diff --git "a/34 \345\210\230\346\231\272\347\277\224/js\345\242\236\345\210\240\346\224\271\346\237\245.md" "b/34 \345\210\230\346\231\272\347\277\224/js\345\242\236\345\210\240\346\224\271\346\237\245.md"
new file mode 100644
index 0000000000000000000000000000000000000000..2fa1f0dcce837b7ba286391308e1335bc78b5979
--- /dev/null
+++ "b/34 \345\210\230\346\231\272\347\277\224/js\345\242\236\345\210\240\346\224\271\346\237\245.md"
@@ -0,0 +1,157 @@
+```java
+// 增
+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;
+@WebServlet("/insert")
+public class Inser extends HttpServlet {
+ @Override
+ protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+ req.setCharacterEncoding("utf-8");
+ resp.setContentType("text/html;charset=utf-8");
+ String sql = "insert into biao values (?,?,?)";
+ String id = req.getParameter("id");
+ String name = req.getParameter("name");
+ String sex = req.getParameter("sex");
+ int i = Student.Upd(sql, id, name, sex);
+ if (i>0){
+ resp.getWriter().write("添加成功");
+ }else {
+ resp.getWriter().write("添加失败");
+ }
+ }
+
+ @Override
+ protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+ doGet(req,resp);
+ }
+}
+```
+
+```java
+
+
+
+
+ Title
+
+
+添加学生
+
+
+
+```
+
+```java
+// 删
+import javax.servlet.*;
+import javax.servlet.http.*;
+import javax.servlet.annotation.*;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+@WebServlet("/del")
+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 biao where id = ?";
+ int i = Student.Upd(sql, id);
+ PrintWriter out = response.getWriter();
+ if (i>0){
+ out.write("完美");
+ }else {
+ out.write("完蛋");
+ }
+ }
+
+ @Override
+ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+ doGet(request,response);
+ }
+}
+
+```
+
+```java
+
+
+
+ Title
+
+
+删除学生
+
+
+
+```
+
+```java
+// 查
+import javax.servlet.*;
+import javax.servlet.http.*;
+import javax.servlet.annotation.*;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+@WebServlet("/sel")
+public class SelectServlet 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 name = request.getParameter("name");
+ String sql = "select * from biao where id = ? or name like ? ";
+ PrintWriter out = response.getWriter();
+ ResultSet re = Student.Sele(sql,name,"%"+name+"%");
+ try {
+ while (re.next()){
+ int id = re.getInt(1);
+ String names = re.getString(2);
+ String sex = re.getString(3);
+ out.write(id+names+sex);
+ }
+ } catch (SQLException throwables) {
+ throwables.printStackTrace();
+ }
+
+ }
+
+ @Override
+ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+ doGet(request,response);
+ }
+}
+```
+
+```java
+
+
+
+
+ Title
+
+
+查询
+
+
+
+```
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