Question

我的线程将从jar文件中读取类数据，另一个线程将修改或删除jar文件。首先读取订单然后删除，但它不起作用，看起来在阅读后无法释放资源，我怎么能伸出来？

InputStream is = null;
BufferedInputStream bis = null;
ByteArrayOutputStream baos = null;
try {
URL res = new URL(**file**);
is = res.openStream();
bis = new BufferedInputStream(is);
baos = new ByteArrayOutputStream();

byte[] bytes = new byte[1024 * 10];
int readBytes;

while ((readBytes = bis.read(bytes)) != -1) {
    baos.write(bytes, 0, readBytes);
}
byte[] b = baos.toByteArray();
baos.close();
     bis.close();
     is.close();

return b;
} catch (Exception ex) {
throw ex;
}

参数“file”是一个像这样的字符串“jar：file：/// C：/Users/HJ16748/Desktop/test.jar！/com/services/plugin/test/Test.class”

Answer 1

将一个finally添加到try catch块并关闭其中的资源。让两个线程名称为Read和Modify。

在删除或修改jar添加行之前修改线程。

try{
System.out.println("Waiting for read to finish");
read.thread.join();
}catch(InterruptedException e){
System.out.println("not able to join");//oops catch
}
//codes to delete or modify jar

用read调用的线程是Thread对象

Answer 2

ZipFile zf = new ZipFile(entry);
file = file.replaceAll("\\\\", "/");
ZipEntry zipEntry = zf.getEntry(file);

BufferedInputStream bis = new BufferedInputStream(zf.getInputStream(zipEntry));
ByteArrayOutputStream baos = new ByteArrayOutputStream();

byte[] bytes = new byte[1024 * 10];
int readBytes;

while ((readBytes = bis.read(bytes)) != -1) {
    baos.write(bytes, 0, readBytes);
}
b = baos.toByteArray();

baos.close();
bis.close();
zf.close();

读取jar中的文件，但无法删除它

2 个答案: