diff --git a/src/fxml/Login.fxml b/src/fxml/Login.fxml
index f7673823fbd8dbcc6d63b056fe847f1f86cbff51..ce2e46da36c14fe08be71238bb0db97fba1088de 100644
--- a/src/fxml/Login.fxml
+++ b/src/fxml/Login.fxml
@@ -98,9 +98,9 @@
       <top>
         <HBox alignment="CENTER_LEFT" prefHeight="73.0" prefWidth="573.0" BorderPane.alignment="CENTER">
           <children>
-            <Label text="Welcome to XXX" textAlignment="LEFT">
+            <Label text="Welcome to ImgZip" textAlignment="LEFT">
               <font>
-                <Font size="36.0" />
+                <Font name="System Bold" size="36.0" />
               </font>
             </Label>
           </children>
diff --git a/src/imgzip/LoginSignIn/ChangePassword.java b/src/imgzip/LoginSignIn/ChangePassword.java
index eb440ea4ed51d4dd3516fb6d608f5444fe51930f..a720f9c422a3d9e5ed17f74e97539e66df13ddcd 100644
--- a/src/imgzip/LoginSignIn/ChangePassword.java
+++ b/src/imgzip/LoginSignIn/ChangePassword.java
@@ -10,6 +10,8 @@ import javafx.stage.Stage;
 /**
  @Author:   肖尧
  @Date: 2019.12.12
+
+ 改变密码的页面类，写成构造方法形式被调用。
  */
 public class ChangePassword {
 
@@ -37,6 +39,13 @@ public class ChangePassword {
     }
 }
 
+/**
+ @Author:   肖尧
+ @Date: 2019.12.12
+
+ 提醒用户成功改变密码的页面类，写成构造方法形式被调用。
+ */
+
 class ChangePasswordSuccessfully{
 
     public ChangePasswordSuccessfully(){
diff --git a/src/imgzip/LoginSignIn/CreateAccount.java b/src/imgzip/LoginSignIn/CreateAccount.java
index cab5f16d98c9fccfa03983eb10eb3bd4181f3813..0d61947b0474beddd76eac83e35f0d0adb059571 100644
--- a/src/imgzip/LoginSignIn/CreateAccount.java
+++ b/src/imgzip/LoginSignIn/CreateAccount.java
@@ -19,6 +19,8 @@ import java.sql.ResultSet;
 /**
  @Author:   肖尧
  @Date: 2019.12.4
+
+ 提供用户创造密码的页面类，通过调用构造方法创建。
  */
 
 public class CreateAccount {
@@ -39,6 +41,10 @@ public class CreateAccount {
             already.setVisible(false);
             already2.setVisible(false);
             createAccount.setDisable(true);
+            /**
+             * change方法：当account输入框失去/得到焦点时，检查一次是否与数据库中的某个账号重复
+             * 保证账号的唯一性。
+             */
 
 
             userName.focusedProperty().addListener(new ChangeListener<Boolean>() {
@@ -101,6 +107,12 @@ public class CreateAccount {
                 }
             });
 
+            /**
+                email的change方法：
+                当email输入框失去\获得焦点时，检查email框输入的值是否符合邮箱格式，以及是否已经在数据库中存在。
+                保证格式正确以及数据库中数据唯一性。
+             */
+
             email.focusedProperty().addListener(new ChangeListener<Boolean>() {
                 @Override
                 public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) {
@@ -108,10 +120,10 @@ public class CreateAccount {
                     if(checkIfIsEmail(email.getText())){
 
                         if(already2.getText().equals("Invalid email!")){
-                            already2.setText("Already taken!!");
+                            already2.setText("Already taken!");
                         }
 
-                        if (already2.isVisible()){
+                        if (already2.isVisible() || "".equals(email.getText())){
                             already2.setVisible(false);
                         }
 
@@ -164,12 +176,15 @@ public class CreateAccount {
 
                     }else{
 
-                         if("Already taken!!".equals(already2.getText())){
+                         if("Already taken!".equals(already2.getText())){
                              already2.setText("Invalid email!");
                          }
 
-                         if("".equals(already2.getText())){
+                         if("".equals(email.getText())){
                              already2.setVisible(false);
+                             if(!createAccount.isDisable()){
+                                 createAccount.setDisable(true);
+                             }
 
                          }else {
 
@@ -181,8 +196,6 @@ public class CreateAccount {
                                 createAccount.setDisable(true);
                             }
 
-
-
                          }
                     }
                 }
@@ -203,7 +216,9 @@ public class CreateAccount {
 
     }
 
-
+    /**
+     * 检查邮箱格式是否正确.
+     */
     public boolean checkIfIsEmail(String email){
 
         String check = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";
@@ -218,6 +233,13 @@ public class CreateAccount {
 
 }
 
+/**
+ @Author:   肖尧
+ @Date: 2019.12.12
+
+ 提醒用户成功改变密码的页面类，写成构造方法形式被调用。
+ */
+
 class CreateSuccessfully{
 
     public CreateSuccessfully(){
diff --git a/src/imgzip/LoginSignIn/CreateAccountController.java b/src/imgzip/LoginSignIn/CreateAccountController.java
index 5822ba6b062820c50d4cf1a7fc8d62b3a31e5cd7..b18aef06df0eae362db1015d326f79575f351e12 100644
--- a/src/imgzip/LoginSignIn/CreateAccountController.java
+++ b/src/imgzip/LoginSignIn/CreateAccountController.java
@@ -222,16 +222,13 @@ public class CreateAccountController {
      * 检查是否点击了同意privacy协议，如果不同意，则无法点击 createaccount 按钮。
      */
     public void checkIfSelectedPrivacy(){
-        if(!judgeAccountExists && !judgeEmialexist && createAccount.isDisable() && !already2.isVisible() && !already.isVisible()){
-            createAccount.setDisable(false);
 
-        }
 
         boolean userNmae = "".equals(userName.getText());
         boolean emial = "".equals(email.getText());
 
-        if(!agree.isSelected() || userNmae || emial ){
-            createAccount.setDisable(true);
+        if(agree.isSelected() && !userNmae && !emial && createAccount.isDisable() && !already.isVisible() && !already2.isVisible()){
+            createAccount.setDisable(false);
         }
     }
 
diff --git a/src/imgzip/LoginSignIn/DataBaseController.java b/src/imgzip/LoginSignIn/DataBaseController.java
index 2e6a98fa761dcca49d2579b62fb0772bebd8d811..a5980f5227e04c0a77bb19094d69064c70faca70 100644
--- a/src/imgzip/LoginSignIn/DataBaseController.java
+++ b/src/imgzip/LoginSignIn/DataBaseController.java
@@ -4,6 +4,12 @@ import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
+/**
+ @Author:   肖尧
+ @Date: 2019.12.12
+
+ 数据库操作继承类，用于数据库各项操作。
+ */
 
 public class DataBaseController {
 
diff --git a/src/imgzip/LoginSignIn/FindPassword.java b/src/imgzip/LoginSignIn/FindPassword.java
index adb4586086324c2582d84125ef96b1f7fdc9ba39..ba70bfc4fa6e03dcd5229faca8a2959678573da0 100644
--- a/src/imgzip/LoginSignIn/FindPassword.java
+++ b/src/imgzip/LoginSignIn/FindPassword.java
@@ -6,6 +6,12 @@ import javafx.scene.Scene;
 import javafx.scene.control.Button;
 import javafx.stage.Stage;
 
+/**
+ @Author:   肖尧
+ @Date: 2019.12.12
+
+ 验证用户，决定用户是否可以改变密码的页面类，写成构造方法形式被调用。
+ */
 public class FindPassword {
 
     public FindPassword(){
diff --git a/src/imgzip/LoginSignIn/GlobalStringManager.java b/src/imgzip/LoginSignIn/GlobalStringManager.java
index 891f7b1c7185f522d0436641b31f0e9a0a382660..d66c9b928690b6558c0dcd08ed6bfc95eaa1603b 100644
--- a/src/imgzip/LoginSignIn/GlobalStringManager.java
+++ b/src/imgzip/LoginSignIn/GlobalStringManager.java
@@ -1,5 +1,12 @@
 package imgzip.LoginSignIn;
 
+/**
+ @Author:   肖尧
+ @Date: 2019.12.12
+
+ 全局变量类，用于项目内页面之间的信息传递。
+ */
+
 public class GlobalStringManager {
     static String account = "";
     static String emial = "";
diff --git a/src/imgzip/LoginSignIn/Login.java b/src/imgzip/LoginSignIn/Login.java
index 929a1e963cee73ed6f9a834712e05fb7cf57dbca..ed31a02f32bf1eb7df8a3a9584c1866c3d782ac3 100644
--- a/src/imgzip/LoginSignIn/Login.java
+++ b/src/imgzip/LoginSignIn/Login.java
@@ -16,6 +16,8 @@ import java.io.*;
 /**
  @Author:   肖尧
  @Date: 2019.12.4
+
+ 登录页面的页面类，用于用户登录页面。
  */
 public class Login extends Application {
 
@@ -91,6 +93,12 @@ public class Login extends Application {
 
 }
 
+/**
+ @Author:   肖尧
+ @Date: 2019.12.12
+
+ 登录页面的启动类，写成构造方法形式被调用，方便该文件夹其他页面调用。
+ */
 
 class Loginbeginner{
     public Loginbeginner(){
diff --git a/src/imgzip/LoginSignIn/LoginBeginner.java b/src/imgzip/LoginSignIn/LoginBeginner.java
index bf4dd6c25c1fac4a08bdd8211c46ba0352da9e6d..0bf981d80d6413a05e68dc048e3edb605181d125 100644
--- a/src/imgzip/LoginSignIn/LoginBeginner.java
+++ b/src/imgzip/LoginSignIn/LoginBeginner.java
@@ -12,6 +12,13 @@ import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileReader;
 
+/**
+ @Author:   肖尧
+ @Date: 2019.12.12
+
+ 登录页面的启动类，写成构造方法形式被调用，方便其他文件夹中其他页面调用。
+ */
+
 public class LoginBeginner {
     public LoginBeginner(){
         try {
diff --git a/src/imgzip/LoginSignIn/LoginController.java b/src/imgzip/LoginSignIn/LoginController.java
index 5bfba7524ae659693e2557b4de6f6fb438ce8e50..12c18bd7002ac9653de17b18337eb26752488eda 100644
--- a/src/imgzip/LoginSignIn/LoginController.java
+++ b/src/imgzip/LoginSignIn/LoginController.java
@@ -144,6 +144,7 @@ public class LoginController {
 
     /**
      设置记住账号密码按钮的方法。
+     调用方法后，将会往文本文件中写入用户名及密码。
      */
 
     public void remember(){