PageRequestFactory.java

package com.company.project.common.util;


import java.lang.reflect.InvocationTargetException;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.beanutils.BeanUtilsBean;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.util.WebUtils;

import cn.org.rapid_framework.page.PageRequest;
import cn.org.rapid_framework.util.page.PageQuery;

/**
 * 用于分页组件覆盖的类,新的分页组件覆盖此类的bindPageRequest()方法以适合不同的分页创建
 * @author badqiu
 */
public class PageRequestFactory {
    public static final int MAX_PAGE_SIZE = 1000;
    
    static BeanUtilsBean beanUtils = new BeanUtilsBean();
    static {
        //注册全局的converters
        ConvertRegisterHelper.registerConverters();
        
    	//注册专用的BeanUtils用于注册日期类型的转换
    	String[] datePatterns = new String[] {"yyyy-MM-dd","yyyy-MM-dd HH:mm:ss","yyyy-MM-dd HH:mm:ss.SSS","HH:mm:ss"};
    	ConvertRegisterHelper.registerConverters(beanUtils.getConvertUtils(),datePatterns);
    	
        System.out.println("PageRequestFactory.MAX_PAGE_SIZE="+MAX_PAGE_SIZE);
    }

    /**
     * 从request中绑定参数至PageRequest 
     * @return
     */
    public static <T extends PageRequest> T bindPageRequest(T pageRequest,HttpServletRequest request){
        return bindPageRequest(pageRequest, request, null);
    }
    /**
     * 从request中绑定参数至PageRequest 
     * @return
     */    
    public static <T extends PageRequest> T bindPageRequest(T pageRequest,HttpServletRequest request,String defaultSortColumns){
        return bindPageRequest(pageRequest, request, defaultSortColumns, PageQuery.DEFAULT_PAGE_SIZE);
    }
    
    /**
     * 从request绑定PageRequest的属性值
     */
    public static <T extends PageRequest> T bindPageRequest(T pageRequest, HttpServletRequest request,String defaultSortColumns, int defaultPageSize) {
	    	try {
	    		Map sourceParams = WebUtils.getParametersStartingWith(request, "");
	    		beanUtils.copyProperties(pageRequest, sourceParams);
		    } catch (IllegalAccessException e) {
		    	throw new IllegalArgumentException("beanUtils.copyProperties() error",e);
			} catch (InvocationTargetException e) {
				throw new IllegalArgumentException("beanUtils.copyProperties() error",e.getTargetException());
			}
	        
	        pageRequest.setPageNumber(ServletRequestUtils.getIntParameter(request, "pageNumber", 1));
	        pageRequest.setPageSize(ServletRequestUtils.getIntParameter(request, "pageSize", defaultPageSize));
	        pageRequest.setSortColumns(ServletRequestUtils.getStringParameter(request, "sortColumns",defaultSortColumns));
	        
	        if(pageRequest.getPageSize() > MAX_PAGE_SIZE) {
	            pageRequest.setPageSize(MAX_PAGE_SIZE);
	        }
	        return pageRequest;
    }

}