Json-lib在将Hibernate对象转成JsonString时的Exception解决办法

本文介绍了一种在使用Json-Lib将Hibernate对象转换为JSON字符串时遇到的问题及解决方案。当直接转换时可能会出现异常,文章提供了一种通过配置JsonConfig来排除特定属性的方法避免异常。

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在使用Json-Lib将Java对象转成JsonString时,一般情况下,我们都使用JSONObject.fromObject(Java 对象) 就可以了。但是在使用hibernate来操作数据库得到对象进行转换时就会抛出异常。

异常为:

JSONObject.fromObject(hibernate对象)
出现以下Exception

net.sf.json.JSONException: java.lang.reflect.InvocationTargetException
net.sf.json.JSONObject._fromBean(JSONObject.java:959)

detaiMessage:Positioned Update not supported

解决方法如下 :使用以下代码来
JsonConfig jsonConfig=new JsonConfig();
jsonConfig.setExcludes(new String[]{"handler","hibernateLazyInitializer"});
JSONObject.fromObject(hibernate对象,jsonConfig);
public static void main(String[] args) throws TesseractException { // 识别图片的路径(修改为自己的图片路径) String path = "D:\\pdf\\Snipaste_2025-07-17_07-59-02.jpg"; // 语言库位置(修改为跟自己语言库文件夹的路径) String lagnguagePath = "D:\\maven_use\\lingxi-lhc\\lingxi-ai-extend\\lingxi-ai-comparison\\src\\main\\resources\\tessdata"; File file = new File(path); ITesseract instance = new Tesseract(); // 设置训练库的位置 instance.setDatapath(lagnguagePath); instance.setLanguage("eng"); instance.setPageSegMode(6); instance.setOcrEngineMode(1); String result = instance.doOCR(file); System.out.println(result); }C:\Java\jdk-17\bin\java.exe "-javaagent:D:\work\IntelliJ IDEA 2024.3\lib\idea_rt.jar=51929:D:\work\IntelliJ IDEA 2024.3\bin" -Dfile.encoding=UTF-8 -classpath 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com.luxsan.service.bb 18:42:34.862 [main] ERROR net.sourceforge.tess4j.Tesseract -- Not a JPEG file: starts with 0x89 0x50 javax.imageio.IIOException: Not a JPEG file: starts with 0x89 0x50 at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.readImageHeader(Native Method) at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.readNativeHeader(JPEGImageReader.java:739) at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.checkTablesOnly(JPEGImageReader.java:354) at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.getNumImagesOnThread(JPEGImageReader.java:434) at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.getNumImages(JPEGImageReader.java:400) at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:236) at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:210) at com.luxsan.service.bb.main(bb.java:32) Exception in thread "main" net.sourceforge.tess4j.TesseractException: javax.imageio.IIOException: Not a JPEG file: starts with 0x89 0x50 at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:261) at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:210) at com.luxsan.service.bb.main(bb.java:32) Caused by: javax.imageio.IIOException: Not a JPEG file: starts with 0x89 0x50 at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.readImageHeader(Native Method) at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.readNativeHeader(JPEGImageReader.java:739) at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.checkTablesOnly(JPEGImageReader.java:354) at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.getNumImagesOnThread(JPEGImageReader.java:434) at java.desktop/com.sun.imageio.plugins.jpeg.JPEGImageReader.getNumImages(JPEGImageReader.java:400) at net.sourceforge.tess4j.Tesseract.doOCR(Tesseract.java:236) ... 2 more报错为什么
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07-18
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