ipa 包上传失败

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ipa 包上传会报错，icon 解析失败
javax.imageio.IIOException: Error reading PNG image data
at com.sun.imageio.plugins.png.PNGImageReader.readImage(PNGImageReader.java:1356)
at com.sun.imageio.plugins.png.PNGImageReader.read(PNGImageReader.java:1626)
at javax.imageio.ImageIO.read(ImageIO.java:1462)
at javax.imageio.ImageIO.read(ImageIO.java:1309)
at org.yzr.utils.image.ImageUtils.resize(ImageUtils.java:50)
at org.yzr.service.AppService.storeFiles(AppService.java:222)
at org.yzr.service.AppService.addPackage(AppService.java:163)

java.io.FileNotFoundException: /tmp23bc32f4-1975-480d-a21d-6fde7f6aaaf4.png (Is a directory)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)
at java.io.FileInputStream.(FileInputStream.java:138)
at org.yzr.service.AppService.storeFiles(AppService.java:224)
at org.yzr.service.AppService.addPackage(AppService.java:163)