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首頁 hot資訊 JavaWeb管理系統源碼

JavaWeb管理系統源碼

更新時間：2022-06-01 09:37:33 來源：動力節點 瀏覽1663次

數據庫：MySQL

服務器：tomcat

前端js框架：bootstrap

相關技術：JavaScript、servlet、jsp、mvc

功能

1. 列表查詢

2. 登錄

3. 添加

4. 刪除

5. 修改

6. . 刪除選中

7. 分頁查詢

8. 復雜條件查詢

9.登錄(加入驗證嗎功能)

實現結果

登錄實現

loginServlet

package z.user.web.servlet;
import z.user.domain.User;
import z.user.service.UserService;
import z.user.service.impl.UserServiceImpl;
import org.apache.commons.beanutils.BeanUtils;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.設置編碼
        request.setCharacterEncoding("utf-8");
        //2.獲取數據
        //2.1獲取用戶填寫驗證碼
        String verifycode = request.getParameter("verifycode");
        //3.驗證碼校驗
        HttpSession session = request.getSession();
        String checkcode_server = (String) session.getAttribute("CHECKCODE_SERVER");
        session.removeAttribute("CHECKCODE_SERVER");//確保驗證碼一次性
        if(!checkcode_server.equalsIgnoreCase(verifycode)){
            //驗證碼不正確
            //提示信息
            request.setAttribute("login_msg","驗證碼錯誤！");
            //跳轉登錄頁面
            request.getRequestDispatcher("/login.jsp").forward(request,response);
            return;
        }
        Map<String, String[]> map = request.getParameterMap();
        //4.封裝User對象
        User user = new User();
        try {
            BeanUtils.populate(user,map);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
        //5.調用Service查詢
        UserService service = new UserServiceImpl();
        User loginUser = service.login(user);
        //6.判斷是否登錄成功
        if(loginUser != null){
            //登錄成功
            //將用戶存入session
            session.setAttribute("user",loginUser);
            //跳轉頁面
            response.sendRedirect(request.getContextPath()+"/index.jsp");
        }else{
            //登錄失敗
            //提示信息
            request.setAttribute("login_msg","用戶名或密碼錯誤！");
            //跳轉登錄頁面
            request.getRequestDispatcher("/login.jsp").forward(request,response);
        }
    }
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

checkcodeServlet(驗證碼)

package z.user.web.servlet;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;
/**
 * 驗證碼
 */
@WebServlet("/checkCodeServlet")
public class CheckCodeServlet extends HttpServlet {
	public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {		
		//服務器通知瀏覽器不要緩存
		response.setHeader("pragma","no-cache");
		response.setHeader("cache-control","no-cache");
		response.setHeader("expires","0");		
		//在內存中創建一個長80，寬30的圖片，默認黑色背景
		//參數一：長
		//參數二：寬
		//參數三：顏色
		int width = 80;
		int height = 30;
		BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);		
		//獲取畫筆
		Graphics g = image.getGraphics();
		//設置畫筆顏色為灰色
		g.setColor(Color.GRAY);
		//填充圖片
		g.fillRect(0,0, width,height);		
		//產生4個隨機驗證碼，12Ey
		String checkCode = getCheckCode();
		//將驗證碼放入HttpSession中
		request.getSession().setAttribute("CHECKCODE_SERVER",checkCode);		
		//設置畫筆顏色為黃色
		g.setColor(Color.YELLOW);
		//設置字體的小大
		g.setFont(new Font("黑體",Font.BOLD,24));
		//向圖片上寫入驗證碼
		g.drawString(checkCode,15,25);		
		//將內存中的圖片輸出到瀏覽器
		//參數一：圖片對象
		//參數二：圖片的格式，如PNG,JPG,GIF
		//參數三：圖片輸出到哪里去
		ImageIO.write(image,"PNG",response.getOutputStream());
	}
	/**
	 * 產生4位隨機字符串 
	 */
	private String getCheckCode() {
		String base = "0123456789ABCDEFGabcdefg";
		int size = base.length();
		Random r = new Random();
		StringBuffer sb = new StringBuffer();
		for(int i=1;i<=4;i++){
			//產生0到size-1的隨機值
			int index = r.nextInt(size);
			//在base字符串中獲取下標為index的字符
			char c = base.charAt(index);
			//將c放入到StringBuffer中去
			sb.append(c);
		}
		return sb.toString();
	}
	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		this.doGet(request,response);
	}
}

FindUserByPageServlet(查詢分頁)------------------------

package z.user.web.servlet;
import z.user.domain.PageBean;
import z.user.domain.User;
import z.user.service.UserService;
import z.user.service.impl.UserServiceImpl;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Map;
@WebServlet("/findUserByPageServlet")
public class FindUserByPageServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        //1.獲取參數
        String currentPage = request.getParameter("currentPage");//當前頁碼
        String rows = request.getParameter("rows");//每頁顯示條數
        if(currentPage == null || "".equals(currentPage)){
            currentPage = "1";
        }
        if(rows == null || "".equals(rows)){
            rows = "5";
        }        
        //獲取條件查詢參數
        Map<String, String[]> condition = request.getParameterMap();
        //2.調用service查詢
        UserService service = new UserServiceImpl();
        PageBean<User> pb = service.findUserByPage(currentPage,rows,condition);
        System.out.println(pb);
        //3.將PageBean存入request
        request.setAttribute("pb",pb);
        request.setAttribute("condition",condition);//將查詢條件存入request
        //4.轉發到list.jsp
        request.getRequestDispatcher("/list.jsp").forward(request,response);
    }
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

AddUserServlet(添加)--------------------------------------------------

package z.user.web.servlet;
import z.user.domain.User;
import z.user.service.UserService;
import z.user.service.impl.UserServiceImpl;
import org.apache.commons.beanutils.BeanUtils;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
@WebServlet("/addUserServlet")
public class AddUserServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.設置編碼
        request.setCharacterEncoding("utf-8");
        //2.獲取參數
        Map<String, String[]> map = request.getParameterMap();
        //3.封裝對象
        User user = new User();
        try {
            BeanUtils.populate(user,map);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
        //4.調用Service保存
        UserService service = new UserServiceImpl();
        service.addUser(user);
        //5.跳轉到userListServlet
        response.sendRedirect(request.getContextPath()+"/userListServlet");
    }
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

 

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