wordservlet.java

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package com.yxq.servlet;

import java.io.IOException;
import java.util.Date;
import java.util.List;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.yxq.dao.WordDao;
import com.yxq.toolsbean.MyTools;
import com.yxq.valuebean.WordBean;

public class WordServlet extends HttpServlet
{
	private static final long serialVersionUID = 1L;

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{
		this.doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{
		String action = request.getParameter("action");
		if (action == null)
			action = "";
		if (action.equals("add"))
			this.validateWord(request, response); // 添加留言
		if (action.equals("select"))
			this.selectWord(request, response); // 前台查看留言
		if (action.equals("adminselect"))
			this.adminSelect(request, response);
		if (action.equals("delete"))
			this.delete(request, response);

	}

	public void validateWord(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException
	{
		boolean mark = true;
		String messages = "";

		String author = request.getParameter("wordAuthor");
		String title = request.getParameter("wordTitle");
		String content = request.getParameter("wordContent");
		if (author == null || author.equals(""))
			author = "匿名好友";
		if (title == null || title.equals(""))
		{
			mark = false;
			messages += "<li>请输入 <b>留言标题！</b></li>";
		}
		if (content == null || content.equals(""))
		{
			mark = false;
			messages += "<li>请输入 <b>留言内容！</b></li>";
		}
		if (!mark)
		{
			request.setAttribute("messages", messages);
			RequestDispatcher rd = request
					.getRequestDispatcher("/front/word/error.jsp");
			rd.forward(request, response);
		} else
		{
			addWord(request, response);

		}
	}

	public void addWord(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{
		WordBean wordSingle = new WordBean();

		String author = MyTools.toChinese(request.getParameter("wordAuthor"));
		String title = MyTools.toChinese(request.getParameter("wordTitle"));
		String content = MyTools.toChinese(request.getParameter("wordContent"));
		String sdTime = MyTools.changeTime(new Date());
		if (author == null || author.equals(""))
			author = "匿名好友";

		wordSingle.setWordAuthor(author);
		wordSingle.setWordTitle(title);
		wordSingle.setWordContent(content);
		wordSingle.setWordTime(sdTime);

		WordDao wordDao = new WordDao();
		String messages = "";
		String forward = "";
		boolean mark = wordDao.operationWord("add", wordSingle);
		if (mark)
		{
			forward = "/front/word/success.jsp";
			messages = "<li>留言成功！</li>";

		} else
		{
			forward = "/front/word/error.jsp";
			messages = "<li>留言失败！</li>";
		}
		request.setAttribute("messages", messages);
		RequestDispatcher rd = request.getRequestDispatcher(forward);
		rd.forward(request, response);
	}

	public void selectWord(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException
	{
		WordDao wordDao = new WordDao();
		List<?> wordList = wordDao.queryWord("all");
		request.setAttribute("wordList", wordList);

		RequestDispatcher rd = request
				.getRequestDispatcher("/front/word/WordShow.jsp");
		rd.forward(request, response);
	}

	public void adminSelect(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException
	{
		WordDao wordDao = new WordDao();
		List<?> wordList = wordDao.queryWord("all");
		request.setAttribute("adminwordList", wordList);

		RequestDispatcher rd = request
				.getRequestDispatcher("/admin/word/WordList.jsp");
		rd.forward(request, response);
	}

	public void delete(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException
	{
		WordDao wordDao = new WordDao();
		WordBean wordBean = new WordBean();

		String messages = "";
		String href = "";
		String forward = "";
		wordBean.setId(MyTools.strToint(request.getParameter("id")));
		boolean mark = wordDao.operationWord("delete", wordBean);
		if (mark)
		{
			messages += "<li>删除留言成功！</li>";
			href = "<a href='WordServlet?action=adminselect'>[继续删除其他留言]</a>";
			forward = "/admin/success.jsp";

		} else
		{
			messages += "<li>删除留言失败！</li>";
			href = "<a href='javascript:window.history.go(-1)'>[返回]</a>";
			forward = "/admin/error.jsp";
		}
		request.setAttribute("messages", messages);
		request.setAttribute("href", href);
		RequestDispatcher rd = request.getRequestDispatcher(forward);
		rd.forward(request, response);
	}
}