java利用反射实现动态代理示例

复制代码 代码如下:
package com.et59.cus.domain.dao.ex;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

import org.apache.log4j.Logger;

public class ReflectUtil {

    private static final Logger log = Logger.getLogger(ReflectUtil.class);

    @SuppressWarnings({ "rawtypes", "unchecked" })
 public static void setFieldValue(Object target, String fname, Class ftype,
            Object fvalue) {
        if (target == null
                || fname == null
                || "".equals(fname)
                || (fvalue != null && !ftype.isAssignableFrom(fvalue.getClass()))) {
            return;
        }
        Class clazz = target.getClass();
        try {
            Method method = clazz.getDeclaredMethod("set"
                    + Character.toUpperCase(fname.charAt(0))
                    + fname.substring(1), ftype);
            if (!Modifier.isPublic(method.getModifiers())) {
                method.setAccessible(true);
            }
            method.invoke(target, fvalue);

        } catch (Exception me) {
            if (log.isDebugEnabled()) {
               // log.debug("me异常-------->:"+me);
            }
            try {
                Field field = clazz.getDeclaredField(fname);
                if (!Modifier.isPublic(field.getModifiers())) {
                    field.setAccessible(true);
                }
                field.set(target, fvalue);
            } catch (Exception fe) {
                if (log.isDebugEnabled()) {
                    log.debug("fe----------->"+fe);
                }
            }
        }
    }
}