diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/Campus_second-hand_trading_platform.iml b/.idea/Campus_second-hand_trading_platform.iml
new file mode 100644
index 0000000..d6ebd48
--- /dev/null
+++ b/.idea/Campus_second-hand_trading_platform.iml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..639900d
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..a4feb50
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/Campus_second-hand_trading_platform.iml" filepath="$PROJECT_DIR$/.idea/Campus_second-hand_trading_platform.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/trading_platform/.gitattributes b/trading_platform/.gitattributes
deleted file mode 100644
index 3b41682..0000000
--- a/trading_platform/.gitattributes
+++ /dev/null
@@ -1,2 +0,0 @@
-/mvnw text eol=lf
-*.cmd text eol=crlf
diff --git a/trading_platform/.gitignore b/trading_platform/.gitignore
deleted file mode 100644
index 3f1f3e8..0000000
--- a/trading_platform/.gitignore
+++ /dev/null
@@ -1,34 +0,0 @@
-HELP.md
-target/
-!.mvn/wrapper/maven-wrapper.jar
-!**/src/main/**/target/
-!**/src/test/**/target/
-
-### STS ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
-
-### IntelliJ IDEA ###
-.idea
-*.iws
-*.iml
-*.ipr
-
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-build/
-!**/src/main/**/build/
-!**/src/test/**/build/
-
-### VS Code ###
-.vscode/
-.idea/
diff --git a/trading_platform/README.md b/trading_platform/README.md
new file mode 100644
index 0000000..cdfeccd
--- /dev/null
+++ b/trading_platform/README.md
@@ -0,0 +1,75 @@
+# 目录说明
+### 展示`trading_platform`的 Java 项目的目录结构。项目使用`Maven`构建的。
+```
+trading_platform
+├── .mvn/
+├── src/
+│   ├── main/
+│   │   ├── java/
+│   │   │   ├── com.trading_platform/
+│   │   │   │   ├── config/
+│   │   │   │   │   ├── (各种配置类)
+│   │   │   │   │   └── WebConfig.java
+│   │   │   │   ├── controller/
+│   │   │   │   │   ├── (各种controller)
+│   │   │   │   │   └── UsersController.java
+│   │   │   │   ├── exception/
+│   │   │   │   │   ├── (各种异常类)
+│   │   │   │   │   └── GlobalExceptionHandler.java
+│   │   │   │   ├── interceptors/
+│   │   │   │   │   ├── (各种拦截器)
+│   │   │   │   │   └── LoginInterceptor.java
+│   │   │   │   ├── mapper/
+│   │   │   │   │   └── (各种mapper)
+│   │   │   │   ├── service/
+│   │   │   │   │   ├── impl/
+│   │   │   │   │   │  └── (各种serviceImpl)
+│   │   │   │   │   └── (各种service)
+│   │   │   │   ├── util/
+│   │   │   │   │   ├── (各种工具类)
+│   │   │   │   │   ├── JwtUtil.java
+│   │   │   │   │   └── Sha256Util.java
+│   │   │   │   └──TradingPlatformApplication.java
+│   │   ├── resources/
+│   │   │   ├── static/
+│   │   │   │   └── (各种静态资源)
+│   │   │   ├── templates/
+│   │   │   │   └── (各种模板)
+│   │   │   └──  application.yml
+│   │   └── test/
+│   │   │   ├── java/
+│   │   │   │   ├── com.trading_platform/
+│   │   │   │   │   └── TradingPlatformApplicationTest.java
+├── .gitignore
+├── HELP.md
+├── mvnw
+├── mvnw.cmd
+├── pom.xml
+External Libraries:
+├── JDK<17>
+└── 各种依赖包
+```
+### 包含以下主要部分：
+1. 主源代码 (`src/main/java/com.trading_platform/`)：
+- **config/**：存放各种配置类，如WebConfig.java。
+- **controller/**：存放各种控制器类，如UsersController.java。
+- **exception/**：存放各种异常处理类，如GlobalExceptionHandler.java。
+- **interceptors/**：存放各种拦截器类，如LoginInterceptor.java。
+- **mapper/**：存放各种Mapper类。
+- **service/**：存放各种服务接口及其实现类。
+- **util/**：存放各种工具类，如JwtUtil.java和Sha256Util.java。
+- **TradingPlatformApplication.java**：项目的主启动类。
+2. 静态资源文件 (`src/main/resources/`)：
+- **static/**：存放各种静态资源。
+- **templates/**：存放各种模板文件。
+- **application.yml**：项目的配置文件。
+3. 测试代码 (`src/test/java/com.trading_platform/`)：
+- **TradingPlatformApplicationTest.java**：项目的测试类。
+4. 其他文件：
+- **.gitignore**：Git忽略文件。
+- **HELP.md**：帮助文档。
+- **mvnw** 和 **mvnw.cmd**：Maven Wrapper脚本。
+- **pom.xml**：Maven项目的配置文件。
+5. 外部库：
+- **JDK<17>**：使用的Java开发工具包版本。
+- **各种 Maven 依赖包**：项目依赖的第三方库。
\ No newline at end of file
diff --git a/trading_platform/target/classes/application.yml b/trading_platform/target/classes/application.yml
new file mode 100644
index 0000000..b1f565d
--- /dev/null
+++ b/trading_platform/target/classes/application.yml
@@ -0,0 +1,6 @@
+spring:
+  datasource:
+    name: localhost
+    url: jdbc:mysql://localhost:3306/secondhandtransactions?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=Asia/Shanghai
+    username: root
+    password: 123456
\ No newline at end of file
diff --git a/trading_platform/target/classes/com/trading_platform/TradingPlatformApplication.class b/trading_platform/target/classes/com/trading_platform/TradingPlatformApplication.class
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diff --git a/trading_platform/target/classes/com/trading_platform/entity/Result.class b/trading_platform/target/classes/com/trading_platform/entity/Result.class
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diff --git a/trading_platform/target/classes/com/trading_platform/utils/Sha256Util$1.class b/trading_platform/target/classes/com/trading_platform/utils/Sha256Util$1.class
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