firstleveltitleservlet.java

新闻发布系统 jsp制作。可应用与毕业设计

package com.newsIssueSystem.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

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.newsIssueSystem.javaBean.*;

public class FirstLevelTitleServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public FirstLevelTitleServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");

		// 申明变量 得到 请求过来的 值
		String fTitleName = request.getParameter("txtFirstTitleName");
		String createTime = request.getParameter("txtCreateTime");
		String creater = request.getParameter("txtCreater");

		// 创造 一个javaBean对象
		FirstLevelTitle flt = new FirstLevelTitle();

		
		// 声明变量```为查询数据库中是否存在 同样的 一级新闻名 做准备
		ArrayList lst = null;
		lst = flt.getAllFirstLevelTitle();
		FirstLevelTitle test = null;
		String testName = null;
		for (int i = 0; i < lst.size(); i++) {
			test = (FirstLevelTitle) lst.get(i);
			if (test.getFirstTitleName().equals(fTitleName)) {
				testName = test.getFirstTitleName();
			}
		}
		//插入操作
		if (testName == null) {
			
			flt.setFirstTitleName(fTitleName);
			flt.setCreateTime(createTime);
			flt.setCreater(creater);
			
			System.out.print("一级新闻插入状态");
			boolean isSuccess = flt.insertFirstLevelTitle(flt);
			System.out.println(isSuccess);
			if (isSuccess) {
				request.setAttribute("isSuccess", isSuccess);
				request.setAttribute("fTitleName", fTitleName);
				request.setAttribute("createTime", createTime);
				request.setAttribute("creater", creater);

				RequestDispatcher rd = request
						.getRequestDispatcher("result.jsp");
				rd.forward(request, response);
			} else {
				request.setAttribute("isSuccess", isSuccess);
			}
		} else {//更新操作
			flt.setFirstTitleName(fTitleName);
			flt.setCreateTime(createTime);
			flt.setCreater(creater);
			
			boolean isUpdateSucess=flt.updateFirstLevelTitle(flt);
			
			request.setAttribute("isUpdateSucess", isUpdateSucess);
			request.setAttribute("fTitleName", fTitleName);
			request.setAttribute("createTime", createTime);
			request.setAttribute("creater", creater);

			RequestDispatcher rd = request
					.getRequestDispatcher("result.jsp");
			rd.forward(request, response);
		}

		//
	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}