filedelservlet.java

一个jsp的oa系统,里面有很多亮点学习!

package com.oa.lp.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;

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

import com.oa.lp.dao.FileDAO;
import com.oa.lp.dao.FolderDAO;
import com.oa.lp.database.DataBase;
import com.oa.lp.model.Employee;
import com.oa.lp.model.Folder;

public class FileDelServlet extends TopServlet {

	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {

		// 接参
		String method = request.getParameter("method") == null?"":request.getParameter("method");
		String folderIdStr = request.getParameter("folderId");
		String fileIdStr = request.getParameter("fileId");

		int folderId=0;
		int fileId=0;
		if(folderIdStr!=null&&folderIdStr.length()>0){
			folderId = Integer.parseInt(folderIdStr);
		}
		if(fileIdStr!=null&&fileIdStr.length()>0){
			fileId = Integer.parseInt(fileIdStr);
		}
		
		Connection conn = null;
		try {
			conn = DataBase.getConnection();
			FileDAO fileDao = new FileDAO();
			fileDao.setConn(conn);
			fileDao.delFile(fileId);
			this.sendRedirect(request, response,"/FolderServlet?method=list&folderId="+folderId);
		
			// 事务提交
			DataBase.commit();

		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (conn != null) {
				// 关闭连接
				DataBase.releaseConnection(conn);
			}
		}

	}

}