stringseparator.java

《j2ee开发全程实录》随书源码

package com.cownew.ctk.common.stringSep;

import java.util.ArrayList;
import java.util.List;

/**
 * 字符串拼接解析类
 * 
 * @author yangzk
 * 
 */
public class StringSeparator
{
	/**
	 * 将List中的每一项调用toString方法得到的字符串拼接成一个字符串
	 * 
	 * @param strList 
	 * @return
	 */
	public static String pack(List strList)
	{
		StringBuffer sb = new StringBuffer();
		for (int i = 0, n = strList.size(); i < n; i++)
		{
			String s = strList.get(i).toString();
			s = s.replaceAll(">", ">>");
			s = s.replaceAll(";", ">;");
			sb.append(s).append(";");
		}
		return sb.toString();
	}
	
	/**
	 * 将strArray拼接成一个字符串
	 * @see public static String pack(List strList)
	 * @param strArray
	 * @return
	 */
	public static String pack(String[] strArray)
	{
		StringBuffer sb = new StringBuffer();
		for (int i = 0, n = strArray.length; i < n; i++)
		{
			String s = strArray[i];
			s = s.replaceAll(">", ">>");
			s = s.replaceAll(";", ">;");
			sb.append(s).append(";");
		}
		return sb.toString();
	}

	/**
	 * 将由pack方法返回的字符串重新解析成字符串，然后以String类型保存到List中返回
	 * 
	 * @param value
	 * @return
	 * @throws ParserException
	 */
	public static List unPack(String value) throws ParserException
	{
		List list = new ArrayList();
		Lexer lexer = new Lexer(value);
		for (Token t = lexer.next(); t != null; t = lexer.next())
		{
			if (t instanceof WordToken)
			{
				list.add(((WordToken) t).getValue());
			}
		}
		return list;
	}	
	
	/**
	 * 将由pack方法返回的字符串重新解析成字符串，然后以String类型保存到数组中返回
	 * @param value
	 * @return
	 * @throws ParserException
	 */
	public static String[] unPackAsArray(String value) throws ParserException
	{
		List list = unPack(value);
		String[] ret = new String[list.size()];
		for(int i=0,n=list.size();i<n;i++)
		{
			ret[i] = (String) list.get(i);
		}
		return ret;
	}
	
	public static void main(String[] args)
	{
		try
		{
			String s1 = "n>;a>;;";
			System.out.println(StringSeparator.unPack(s1));
		} catch (Exception e)
		{
			e.printStackTrace();
		}
		if(true)return;
		List inList = new ArrayList();
		inList.add("ab哈哈d>3>;3");
		inList.add("\ndde>;3");
		inList.add("aa");
		inList.add("c33>d;>>\n22d");

		String t = pack(inList);
		System.out.println("合并保存后的值：" + t);

		System.out.println("解析结果");
		try
		{
			List outList = unPack(t);
			for (int i = 0, n = outList.size(); i < n; i++)
			{
				System.out.println(outList.get(i));
			}
		} catch (ParserException e)
		{
			e.printStackTrace();
		}
	}
}