java复制类的值不复制引用

工具类：

package com.eazo.sparta.project.std.function.bean;
 
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
 
public class CloneTool {
    /**
     * 利用反射实现对象之间属性复制
     * @param from
     * @param to
     */
    public static void copyProperties(Object from, Object to) throws Exception {
        copyPropertiesExclude(from, to, null);
    }
     
    /**
     * 复制对象属性
     * @param from
     * @param to
     * @param excludsArray 排除属性列表
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    public static void copyPropertiesExclude(Object from, Object to, String[] excludsArray) throws Exception {
        List excludesList = null;
        if(excludsArray != null && excludsArray.length > 0) {
            excludesList = Arrays.asList(excludsArray);   //构造列表对象
        }
        Method[] fromMethods = from.getClass().getDeclaredMethods();
        Method[] toMethods = to.getClass().getDeclaredMethods();
        Method fromMethod = null, toMethod = null;
        String fromMethodName = null, toMethodName = null;
        for (int i = 0; i < fromMethods.length; i++) {
            fromMethod = fromMethods[i];
            fromMethodName = fromMethod.getName();
            if (!fromMethodName.contains("get"))
                continue;
            //排除列表检测
            if(excludesList != null && excludesList.contains(fromMethodName.substring(3).toLowerCase())) {
                continue;
            }
            toMethodName = "set" + fromMethodName.substring(3);
            toMethod = findMethodByName(toMethods, toMethodName);
            if (toMethod == null)
                continue;
            Object value = fromMethod.invoke(from, new Object[0]);
            if(value == null)
                continue;
            //集合类判空处理
            if(value instanceof Collection) {
                Collection newValue = (Collection)value;
                if(newValue.size() <= 0)
                    continue;
            }
            toMethod.invoke(to, new Object[] {value});
        }
    }
     
    /**
     * 对象属性值复制，仅复制指定名称的属性值
     * @param from
     * @param to
     * @param includsArray
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    public static void copyPropertiesInclude(Object from, Object to, String[] includsArray) throws Exception {
        List includesList = null;
        if(includsArray != null && includsArray.length > 0) {
            includesList = Arrays.asList(includsArray);   //构造列表对象
        } else {
            return;
        }
        Method[] fromMethods = from.getClass().getDeclaredMethods();
        Method[] toMethods = to.getClass().getDeclaredMethods();
        Method fromMethod = null, toMethod = null;
        String fromMethodName = null, toMethodName = null;
        for (int i = 0; i < fromMethods.length; i++) {
            fromMethod = fromMethods[i];
            fromMethodName = fromMethod.getName();
            if (!fromMethodName.contains("get"))
                continue;
            //排除列表检测
            String str = fromMethodName.substring(3);
            if(!includesList.contains(str.substring(0,1).toLowerCase() + str.substring(1))) {
                continue;
            }
            toMethodName = "set" + fromMethodName.substring(3);
            toMethod = findMethodByName(toMethods, toMethodName);
            if (toMethod == null)
                continue;
            Object value = fromMethod.invoke(from, new Object[0]);
            if(value == null)
                continue;
            //集合类判空处理
            if(value instanceof Collection) {
                Collection newValue = (Collection)value;
                if(newValue.size() <= 0)
                    continue;
            }
            toMethod.invoke(to, new Object[] {value});
        }
    }
     
     
 
    /**
     * 从方法数组中获取指定名称的方法
     * 
     * @param methods
     * @param name
     * @return
     */
    public static Method findMethodByName(Method[] methods, String name) {
        for (int j = 0; j < methods.length; j++) {
            if (methods[j].getName().equals(name))
                return methods[j];
        }
        return null;
    }
}

使用方法：

String[] stdOrderListArray = {"olId","olSchCode","coachId","olSubjectState","olTime","olColName"};//复制类的所有属性
CloneTool.copyPropertiesInclude(from,to, stdOrderListArray);