From 1c8354c3dadaf6f8c5b5347654882976eb11ab79 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E8=83=A1=E6=99=BA=E7=A0=94?= <3058944672@qq.com> Date: Sat, 3 Jun 2023 10:42:52 +0800 Subject: [PATCH] =?UTF-8?q?=E4=BD=9C=E4=B8=9A?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ...46\254\241\344\275\234\344\270\232.md.txt" | 256 ++++++++++++++++++ 1 file changed, 256 insertions(+) create mode 100644 "46 \350\203\241\346\231\272\347\240\224/20230603\347\254\254\345\205\255\346\254\241\344\275\234\344\270\232.md.txt" diff --git "a/46 \350\203\241\346\231\272\347\240\224/20230603\347\254\254\345\205\255\346\254\241\344\275\234\344\270\232.md.txt" "b/46 \350\203\241\346\231\272\347\240\224/20230603\347\254\254\345\205\255\346\254\241\344\275\234\344\270\232.md.txt" new file mode 100644 index 0000000..6440e3e --- /dev/null +++ "b/46 \350\203\241\346\231\272\347\240\224/20230603\347\254\254\345\205\255\346\254\241\344\275\234\344\270\232.md.txt" @@ -0,0 +1,256 @@ +<%@ page import="Tool.DbJbdc" %> +<%@ page import="java.sql.ResultSet" %> +<%@ page contentType="text/html;charset=UTF-8" language="java" %> + + + 学生信息 + + + + + + <% + String sql="select * from student"; + ResultSet rs = DbJbdc.Query(sql); + while (rs.next()){ + int id = rs.getInt("id"); + String name = rs.getString("name"); + String sex = rs.getString("sex"); + + %> + + + + + + + + + <% + } + %> + + +
编号姓名性别操作
<%=id%><%=name%><%=sex%>修改 删除
+ + + +``` + +```java +package servlet; + +public class student { + private int id; + private String name; + private String sex; + + public student() { + } + + public student(int id, String name, String sex) { + this.id = id; + this.name = name; + this.sex = sex; + } + + public int getId() { + return id; + } + + public void setId(int id) { + this.id = id; + } + + public String getName() { + return name; + } + + public void setName(String name) { + this.name = name; + } + + public String getSex() { + return sex; + } + + public void setSex(String sex) { + this.sex = sex; + } +} + +``` + +```java +package servlet; + +import Tool.DbJbdc; +import jakarta.servlet.ServletException; +import jakarta.servlet.annotation.WebServlet; +import jakarta.servlet.http.HttpServlet; +import jakarta.servlet.http.HttpServletRequest; +import jakarta.servlet.http.HttpServletResponse; + +import java.io.IOException; +import java.sql.ResultSet; +import java.sql.SQLException; + + +@WebServlet(name = "updateById", value = "/updateById") +public class updateById extends HttpServlet { + @Override + protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { + response.setContentType("text/html;charset=utf-8"); + request.setCharacterEncoding("utf-8"); + + String id = request.getParameter("id"); + String sql ="select * from student where id=?"; + try { + ResultSet rs = DbJbdc.Query(sql, id); + rs.next(); + int id1 = rs.getInt("id"); + String name = rs.getString("name"); + String sex = rs.getString("sex"); + student stu = new student(id1, name, sex); + request.setAttribute("student",stu); + request.getRequestDispatcher("/edit.jsp").forward(request,response); + } catch (SQLException e) { + throw new RuntimeException(e); + } catch (ClassNotFoundException e) { + throw new RuntimeException(e); + } + } + + @Override + protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { + + } +} + +``` + +```java +package servlet; + +import Tool.DbJbdc; +import jakarta.servlet.ServletException; +import jakarta.servlet.annotation.WebServlet; +import jakarta.servlet.http.HttpServlet; +import jakarta.servlet.http.HttpServletRequest; +import jakarta.servlet.http.HttpServletResponse; + +import java.io.IOException; +import java.sql.SQLException; + + +@WebServlet(name = "deleteById", value = "/deleteById") +public class deleteById extends HttpServlet { + @Override + protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { + response.setContentType("text/html;charset=utf-8"); + request.setCharacterEncoding("utf-8"); + String id = request.getParameter("id"); + String sql="delete from student where id=?"; + try { + int i = DbJbdc.Update(sql, id); + if (i>0){ + response.getWriter().write(""); +// response.sendRedirect("/index.jsp"); + }else { + response.getWriter().write("删除失败"); + } + } catch (SQLException | ClassNotFoundException e) { + throw new RuntimeException(e); + } + } + + @Override + protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { + + } +} + +``` + +```java +package servlet; + +import Tool.DbJbdc; +import jakarta.servlet.ServletException; +import jakarta.servlet.annotation.WebServlet; +import jakarta.servlet.http.HttpServlet; +import jakarta.servlet.http.HttpServletRequest; +import jakarta.servlet.http.HttpServletResponse; + +import java.io.IOException; +import java.sql.SQLException; + + +@WebServlet(name = "saveUpdate", value = "/saveUpdate") +public class saveUpdate extends HttpServlet { + @Override + protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { + + } + + @Override + protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { + response.setContentType("text/html;charset=utf-8"); + request.setCharacterEncoding("utf-8"); + + String id = request.getParameter("id"); + String name = request.getParameter("name"); + String sex = request.getParameter("sex"); + + String sql ="update student set name=? , sex=? where id=?"; + try { + int i = DbJbdc.Update(sql, name, sex,id); + if (i>0){ + response.getWriter().write(""); + // response.sendRedirect("/index.jsp"); + }else { + response.getWriter().write("修改失败"); + } + } catch (SQLException e) { + throw new RuntimeException(e); + } catch (ClassNotFoundException e) { + throw new RuntimeException(e); + } + } +} + +``` + + + +```jsp +<%@ page import="servlet.student" %><%-- + Created by IntelliJ IDEA. + User: Administrator + Date: 2023-05-27 + Time: 16:55 + To change this template use File | Settings | File Templates. +--%> +<%@ page contentType="text/html;charset=UTF-8" language="java" %> + + + 修改学生 + + +<% + student stu = (student) request.getAttribute("student"); +%> +
+ 姓名
+ 性别
+ + +
+ + + +``` \ No newline at end of file -- Gitee