Java反射機制獲取內部類的靜態成員

　　最近需要些一個可配置的索引構建程序需要在運行時調用Lucene包的如下類及其成員

　　引用

　　Nested Class Summary

　　static class FieldIndex

　　Specifies whether and how a field should be indexed

　　static class FieldStore

　　Specifies whether and how a field should be stored

　　static class FieldTermVector

　　Specifies whether and how a field should have term vectors

　　lucene api中稱之為Nested Class意為嵌套類而嵌套類內部的FileIndex的成員又是靜態成員

　　引用

　　Field Summary

　　static FieldIndex ANALYZED

　　Index the tokens produced by running the fields value through an Analyzer

　　static FieldIndex ANALYZED_NO_NORMS

　　Expert: Index the tokens produced by running the fields value through an Analyzer and also separately disable the storing of norms

　　static FieldIndex NO

　　Do not index the field value

　　static FieldIndex NO_NORMS

　　Deprecated This has been renamed to NOT_ANALYZED_NO_NORMS

　　static FieldIndex NOT_ANALYZED

　　Index the fields value without using an Analyzer so it can be searched

　　static FieldIndex NOT_ANALYZED_NO_NORMS

　　Expert: Index the fields value without an Analyzer and also disable the storing of norms

　　static FieldIndex TOKENIZED

　　Deprecated this has been renamed to ANALYZED

　　static FieldIndex UN_TOKENIZED

　　Deprecated This has been renamed to NOT_ANALYZED

　　一個棘手的問題如果獲得這些內部靜態成員？

　　最後采用了如下方法

　　//運行時調用FiledIndex類型

　　Java代碼

　　Class<?> cls = orgapachelucenedocumentFieldIndexclass;

　　javalangreflectField indexDeclareField = clsgetDeclaredField(fieldgetIndex());

　　Object indexDeclareFieldType = indexDeclareFieldget(cls);

　　orgapachelucenedocumentFieldIndex filedIndex = (orgapachelucenedocumentFieldIndex)indexDeclareFieldType;

　　//運行時調用FieldStore類型

　　Class<?> clsStore = orgapachelucenedocumentFieldIndexclass;

　　javalangreflectField storeDeclareField = clsgetDeclaredField(fieldgetIndex());

　　Object indexStoreDeclareField = indexDeclareFieldget(cls);

　　orgapachelucenedocumentFieldStore filedStore = (orgapachelucenedocumentFieldStore)indexStoreDeclareField;

From:http://tw.wingwit.com/Article/program/Java/hx/201311/26078.html