增加addFileServlet

src/com/hellogithub/dao/fileDao.java

@@ -40,4 +40,19 @@ public class fileDao {
         }
         return fileEntity;
     }
+
+    public  int addLookCount(int id )
+    {
+        int num ;
+        try {
+            Connection conn = JdbcUtils.getConnection();
+            QueryRunner runner = new QueryRunner();
+            String sql="update onefile set lookNum = lookNum + 1 where id = ?";
+            num = runner.update(conn,sql,id);
+            conn.close();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return num;
+    }
 }

src/com/hellogithub/service/oneFileService.java

@@ -41,4 +41,5 @@ public class oneFileService {
         fileEntity.setUserName(userName);
         return  fileEntity;
     }
+    public  int addLookCount(int id ){return fileDao.addLookCount(id);}
 }

src/com/hellogithub/servlet/systemAdmin/addFileLookCountServlet.java

@@ -0,0 +1,37 @@
+package com.hellogithub.servlet.systemAdmin;
+
+import com.hellogithub.service.oneFileService;
+
+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;
+@WebServlet("/addFileLookCount")
+public class addFileLookCountServlet extends HttpServlet {
+    private oneFileService oneFileService = new oneFileService();
+    @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");
+        String id =req.getParameter("id");
+        int num = oneFileService.addLookCount(Integer.parseInt(id));
+        PrintWriter writer = resp.getWriter();
+        writer.println(num);
+    }
+}