2024年4月14日 12点16分

src/main/java/Main3.java

@@ -23,14 +23,15 @@ public class Main3 {
         UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
 
         User user = new User();
-        user.setUsername("genshinImpact");
+        user.setUsername("Genshin Impact");
-        user.setPassword("Launch");
+        user.setPassword("Launch!");
         user.setGender("男");
-        user.setProvince("北京");
+        user.setProvince("上海");
-        user.setCity("北京");
+        user.setCity("上海");
+        user.setId(8);
         // 执行查询
-        userMapper.addUser(user);
+        int changedLine = userMapper.updateUser(user);
-        System.out.println(user.getId());
+        System.out.println("Line Changed: " + changedLine);
 
         // 提交事务
         sqlSession.commit();

src/main/java/org/starter/myBatis/mapper/UserMapper.java

@@ -14,4 +14,5 @@ public interface UserMapper {
     List<User> selectUserByConfidences(User user);
     void addUser(User user);
     int updateUser(User user);
+    int updateUserInfo(User user);
 }

src/main/resources/org/starter/myBatis/mapper/UserMapper.xml

@@ -81,6 +81,26 @@
             city = #{city}
         where id = #{id};
     </update>
+    <update id="updateUserInfo">
+        update tb_user
+        <set>
+            <if test="username != null and user != ''">
+                username = #{username}
+            </if>
+            <if test="password != null and password != ''">
+                password = #{password}
+            </if>
+            <if test="gender != null and gender != ''">
+                gender = #{gender}
+            </if>
+            <if test="province != null and province != ''">
+                province = #{province}
+            </if>
+            <if test="city != null and province != ''">
+                city = #{city}
+            </if>
+        </set>
+    </update>
 
 
 </mapper>