各位前輩，我使用谷歌的ZXing創(chuàng)建二維碼，按照網(wǎng)上的例子寫。剛開始可以運行，然后我在其他Service里面打了個斷點，調(diào)試了一下其他問題，再運行這個地方就報錯了。例子： BitMatrix matrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE,width,height,hints); Path file = new File("C:/Users/Administrator/Desktop/SpringBoot/img.png").toPath(); MatrixToImageWriter.writeToPath(matrix,format,file); 錯誤信息出在這一步： MatrixToImageWriter.writeToPath(matrix,format,file); 報錯信息是：Caught and handled this exception :java.lang.NumberFormatException: For input string: "" at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) at java.base/java.lang.Integer.parseInt(Integer.java:662) at java.base/java.lang.Integer.parseInt(Integer.java:770) at com.github.jaiimageio.impl.common.ImageUtil.processOnRegistration(ImageUtil.java:1401) at com.github.jaiimageio.impl.plugins.bmp.BMPImageReaderSpi.onRegistration(BMPImageReaderSpi.java:97) at java.desktop/javax.imageio.spi.SubRegistry.registerServiceProvider(ServiceRegistry.java:788) at java.desktop/javax.imageio.spi.ServiceRegistry.registerServiceProvider(ServiceRegistry.java:330) at java.desktop/javax.imageio.spi.IIORegistry.registerApplicationClasspathSpis(IIORegistry.java:212) at java.desktop/javax.imageio.spi.IIORegistry.<init>(IIORegistry.java:136) at java.desktop/javax.imageio.spi.IIORegistry.getDefaultInstance(IIORegistry.java:157) at java.desktop/javax.imageio.ImageIO.<clinit>(ImageIO.java:66) at com.google.zxing.client.j2se.MatrixToImageWriter.writeToPath(MatrixToImageWriter.java:129) at com.google.zxing.client.j2se.MatrixToImageWriter.writeToPath(MatrixToImageWriter.java:100) at com.scut.originsystem.util.QRCodeUtil.createQRCode(QRCodeUtil.java:42) at com.scut.originsystem.service.QRCodeService.qRCodeWord(QRCodeService.java:162) at com.scut.originsystem.service.QRCodeService.asyncQRCodeWord(QRCodeService.java:146) at com.scut.originsystem.service.QRCodeService$$FastClassBySpringCGLIB$$a6aa6547.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.aop.interceptor.AsyncExecutionInterceptor$1.call(AsyncExecutionInterceptor.java:115) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.lang.Thread.run(Thread.java:844) 報錯的源碼是：String jvmVendor = System.getProperty("java.vendor"); String jvmVersionString = System.getProperty("java.specification.version"); int verIndex = jvmVersionString.indexOf("1."); jvmVersionString = jvmVersionString.substring(verIndex + 2); int jvmVersion = Integer.parseInt(jvmVersionString); 這里顯示jvmVersionString為空，無法轉(zhuǎn)換為int。這是API的BUG么，應(yīng)該如何修改？為什么之前可以運行？請各位前輩指導(dǎo)。