java频繁的new对象 优化方案

import java.io.Serializable;
import java.util.Collection;
import java.util.concurrent.Callable;

import org.springframework.web.context.request.async.WebAsyncTask;

import com.github.miemiedev.mybatis.paginator.domain.PageList; /**
 * 对于将会频繁创建的对象，我们要让这个类实现Cloneable接口,通过getInstance()函数处理获取对象
 * clone的最大特点就是，不会去调用任何构造方法,提高很多频繁new对象产生的时耗
 * 
 * @作者 light-zhang
 * @时间 2018年8月16日 
 * @file WebAsyncSupport.java
 *
 */
public final class WebAsyncSupport implements Serializable, Cloneable {

    private static final long serialVersionUID = -1642396555652972191L;

    private static WebAsyncSupport support = new WebAsyncSupport();

    private WebAsyncSupport() {
        super();
    }

    /**
     * 调用对象创建优化
     * 
     * @return
     */
    public static WebAsyncSupport getInstance() {
        try {
            return (WebAsyncSupport) support.clone();
        } catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        return new WebAsyncSupport();
    }

    /**
     * 分页参数处理
     * 
     * @param items
     * @param containsTotalCount
     * @return
     */
    public WebAsyncTask<ReturnMsg> asyncPageList(Collection<?> items, boolean containsTotalCount) {
        ReturnMsg m = null;
        m = ReturnMsg.getPage("SUCCESS", HttpStatusCode.OK, items, null);
        if (containsTotalCount) {// 使用containsTotalCount来决定查不查询totalCount，即返回ArrayList还是PageList
            @SuppressWarnings("unchecked")
            final PageList<Object> pageData = (PageList<Object>) items;
            if (!validateListNull(pageData)) {
                m = ReturnMsg.getPage("SUCCESS", HttpStatusCode.OK, pageData, pageData.getPaginator());
            }
        }
        return this.getWebAsyncTask(m);
    }

    /**
     * 异步任务处理
     * 
     * @param m
     * @return
     */
    public WebAsyncTask<ReturnMsg> getWebAsyncTask(ReturnMsg m) {
        return new WebAsyncTask<ReturnMsg>(1000, new Callable<ReturnMsg>() {
            @Override
            public ReturnMsg call() throws Exception {
                return m;
            }
        });
    }

    /**
     * 验证数组参数
     * 
     * @param list
     * @return
     */
    public static boolean validateListNull(Collection<?> list) {
        return (list == null || list.isEmpty()) ? true : false;
    }
}