java中GZIPOutputStream 流的使用（EOFException）

GZip流的使用非常多人都出现了以下的异常：java.io.EOFException: Unexpected end of ZLIB input stream。或者出现压缩后的数据不全的情况（就是压缩的数据仅仅是原数据的一部分，不能被解压缩）

原因是在使用GZIPOutputStream 对象的时候没有调用close方法.

如：

@org.junit.Test
    public void test(){
        try {
            ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();
            byte[] original="asdfasfasfasfsafsadfasfasfasfasfasdfasdasfsasdfasfsafsafsadsafsadsadfasffasdfsafdasf！".getBytes();
            System.out.println("original:"+original.length);
            //byteArrayOutputStream.write(original);
            GZIPOutputStream gzipOutputStream=new GZIPOutputStream(byteArrayOutputStream);
            gzipOutputStream.write(original);
            //这里一定要先把gzipOutputStream流关闭了，否则得到的是部分数据,而且以下在解压缩的时候会出现EOFException异常
            gzipOutputStream.close();
            byteArrayOutputStream.close();
            byte[] compressByteArray = byteArrayOutputStream.toByteArray();
            System.out.println("compress:"+compressByteArray.length);
            //解压缩
            GZIPInputStream gunzip = new GZIPInputStream(new ByteArrayInputStream(compressByteArray));
            ByteArrayOutputStream compressByteArrayOut=new ByteArrayOutputStream();
            byte[] buffer=new byte[4096];
            int temp=-1;
            while((temp=gunzip.read(buffer))>0){
                compressByteArrayOut.write(buffer, 0, temp);
            }
            byte[] unCompressByte = compressByteArrayOut.toByteArray();
            System.out.println("uncompress:"+unCompressByte.length);
            gunzip.close();
            compressByteArrayOut.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

上面的代码假设没有调用：gzipOutputStream.close(); 程序将会出现：java.io.EOFException: Unexpected end of ZLIB input stream。

java.io.EOFException: Unexpected end of ZLIB input stream
    at java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:240)
    at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
    at java.util.zip.GZIPInputStream.read(GZIPInputStream.java:116)
    at java.io.FilterInputStream.read(FilterInputStream.java:107)
    at com.searow.test.Object2ByteArray.test(Object2ByteArray.java:145)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

正确的执行结果：

original:87
compress:57
uncompress:87