关于使用反射机制得到泛型的字段名的有关问题
关于使用反射机制得到泛型的字段名的问题
1、实体类
public class LSLSEntry { private String storeguid; private String checkguid; private String isstoprunning; public String _5801; public String _5802; public String _5803; public String _6001; public String _6002; public String _6003; public String _6101; public String _6201; public String _6301; public String _6401; public String _6501; public String _6502; public String _6601; public String _6602; public String _6701; public String _6702; public String _6703; public String _6704; public String _6801; public String _6802; public String _6803; public String _6804; public String _6805; public String _7201; public String _7401; public String _7402; public String _7403; public String _7404; public String _7601; public String _7701; public String _7702; public String _7703; public String _7704; public String _7705; public String _7706; public String _7707; public String _7708; public String _7709; public String _7801; public String _7802; public String _8001; public String _8101; public String _8102; public String _8103; public String _8104; public String _8105; public String _8106; public String _8107; public String _8108; public String _8109; public String _8110; public String _8111; public String _8112; public String _8201; public String _8301; public String _8401; public String _8402; public String _8403; public String _8404; public String getStoreguid() { return storeguid; } public void setStoreguid(String storeguid) { this.storeguid = storeguid; } public String getCheckguid() { return checkguid; } public void setCheckguid(String checkguid) { this.checkguid = checkguid; } public String getIsstoprunning() { return isstoprunning; } public void setIsstoprunning(String isstoprunning) { this.isstoprunning = isstoprunning; } }
2、反射代码
import java.lang.reflect.Field; import org.junit.Test; public class TestReflect { @Test public void test() { //可以得到字段名 LSLSEntry entry = new LSLSEntry(); printValue(entry); } @Test public void test1() { //得不到字段名,为什么??? printValue(LSLSEntry.class); } @Test public void test2() { //得不到字段名,为什么?? PrintInfo2<LSLSEntry> info = new PrintInfo2<LSLSEntry>(LSLSEntry.class); info.printValue(); } @Test public void test3() { //可以得到字段名 LSLSEntry entry = new LSLSEntry(); PrintInfo<LSLSEntry> info = new PrintInfo<LSLSEntry>(entry); info.printValue(); } @Test public void test4() { //可以得到字段名 Field[] fields = LSLSEntry.class.getFields(); for (Field f : fields) { System.out.println(f.getName()); } } private <T> void printValue(T entry) { Field[] fields = entry.getClass().getFields(); for (Field f : fields) { System.out.println(f.getName()); } } private class PrintInfo<T> { T entry; public PrintInfo(T entry) { this.entry = entry; } private void printValue() { Field[] fields = entry.getClass().getFields(); for (Field f : fields) { System.out.println(f.getName()); } } } private class PrintInfo2<T> { Class<?> entry; public PrintInfo2(Class<?> entry) { this.entry = entry; } private void printValue() { Field[] fields = entry.getClass().getFields(); for (Field f : fields) { System.out.println(f.getName()); } } } }在做项目的时候遇到这个问题,在反射泛型的字段时,只要将要反射的类实例化之后,反射其所对应的引用才能得到其字段,而直接反射类得不到。
网上查询了好长时间没有找到答案,贴出来,求答案……