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

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