diff --git "a/16 \351\230\231\350\213\217\346\226\207/20230526\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232.md" "b/16 \351\230\231\350\213\217\346\226\207/20230526\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232.md"
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@@ -0,0 +1,178 @@
+~~~java
+## 查看
+
+```java
+
+package serviet;
+
+ 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.io.PrintWriter;
+ import java.sql.ResultSet;
+ import java.sql.SQLException;
+
+@WebServlet("/sel")
+public class SelectServiet extends HttpServlet {
+ @Override
+ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+ //响应的设置
+ response.setContentType("text/http;charset=utf-8");
+ //请求的设置
+ request.setCharacterEncoding("utf-8");
+ String studentname = request.getParameter("name");
+ String sql ="select * from student where name like ? ";
+
+ ResultSet rs = Tool.query(sql,"%"+studentname+"%");
+ //输出
+ PrintWriter out = response.getWriter();
+ //判断
+ try {
+ if (!rs.isBeforeFirst()) {//判断输入的姓名是否为空，若为空，则提示错误
+ out.write("没有你想要查看的信息，请检查是否输入错误！");
+ }else {
+ while (rs.next()){
+ int id = rs.getInt("id");//直接写id更加准确，当然也可以写成rs.getInt(1)
+ String name = rs.getString("name");
+ String sex = rs.getString("sex");
+ out.write("编号是："+id+"姓名是："+name+"性别是："+sex+"
");
+ }
+ }
+ } catch (SQLException e) {
+ System.out.println("执行查询异常");
+ @Override
+ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+ doGet(request,response);
+ }
+}
+```
+
+### http
+
+```java
+
+
+
+
+ Title
+
+
+请根据姓名查看信息
+
+
+
+```
+
+## 删除
+
+```java
+package serviet;
+
+ import javax.servlet.*;
+ import javax.servlet.http.*;
+ import javax.servlet.annotation.*;
+ import java.io.IOException;
+
+@WebServlet( "/delete")
+public class DeleteServlet extends HttpServlet {
+ @Override
+ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+ response.setContentType("text/html;charset=utf-8");
+ String id = request.getParameter("id");
+ String sql ="delete from student where id = ?";
+ int i = Tool.update(sql,id);
+ if (i >0) {
+ response.getWriter().write("成功");
+ }else{
+ response.getWriter().write("失败");
+ }
+ }
+
+ @Override
+ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+ doGet(request,response);
+ }
+}
+```
+
+### http
+
+```java
+
+
+
+
+ Title
+
+
+ 删除学生
+
+
+
+```
+
+## 增加
+
+```java
+package serviet;
+
+import javax.servlet.*;
+import javax.servlet.http.*;
+import javax.servlet.annotation.*;
+import java.io.IOException;
+
+@WebServlet("/addServlet")
+public class Add extends HttpServlet {
+ @Override
+ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+ response.setContentType("text/html;charset=utf-8");
+ String id = request.getParameter("id");
+ String name = request.getParameter("name");
+ String sex = request.getParameter("sex");
+ String sql ="insert into student values (?,?,?)";
+ int i = Tool.update(sql,id,name,sex);
+ if (i >0) {
+ response.getWriter().write("成功");
+ }else{
+ response.getWriter().write("失败");
+ }
+ }
+
+ @Override
+ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+ doGet(request,response);
+ }
+}
+
+```
+
+### http
+
+```java
+
+
+
+
+ Title
+
+
+ 修改学生信息
+
+
+
+```
+~~~
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