【发布时间】：2020-08-27 21:56:08
【问题描述】：
我使用 Tabula (java) 来提取 pdf 文件中包含的表格。在获得一个表列表后，我使用 Gson 类来实现这个列表。但是，会引发以下异常。
表格提取和序列化
List<Table> tables = new PDFTableExtractor(document).extract(page);
new Gson().toJson(tables);
抛出异常
java.lang.IllegalArgumentException: jdk.internal.ref.PhantomCleanable<?> declares multiple JSON fields named next
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:172)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getAdapter(Gson.java:458)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
at com.google.gson.Gson.getAdapter(Gson.java:458)
我正在使用 Tabula 库中的 Table 类。该类包含以下属性：
private final String extractionMethod;
private int rowCount = 0;
private int colCount = 0;
private List<List<RectangularTextContainer>> memoizedRows = null;
/* visible for testing */ final TreeMap<CellPosition, RectangularTextContainer> cells = new TreeMap<>();
【问题讨论】：
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数据是什么样的？
Table类中有哪些字段？ -
我正在使用表格库中的 Table 类。该类包含以下属性：
private final String extractionMethod; private int rowCount = 0; private int colCount = 0; private List<List<RectangularTextContainer>> memoizedRows = null; /* visible for testing */ final TreeMap<CellPosition, RectangularTextContainer> cells = new TreeMap<>(); -
我会打开图书馆的问题。序列化可能不是很容易。
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请edit 更新问题的细节而不是评论。
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问题已更新