2 u013031331 u013031331 于 2015.06.23 22:28 提问

jsp 用 RandomAccessFile上传文件
      File a=new File("D:/ceshi/2/2.txt");
        FileOutputStream a1=new FileOutputStream(a);
        InputStream b1=request.getInputStream();
        byte v[]=new byte[20000];
        int n;
        while((n=b1.read(v))!=-1)
        a1.write(v, 0, n);
        a1.close();
        b1.close();
        String filename="t.txt";
        byte cc[]=filename.getBytes("ISO-8859-1");
        filename=new String(cc);
           File c1=new File("D:/ceshi/2/"+filename);
           RandomAccessFile randomwrite=new RandomAccessFile(c1,"rw");
        RandomAccessFile randomread=new RandomAccessFile(a,"r");
        int second=1;
        String secondLine=null;
        while(second<=2)
        {
        secondLine=randomread.readLine();
        second++;
        }

        randomread.seek(0);
        long four=0;
        int four1=1;
        while((n=randomread.readByte())!=-1&&(four1<=4))
        {
        if(n=='\n')
        {
        four=randomread.getFilePointer();
        four1++;
        }
        }
    randomread.seek(randomread.length());
    long end=randomread.getFilePointer();

    int j=1;
    while( (end>=0) && (j<6))  
        {
              end--;
    randomread.seek(end);
     n=randomread.readByte();

        if(n=='\n')
        {
        end=randomread.getFilePointer();
        j++;
        }
        randomread.seek(four);
        while(four<end-1)
        {
        n=randomread.readByte();
        randomwrite.write(n);
        four=randomread.getFilePointer();
        }
        randomread.close();
        randomwrite.close();



        }

每次传完 文件后面都有一行多余的代码

2个回答

u013031331
u013031331   2015.06.23 22:44

上传的最后一句总是多一句这个
------WebKitFormBoundaryqrFPvEjtqVRR9SD7--

devmiao
devmiao   Ds   Rxr 2015.06.23 23:15

用fiddler调试下,看看提交的请求是不是有问题。

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