标签接口

src/com/hellogithub/dao/UserDao.java

@@ -2,11 +2,10 @@ package com.hellogithub.dao;
 
 import com.hellogithub.entity.userEntity;
 import com.hellogithub.utils.JdbcUtils;
+import org.apache.commons.dbutils.QueryRunner;
+import org.apache.commons.dbutils.handlers.BeanHandler;
 
-import java.sql.Connection;
+import java.sql.*;
-import java.sql.Date;
-import java.sql.PreparedStatement;
-import java.sql.ResultSet;
 
 /**
  * 用户Dao层
@@ -113,4 +112,51 @@ public class UserDao {
             JdbcUtils.closeConnection(resultSet, preparedStatement, connection);
         }
     }
+
+    public int dedletePieceLabel(int userID,String str){
+        String label;
+        int num;
+        try {
+            Connection conn = JdbcUtils.getConnection();
+            QueryRunner runner = new QueryRunner();
+            String sql = "select searchHistory from user where userId=?";
+            label  = runner.query(conn, sql, new BeanHandler<>(String.class),userID);
+            label=label.replace(str,"");
+            sql="UPDATE user SET searchHistory = ? WHERE userId= ?";
+            num = runner.update(conn,sql,label,userID);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+
+        return num;
+    }
+    public String selectLabel(int userID){
+        String label;
+        try {
+            Connection conn = JdbcUtils.getConnection();
+            QueryRunner runner = new QueryRunner();
+            String sql = "select searchHistory from user where userId=?";
+            label  = runner.query(conn, sql, new BeanHandler<>(String.class),userID);
+
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+
+        return  label;
+    }
+
+    public int  dedleteAllLabel(int userID){
+        String label="";
+        int num;
+        try {
+            Connection conn = JdbcUtils.getConnection();
+            QueryRunner runner = new QueryRunner();
+            String sql="UPDATE user SET searchHistory = ? WHERE userId= ?";
+            num = runner.update(conn,sql,label,userID);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+
+        return num;
+    }
 }

src/com/hellogithub/dao/projectDao.java

@@ -21,6 +21,7 @@ public class projectDao {
             QueryRunner runner = new QueryRunner();
             String sql = "select * from project where periodicals = ?";
             projectEntityList = runner.query(conn, sql, new BeanListHandler<>(projectEntity.class), num);
+            conn.close();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         }
@@ -34,6 +35,7 @@ public class projectDao {
             QueryRunner runner = new QueryRunner();
             String sql = "select * from project Group BY periodicals DESC limit 1";
             projectEntity = runner.query(conn, sql, new BeanHandler<>(projectEntity.class));
+            conn.close();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         }
@@ -47,6 +49,7 @@ public class projectDao {
             QueryRunner runner = new QueryRunner();
             String sql = "select count(1) from project";
             count  = runner.query(conn, sql, new BeanHandler<>(Integer.class));
+            conn.close();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         }
@@ -61,6 +64,7 @@ public class projectDao {
             QueryRunner runner = new QueryRunner();
             String sql = "select * from project where categoryId = ?";
             projectEntityList = runner.query(conn, sql, new BeanListHandler<>(projectEntity.class), num);
+            conn.close();
         } catch (SQLException e) {
             throw new RuntimeException(e);
         }

src/com/hellogithub/service/UserService.java

@@ -31,4 +31,7 @@ public class UserService {
     public userEntity findByUserName(String userName) {
         return userDao.findByUserName(userName);
     }
+    public int dedletePieceLabel(int userID,String str){ return userDao.dedletePieceLabel(userID, str);}
+    public String selectLabel(int userID){return userDao.selectLabel(userID);}
+    public int  dedleteAllLabel(int userID){return userDao.dedleteAllLabel(userID);}
 }

src/com/hellogithub/servlet/VerifycodeServlet.java

@@ -25,7 +25,7 @@ public class VerifycodeServlet extends HttpServlet {
 //        request.setCharacterEncoding("UTF-8");
 //        response.setCharacterEncoding("UTF-8");
 //        response.setContentType("text/html; charset=utf-8");
-        //        设置响应头允许ajax跨域访问
+        //        设置响应头允许ajax跨域访问`
 //        response.setHeader("Access-Control-Allow-Origin", "*");
 //        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
 //        response.setHeader("Access-Control-Max-Age", "3600");

src/com/hellogithub/servlet/deleteAllLabelServlet.java

@@ -0,0 +1,50 @@
+package com.hellogithub.servlet;
+
+import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.service.UserService;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.HashMap;
+
+public class deleteAllLabelServlet extends HttpServlet {
+    private UserService userService = new UserService();
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        doPost(req, resp);
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+
+        PrintWriter writer = resp.getWriter();
+        String id = req.getParameter("xxxxx");
+        int num = userService.dedleteAllLabel(Integer.parseInt(id));
+        if(num == 0 ){
+            setResultError("删除失败",writer);
+        }else{
+            setResultOK("删除成功",writer);
+        }
+
+    }
+    public void setResult(Integer code, String msg, PrintWriter writer) {
+        HashMap<String, Object> result = new HashMap<>();
+        result.put("code", code);
+        result.put("msg", msg);
+        String jsonString = JSONObject.toJSONString(result);
+        writer.println(jsonString);
+        writer.close();
+    }
+
+    public void setResultError(String msg, PrintWriter writer) {
+        setResult(500, msg, writer);
+    }
+
+    public void setResultOK(String msg, PrintWriter writer) {
+        setResult(200, msg, writer);
+    }
+}

src/com/hellogithub/servlet/deletelabelServlet.java

@@ -0,0 +1,49 @@
+package com.hellogithub.servlet;
+
+import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.service.UserService;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.HashMap;
+
+public class deletelabelServlet extends HttpServlet {
+    private UserService userService = new UserService();
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        doPost(req, resp);
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        PrintWriter writer = resp.getWriter();
+        String id = req.getParameter("xxxxx");
+        String str = req.getParameter("xxxxx");
+        int num = userService.dedletePieceLabel(Integer.parseInt(id),str);
+        if(num == 0 ){
+            setResultError("删除失败",writer);
+        }else{
+            setResultOK("删除成功",writer);
+        }
+    }
+    public void setResult(Integer code, String msg, PrintWriter writer) {
+        HashMap<String, Object> result = new HashMap<>();
+        result.put("code", code);
+        result.put("msg", msg);
+        String jsonString = JSONObject.toJSONString(result);
+        writer.println(jsonString);
+        writer.close();
+    }
+
+    public void setResultError(String msg, PrintWriter writer) {
+        setResult(500, msg, writer);
+    }
+
+    public void setResultOK(String msg, PrintWriter writer) {
+        setResult(200, msg, writer);
+    }
+}

src/com/hellogithub/servlet/selectUserLabelServlet.java

@@ -0,0 +1,56 @@
+package com.hellogithub.servlet;
+
+import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.service.UserService;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.*;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.HashMap;
+
+public class selectUserLabelServlet extends HttpServlet {
+    private UserService userService = new UserService();
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        doPost(req, resp);
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        resp.setCharacterEncoding("UTF-8");
+        resp.setContentType("text/html; charset=utf-8");
+        //        设置响应头允许ajax跨域访问
+        String curOrigin = req.getHeader("Origin");
+        resp.setHeader("Access-Control-Allow-Origin", curOrigin == null ? "true" : curOrigin);
+        resp.setHeader("Access-Control-Allow-Credentials", "true");
+        resp.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, HEAD");
+        resp.setHeader("Access-Control-Max-Age", "3600");
+        resp.setHeader("Access-Control-Allow-Headers", "access-control-allow-origin, authority, content-type, version-info, X-Requested-With");
+        resp.setContentType("application/json;charset=UTF-8");
+
+
+        PrintWriter writer = resp.getWriter();
+        String id = req.getParameter("xxxxx");
+        String jsonString = JSONObject.toJSONString(userService.selectLabel(Integer.parseInt(id)));
+        writer.println(jsonString);
+        writer.close();
+
+    }
+    public void setResult(Integer code, String msg, PrintWriter writer) {
+        HashMap<String, Object> result = new HashMap<>();
+        result.put("code", code);
+        result.put("msg", msg);
+        String jsonString = JSONObject.toJSONString(result);
+        writer.println(jsonString);
+        writer.close();
+    }
+
+    public void setResultError(String msg, PrintWriter writer) {
+        setResult(500, msg, writer);
+    }
+
+    public void setResultOK(String msg, PrintWriter writer) {
+        setResult(200, msg, writer);
+    }
+}