java【反射】： hibernate 更新EntityBean时 两个类 之间的赋值

package cn.xyurp.junit.bean; public class User { private int id; private String username; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } }

package cn.xyurp.junit.test; import java.lang.reflect.Method; import org.junit.Test; import cn.xyurp.junit.bean.User; public class AutoSetDemo { /** * 通过一个对象自动setter * * @throws Exception */ @Test public void testUser() throws Exception { User o = new User(); o.setId(1); o.setUsername("o"); User oo = new User(); oo.setId(11); oo.setUsername("oo"); oo = (User) autoGetterAndSetter(o, oo); System.out.println("xxxx " + oo.getId()); System.out.println("xxxx " + oo.getUsername()); } public Object autoGetterAndSetter(Object src, Object target) throws Exception { Method[] sms = src.getClass().getMethods(); // 原始类方法 srcMethod Method[] tms = target.getClass().getMethods(); // 目标类防范 targetMethod for (Method sm : sms) { if (sm.getName().startsWith("get")) { // 原始类的 getter String attrName = sm.getName().substring(3);// 属性 for (Method tm : tms) {// 遍历目标类 if (("set" + attrName).equals(tm.getName())) {// 执行目标类的指定attrName的setter tm.invoke(target, sm.invoke(src)); } } } } return target; } }