1,登录前端和后端对接

src/core/user/Administrator.java

@@ -1,4 +1,4 @@
 package core.user;
 
-public class Administrator {
+public class Administrator extends User {
 }

src/core/user/utils/AccountManagement.java

@@ -1,9 +1,11 @@
 package core.user.utils;
 
+import core.user.Administrator;
 import core.user.User;
 import dao.DBManagement;
 import error.GExcptAccount;
 import error.GExcptSQL;
+import utils.Utils;
 
 import java.lang.reflect.InvocationTargetException;
 import java.sql.ResultSet;
@@ -16,12 +18,12 @@ public interface AccountManagement {
             "student",
             "teacher"
     };
-    static User login(String id, String password) throws GExcptSQL, GExcptAccount {
+    static User login(String id, String password) throws GExcptSQL, GExcptAccount, SQLException {
         ResultSet rs = null;
         String sql = null;
         String userType = null;
         for(String userTable:userTables){
-            sql = "SELECT * FROM "+userTable+"WHERE id="+id;
+            sql = "SELECT * FROM "+userTable+" WHERE id=\'"+id+"\'";
             try {
                 rs = DBManagement.query(sql);
             } catch (Exception e) {
@@ -35,8 +37,9 @@ public interface AccountManagement {
         if(rs==null){
             throw new GExcptAccount("id "+id+"don't exists");
         }
+        rs.next();
         try {
-            if(rs.getString("password")!=password)
+            if(!rs.getString(2).equals(password))
                 throw new GExcptAccount("password wrong");
             return createUser(userType,rs);
         } catch (SQLException e) {
@@ -56,7 +59,7 @@ public interface AccountManagement {
     }
     static User getUser(String userType){
         try {
-            return (User)Class.forName("core.user."+userType).getDeclaredConstructor().newInstance();
+            return (Administrator)Class.forName("core.user."+ Utils.toUpperFristChar(userType)).getDeclaredConstructor().newInstance();
         } catch (InstantiationException e) {
             e.printStackTrace();
         } catch (IllegalAccessException e) {

src/dao/DBManagement.java

@@ -50,6 +50,7 @@ public class DBManagement {
             con = DBManagement.getConnection();
             Statement stmt = con.createStatement();
             rs = stmt.executeQuery(sql);
+            System.out.println(rs);
         } catch (SQLException e) {
             throw new GExcptSQL("Connect Failure");
         }finally {

src/servlet/account/login.java

@@ -1,6 +1,7 @@
 package servlet.account;
 
 import java.io.IOException;
+import java.sql.SQLException;
 
 import javax.servlet.ServletException;
 import javax.servlet.annotation.WebServlet;
@@ -10,6 +11,9 @@ import javax.servlet.http.HttpServletResponse;
 
 import core.user.Student;
 import core.user.User;
+import core.user.utils.AccountManagement;
+import error.GExcptAccount;
+import error.GExcptSQL;
 
 @WebServlet("/login")
 public class login extends HttpServlet {
@@ -17,12 +21,16 @@ public class login extends HttpServlet {
       throws ServletException, IOException {
     String id=request.getParameter("id");
     String password=request.getParameter("password");
-    if(id=="201630126050"&&password=="823169880")
+    User user = null;
-    {
+      try {
-      request.getRequestDispatcher("/service").forward(request,response);
+          user = AccountManagement.login(id,password);
-    }
+      } catch (GExcptSQL | SQLException gExcptSQL) {
-    else
+          gExcptSQL.printStackTrace();
-      response.sendRedirect("");
+      } catch (GExcptAccount gExcptAccount) {
+          gExcptAccount.printStackTrace();
+      }
+      request.getSession().setAttribute("User",user);
+      request.getRequestDispatcher("/home.jsp").forward(request,response);
   }
 
   protected void doGet(HttpServletRequest request, HttpServletResponse response)

src/utils/Utils.java

@@ -0,0 +1,9 @@
+package utils;
+
+public interface Utils {
+    public static String toUpperFristChar(String string) {
+        char[] charArray = string.toCharArray();
+        charArray[0] -= 32;
+        return String.valueOf(charArray);
+    }
+}

web/WEB-INF/web.xml

@@ -24,4 +24,8 @@
         <servlet-name>default</servlet-name>
         <url-pattern>*.js</url-pattern>
     </servlet-mapping>
+    <servlet-mapping>
+        <servlet-name>default</servlet-name>
+        <url-pattern>*.png</url-pattern>
+    </servlet-mapping>
 </web-app>

web/login.jsp

@@ -25,7 +25,7 @@
     </div>
     <div class="login-cont">
         <div class="logo2">GDMS</div>
-        <form method="post" action="/login">
+        <form method="post" action="login">
             <input class="input-text username-text" type="text" name="id"
                    placeholder="请输入学号">
             <input class="input-text password-text" type="password" name="password"