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package com.ruoyi.common.utils.bean;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import com.ruoyi.project.system.dept.domain.Dept;
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import com.ruoyi.project.system.user.domain.User;
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/**
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* Bean 工具类
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*
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* @author ruoyi
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*/
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public class BeanUtils
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{
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/** Bean方法名中属性名开始的下标 */
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private static final int BEAN_METHOD_PROP_INDEX = 3;
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/** * 匹配getter方法的正则表达式 */
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private static final Pattern GET_PATTERN = Pattern.compile("get(\\p{javaUpperCase}\\w*)");
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/** * 匹配setter方法的正则表达式 */
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private static final Pattern SET_PATTERN = Pattern.compile("set(\\p{javaUpperCase}\\w*)");
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/**
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* Bean属性复制工具方法。
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*
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* @param dest 目标对象
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* @param src 源对象
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*/
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public static void copyBeanProp(Object dest, Object src)
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{
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List<Method> destSetters = getSetterMethods(dest);
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List<Method> srcGetters = getGetterMethods(src);
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try
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{
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for (Method setter : destSetters)
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{
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for (Method getter : srcGetters)
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{
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if (isMethodPropEquals(setter.getName(), getter.getName())
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&& setter.getParameterTypes()[0].equals(getter.getReturnType()))
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{
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setter.invoke(dest, getter.invoke(src));
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}
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}
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}
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}
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catch (Exception e)
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{
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e.printStackTrace();
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}
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}
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/**
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* 获取对象的setter方法。
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*
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* @param obj 对象
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* @return 对象的setter方法列表
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*/
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public static List<Method> getSetterMethods(Object obj)
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{
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// setter方法列表
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List<Method> setterMethods = new ArrayList<Method>();
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// 获取所有方法
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Method[] methods = obj.getClass().getMethods();
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// 查找setter方法
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for (Method method : methods)
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{
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Matcher m = SET_PATTERN.matcher(method.getName());
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if (m.matches() && (method.getParameterTypes().length == 1))
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{
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setterMethods.add(method);
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}
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}
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// 返回setter方法列表
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return setterMethods;
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}
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/**
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* 获取对象的getter方法。
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*
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* @param obj 对象
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* @return 对象的getter方法列表
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*/
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public static List<Method> getGetterMethods(Object obj)
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{
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// getter方法列表
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List<Method> getterMethods = new ArrayList<Method>();
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// 获取所有方法
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Method[] methods = obj.getClass().getMethods();
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// 查找getter方法
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for (Method method : methods)
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{
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Matcher m = GET_PATTERN.matcher(method.getName());
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if (m.matches() && (method.getParameterTypes().length == 0))
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{
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getterMethods.add(method);
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}
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}
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// 返回getter方法列表
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return getterMethods;
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}
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/**
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* 检查Bean方法名中的属性名是否相等。<br>
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* 如getName()和setName()属性名一样,getName()和setAge()属性名不一样。
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*
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* @param m1 方法名1
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* @param m2 方法名2
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* @return 属性名一样返回true,否则返回false
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*/
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public static boolean isMethodPropEquals(String m1, String m2)
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{
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return m1.substring(BEAN_METHOD_PROP_INDEX).equals(m2.substring(BEAN_METHOD_PROP_INDEX));
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}
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public static void main(String[] args)
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{
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User user = new User();
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User zhen = new User();
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zhen.setUserName("测试名称");
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Dept dept = new Dept();
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dept.setDeptId(11L);
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dept.setDeptName("测试部门");
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zhen.setDept(dept);
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BeanUtils.copyBeanProp(user, zhen);
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System.out.println(user.getDept().getDeptName());
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}
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}
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