jfinal將頁面提交數組目標轉換成List - 代碼共享

[文件] ModelUtils.java ~ 2KB    下載(0) package com.jfinal.core;

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

 http://www.haofapiao.com/linked/20130302.do; import javax.servlet.http.HttpServletRequest;

import com.jfinal.plugin.activerecord.Model;

/**
 * Model Tools
 * 
 * @author wangkai
 * @date Feb 14, 2013 1:43:37 PM
 * 
 */
public class ModelUtils {

    /**
     * 將頁面中的數組目標轉換成List
     * 
     * @param 
     * @param request
     * @param modelClass
     * @param prefix
     * @return
     * 
     * @author wangkai
     * @date Feb 14, 2013
     * 
     */
    @SuppressWarnings("unchecked")
    public static  List batchInjectModel(
	    final HttpServletRequest request,
	    Class modelClass, String prefix) {
	List modelList = new ArrayList();
	int size = getArrayLength(request, prefix);
	for (int i = 0; i < size; i  ) {
	    modelList.add((T) ModelInjector.inject(modelClass, prefix   "["   i
		      "]", request, false));
	}
	return modelList;
    }

    /**
     * Get array key beans[0].ID -->beans[0] beans[1].ID -->beans[1]
     * 
     * @param request
     * @param prefix
     * @return
     * 
     * @author wangkai
     * @date Feb 14, 2013
     * 
     */
    @SuppressWarnings("unchecked")
    public static Set getArrayKeys(final HttpServletRequest request,
	    String prefix) {
	Set keys = new HashSet();
	String arrayPrefix = prefix   "[";
	String key = null;
	Enumeration names = request.getParameterNames();
	while (names.hasMoreElements()) {
	    key = names.nextElement();
	    if (!key.startsWith(arrayPrefix)) {
		continue;
	    }
	    if (key.indexOf("]") == -1) {
		continue;
	    }
	    keys.add(key.substring(0, key.indexOf("]")   1));// Get all bean[X]
	}
	return keys;
    }

    /**
     * Get array length
     * 
     * @param request
     * @param prefix
     * @return
     * 
     * @author wangkai
     * @date Feb 14, 2013
     * 
     */
    public static int getArrayLength(final HttpServletRequest request,
	    String prefix) {
	return getArrayKeys(request, prefix).size();
    }
} http://rz.aaafaipiao.com/linked/20130302.do;