java.io.EOFException: Unexpected end of ZLIB input stream解决

秒速五厘米 2022-06-09 23:59 215阅读 0赞

`EOFException` 表示异常文件结尾，说明读取的数据是不完整的。我在线上就遇到过类似的问题，在请求高峰时期就抛出了这个异常。下面是我的代码：

FileOutputStream fileOutputStream = null;
            try {
                //得到文件
                File file = new File(fileName);
                fileOutputStream = new FileOutputStream(file);
                IOUtils.write(dataByte, fileOutputStream);
                // 在这里及时的close掉fileOutputStream
                //读取图片
                BufferedImage bi = ImageIO.read(file);
    
                pictureProcessVo.setWidth(bi.getWidth()); //获得 宽度
                pictureProcessVo.setHeight(bi.getHeight()); //获得 高度
                // other operation
                // delete file
                FileUtils.deleteQuietly(file);
            } catch (Exception e) {
                LOGGER.error("get pic width and height error", e);
            } finally {
                IOUtils.closeQuietly(fileOutputStream);
            }

出现的异常：

javax.imageio.IIOException: Error reading PNG image data
        at com.sun.imageio.plugins.png.PNGImageReader.readImage(PNGImageReader.java:1345)
        at com.sun.imageio.plugins.png.PNGImageReader.read(PNGImageReader.java:1614)
        at javax.imageio.ImageIO.read(ImageIO.java:1448)
        at javax.imageio.ImageIO.read(ImageIO.java:1308)
        at me.ele.commodity.spu.service.impl.CommodityDataProcessServiceImpl.downloadPicture(CommodityDataProcessServiceImpl.java:164)
        at me.ele.commodity.spu.service.impl.CommodityDataProcessServiceImpl.getCheckedPicList(CommodityDataProcessServiceImpl.java:207)
        at me.ele.commodity.spu.service.impl.CommodityDataProcessServiceImpl.asyncPictureListAndDataLog(CommodityDataProcessServiceImpl.java:88)
        at sun.reflect.GeneratedMethodAccessor327.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
        at org.springframework.aop.interceptor.AsyncExecutionInterceptor$1.call(AsyncExecutionInterceptor.java:115)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:748)
    Caused by: 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.io.BufferedInputStream.fill(BufferedInputStream.java:246)
        at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
        at java.io.DataInputStream.readFully(DataInputStream.java:195)
        at com.sun.imageio.plugins.png.PNGImageReader.decodePass(PNGImageReader.java:1119)
        at com.sun.imageio.plugins.png.PNGImageReader.decodeImage(PNGImageReader.java:1223)
        at com.sun.imageio.plugins.png.PNGImageReader.readImage(PNGImageReader.java:1338)
        ... 17 more

当往输出流fileOutputStream里写数据的时候，如果fileOutputStream没有及时的close掉，导致数据不完整。在一个流里，close操作可以将缓冲的数据给冲出来，或会在生成的文件里填充一些信息。所以往输出流里写数据然后到一个具体的文件，及时的close掉输出流是很有必要的。

另外这个代码也是有问题的，并发访问的时候，如果图片文件名相同也会导致生成的图片出现问题，`线程1`读取data byte array生成了`图片1`，准备去读取`图片1`，然后`线程2`开始生成相同文件名的图片去覆盖`图片1`，然后`线程1`读取到了数据不完整的`图片1` 而出现异常。

可以参考另外一个例子：  
[http://blog.csdn.net/Revivedsun/article/details/52073554][http_blog.csdn.net_Revivedsun_article_details_52073554]

[http_blog.csdn.net_Revivedsun_article_details_52073554]: http://blog.csdn.net/Revivedsun/article/details/52073554