java中怎么把文件上传到服务器的指定路径？

文件从本地到服务器的功能，其实是为了解决目前浏览器不支持获取本地文件全路径。不得已而想到上传到服务器的固定目录，从而方便项目获取文件，进而使程序支持EXCEL批量导入数据。

java中文件上传到服务器的指定路径的代码：

在前台界面中输入：

<form method="post" enctype="multipart/form-data"  action="../manage/excelImport.do">

请选文件:<input type="file"  name="excelFile">

<input type="submit" value="导入" onclick="return impExcel()"/>

</form>

action中获取前台传来数据并保存

/**

* excel 导入文件

* @return

* @throws IOException

*/

@RequestMapping("/usermanager/excelImport.do")

public String excelImport(

String filePath,

MultipartFile  excelFile,HttpServletRequest request) throws IOException{

log.info("<<<<<<action:{} Method:{} start>>>>>>","usermanager","excelImport" )

if (excelFile != null){

String filename=excelFile.getOriginalFilename()

String a=request.getRealPath("u/cms/www/201509")

SaveFileFromInputStream(excelFile.getInputStream(),request.getRealPath("u/cms/www/201509"),filename)//保存到服务器的路径

}

log.info("<<<<<<action:{} Method:{} end>>>>>>","usermanager","excelImport" )

return ""

}

/**

* 将MultipartFile转化为file并保存到服务器上的某地

*/

public void SaveFileFromInputStream(InputStream stream,String path,String savefile) throws IOException

{    

FileOutputStream fs=new FileOutputStream( path + "/"+ savefile)

System.out.println("------------"+path + "/"+ savefile)

byte[] buffer =new byte[1024*1024]

int bytesum = 0

int byteread = 0

while ((byteread=stream.read(buffer))!=-1)

{

bytesum+=byteread

fs.write(buffer,0,byteread)

fs.flush()

}

fs.close()

stream.close()

}

package com.letv.dir.cloud.utilimport com.letv.dir.cloud.controller.DirectorWatermarkControllerimport org.slf4j.Loggerimport org.slf4j.LoggerFactoryimport java.io.*import java.net.HttpURLConnectionimport java.net.MalformedURLExceptionimport java.net.URL/** * Created by xijunge on 2016/11/24 0024. */public class HttpRequesterFile {private static final Logger log = LoggerFactory.getLogger(HttpRequesterFile.class) private static final String TAG = "uploadFile" private static final int TIME_OUT = 100 * 1000// 超时时间private static final String CHARSET = "utf-8"// 设置编码/** *上传文件到服务器 * * @param file *需要上传的文件 * @param RequestURL *文件服务器的rul * @return 返回响应的内容 * */public static String uploadFile(File file, String RequestURL) throws IOException {

String result = null

String BOUNDARY = "letv"// 边界标识 随机生成String PREFIX = "--", LINE_END = "\r\n"

String CONTENT_TYPE = "multipart/form-data"// 内容类型try {

URL url = new URL(RequestURL)

HttpURLConnection conn = (HttpURLConnection) url.openConnection()

conn.setReadTimeout(TIME_OUT)

conn.setConnectTimeout(TIME_OUT)

conn.setDoInput(true)// 允许输入流conn.setDoOutput(true)// 允许输出流conn.setUseCaches(false)// 不允许使用缓存conn.setRequestMethod("POST")// 请求方式conn.setRequestProperty("Charset", CHARSET)// 设置编码conn.setRequestProperty("connection", "keep-alive")

conn.setRequestProperty("Content-Type", CONTENT_TYPE + "boundary="+ BOUNDARY)

---