JAVA反射技术应用-ReflectUtil

来源：互联网发布：java jackson 编辑：程序博客网时间：2024/06/05 15:52

public class ReflectUtil {

//不区分大小写
public static Object setFieldValueDefault(Object target, String fname,
   Class ftype, Object fvalue) {
  if (target == null
    || fname == null
    || "".equals(fname)
    || (fvalue != null && !ftype
      .isAssignableFrom(fvalue.getClass()))) {
   return target;
  }
  Class clazz = target.getClass();
  Field[] fs = clazz.getDeclaredFields();
  try {
   for (int i = 0; i < fs.length; i++) {
    if (fname.toLowerCase().equals(fs[i].getName().toLowerCase())) {
     Method method = clazz.getDeclaredMethod("set"
       + Character.toUpperCase(fs[i].getName().charAt(0))
       + fs[i].getName().substring(1), String.class);
     if (!Modifier.isPublic(method.getModifiers())) {
      method.setAccessible(true);
     }
     method.invoke(target, fvalue);
    }
   }
  } catch (Exception me) {
   try {
    Field field = clazz.getDeclaredField(fname);
    if (!Modifier.isPublic(field.getModifiers())) {
     field.setAccessible(true);
    }
    field.set(target, fvalue);
   } catch (Exception fe) {
    fe.getStackTrace();
   }
  }
  return target;
}

//区分大小写

public static Object setFieldValue(Object target, String fname, Class ftype,
   Object fvalue) {
  if (target == null
    || fname == null
    || "".equals(fname)
    || (fvalue != null && !ftype
      .isAssignableFrom(fvalue.getClass()))) {
   return target;
  }
  Class clazz = target.getClass();
  Field[] fs = clazz.getDeclaredFields();
  try {
   Method method = clazz.getDeclaredMethod("set"
     + Character.toUpperCase(fname.charAt(0))
     + fname.substring(1), String.class);
   if (!Modifier.isPublic(method.getModifiers())) {
    method.setAccessible(true);
   }
   method.invoke(target, fvalue);
  } catch (Exception me) {
   try {
    Field field = clazz.getDeclaredField(fname);
    if (!Modifier.isPublic(field.getModifiers())) {
     field.setAccessible(true);
    }
    field.set(target, fvalue);
   } catch (Exception fe) {
    fe.getStackTrace();
   }
  }
  return target;
}

public static Object getFieldValue(Object target, String fname, Class ftype) {
  if (target == null || fname == null || "".equals(fname)) {
   return null;
  }
  Class clazz = target.getClass();
  try {
   Method method = clazz.getDeclaredMethod("get"
     + Character.toUpperCase(fname.charAt(0))
     + fname.substring(1), ftype);
   if (!Modifier.isPublic(method.getModifiers())) {
    method.setAccessible(true);
   }
   return method.invoke(target);
  } catch (Exception me) {
   try {
    Field field = clazz.getDeclaredField(fname);
    if (!Modifier.isPublic(field.getModifiers())) {
     field.setAccessible(true);
    }
    return field.get(target);
   } catch (Exception fe) {
    fe.getStackTrace();
   }
  }
  return null;
}
}