!=-1)
//{
//outStream.write(buffer,0,len);
//}
//is.close();
outStream.write(file.getValue());

outStream.write(LINEND.getBytes());
}

//请求结束标志
byte[]end_data=(PREFIX+BOUNDARY+PREFIX+LINEND).getBytes();
outStream.write(end_data);
outStream.flush();
//得到响应码
intres=conn.getResponseCode();
if(res==200)
{
in=conn.getInputStream();
intch;
sb2=newStringBuilder();
while((ch=in.read())!=-1)
{
sb2.append((char)ch);
}
System.out.println(sb2.toString());
}
outStream.close();
conn.disconnect();
//解析服务器返回来的数据
returnParseJson.getEditMadIconResult(sb2.toString());
}
else
{
return"UpdateiconFail";
}
//returnin.toString();
}

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java HttpURLConnection 发送文件和字符串信息

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