Add example in README.md

Author: ralgond

README.md

@@ -29,6 +29,40 @@ INSERT INTO fruits (name, category, price) VALUES ('Bob', 'B', 200)
 
 refer to [test_mybatis.py](https://github.com/ralgond/mybatis-py/blob/main/test/test_mybatis.py)、[test2.xml](https://github.com/ralgond/mybatis-py/blob/main/mapper/test.xml)
 
+创建一个mapper目录，创建一个文件mapper/test.xml，如下:
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper>
+    <select id="testBasic1">
+        SELECT * from fruits where id=#{id}
+    </select>
+</mapper>
+```
+编写python文件test.py, 如下：
+```python
+from mybatis import *
+import mysql.connector
+
+def main():
+    # 连接到 MySQL 数据库
+    conn = mysql.connector.connect(
+        host="localhost",  # MySQL 主机地址
+        user="mybatis",  # MySQL 用户名
+        password="mybatis",  # MySQL 密码
+        database="mybatis"  # 需要连接的数据库
+    )
+
+    mb = Mybatis(conn, "mapper", cache_memory_limit=50*1024*1024)
+
+    ret = mb.select_one("testBasic1", {'id':1})
+
+    print(ret)
+
+if __name__ == "__main__":
+    main()
+```
+
 ## Dynamic SQL
 ### ${}和#{}的区别
 #{}是一个占位符，为prepared statement而存在，在MapperManager处理后会变成字符'?'；

example2.py

@@ -0,0 +1,20 @@
+from mybatis import *
+import mysql.connector
+
+def main():
+    # 连接到 MySQL 数据库
+    conn = mysql.connector.connect(
+        host="localhost",  # MySQL 主机地址
+        user="mybatis",  # MySQL 用户名
+        password="mybatis",  # MySQL 密码
+        database="mybatis"  # 需要连接的数据库
+    )
+
+    mb = Mybatis(conn, "mapper", cache_memory_limit=50*1024*1024)
+
+    ret = mb.select_one("testBasic1", {'id':1})
+
+    print(ret)
+
+if __name__ == "__main__":
+    main()

mapper/test.xml

@@ -151,4 +151,8 @@
     <select id="testStringReplace">
         SELECT * from fruits_${date} where id=#{id}
     </select>
+
+    <select id="testBasic1">
+        SELECT * from fruits where id=#{id}
+    </select>
 </mapper>

setup.py

@@ -2,7 +2,7 @@
 
 setup(
     name='mybatis',
-    version='0.0.3',
+    version='0.0.4',
     description='A python ORM like mybatis.',
     long_description=open('README.md').read(),
     long_description_content_type='text/markdown',  # 如果你使用的是Markdown格式的README
@@ -16,7 +16,8 @@
     ],
     classifiers=[
         'Programming Language :: Python :: 3',
-        'License :: OSI Approved :: Apache License',
+        # 'License :: OSI Approved :: Apache-2.0 License',
+        'License :: OSI Approved :: Apache Software License',
         'Operating System :: OS Independent',
     ],
     python_requires='>=3.8',