From bf868bb4cdc9ce273fef3a024a8b553260773799 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9C=B1=E5=BF=97=E9=B9=8F?= <326806914@qq.com>
Date: Sun, 28 May 2023 13:35:49 +0000
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
Signed-off-by: 朱志鹏 <326806914@qq.com>
---
...44\345\222\214\344\277\256\346\224\271.md" | 206 ++++++++++++++++++
1 file changed, 206 insertions(+)
create mode 100644 "10 \346\234\261\345\277\227\351\271\217/\345\210\240\351\231\244\345\222\214\344\277\256\346\224\271.md"
diff --git "a/10 \346\234\261\345\277\227\351\271\217/\345\210\240\351\231\244\345\222\214\344\277\256\346\224\271.md" "b/10 \346\234\261\345\277\227\351\271\217/\345\210\240\351\231\244\345\222\214\344\277\256\346\224\271.md"
new file mode 100644
index 0000000..c5648f2
--- /dev/null
+++ "b/10 \346\234\261\345\277\227\351\271\217/\345\210\240\351\231\244\345\222\214\344\277\256\346\224\271.md"
@@ -0,0 +1,206 @@
+```java
+<%@ page import="java.sql.ResultSet" %>
+<%@ page import="Utils.JDBC" %><%--
+ //index.jsp
+ Created by IntelliJ IDEA.
+ User: Administrator
+ Date: 2023-05-27
+ Time: 15:27
+ To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+
+
+ 学生列表
+
+
+
+
+
+ | 编号 |
+ 姓名 |
+ 年龄 |
+ 操作 |
+
+ <%
+ String sql = "select *from student";
+ ResultSet select = JDBC.select(sql);
+ while (select.next()) {
+ int id = select.getInt("id");
+ String name = select.getString("name");
+ String sex = select.getString("sex");
+
+ %>
+
+ | <%=id%>
+ |
+ <%=name%>
+ |
+ <%=sex%>
+ |
+ 修改 删除 |
+
+
+ <%
+ }
+ %>
+
+
+
+```
+
+```java
+<%@ page import="use.Student" %><%--
+ Created by IntelliJ IDEA.
+ //Update.jsp
+ User: 苏晓
+ Date: 2023/5/28
+ Time: 17:56
+ To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+
+
+ 修改学生信息
+
+
+<%
+ // 从request取出传过来的学生对象
+// 强转，因为默认是Object
+%>
+
+<%
+ Student student = (Student) request.getAttribute("student");
+%>
+
+
+
+
+
+
+
+
+
+```
+
+```java
+package Utils;//工具类
+import java.sql.*;
+
+public class JDBC {
+ static {
+ try {
+ Class.forName("com.mysql.jdbc.Driver");
+ } catch (ClassNotFoundException e) {
+ throw new RuntimeException(e);
+ }
+ }
+
+ //创建连接
+ private static Connection conn() {
+ String url = "jdbc:mysql://localhost:3306/student?useUnicode=true&characterEncoding=utf8";
+ Connection conn = null;
+ try {
+ conn = DriverManager.getConnection(url, "root", "36932211");
+ } catch (SQLException e) {
+ throw new RuntimeException(e);
+ }
+ return conn;
+ }
+
+ //查询
+ public static ResultSet select(String sql, String... arr) {
+ ResultSet re = null;
+ try {
+ PreparedStatement pst = conn().prepareStatement(sql);
+ for (int i = 0; i < arr.length; i++) {
+ pst.setString((i + 1), arr[i]);
+ }
+ re = pst.executeQuery();
+ } catch (SQLException e) {
+ throw new RuntimeException(e);
+ }
+ return re;
+ }
+
+ //增删改
+ public static int update(String sql, String... arr) {
+ try {
+ PreparedStatement pst = conn().prepareStatement(sql);
+ for (int i = 0; i < arr.length; i++) {
+ pst.setString((i + 1), arr[i]);
+ }
+ int i = pst.executeUpdate();
+ return i;
+ } catch (SQLException e) {
+
+ throw new RuntimeException(e);
+ }
+ }
+}
+//封装的学生对象
+package use;
+
+public class Student {
+ private int id;
+ private String name;
+ private String sex;
+
+ @Override
+ public String toString() {
+ return "Student{" +
+ "id=" + id +
+ ", name='" + name + '\'' +
+ ", 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;
+ }
+
+ public Student() {
+ }
+
+ public Student(int id, String name, String sex) {
+ this.id = id;
+ this.name = name;
+ this.sex = sex;
+ }
+}
+```
+
+````ja
--
Gitee