fix cast bug

Author: zheng-zy

spring-boot-restful-api/src/main/java/com/example/service/impl/UserServiceImpl.java

@@ -60,7 +60,7 @@ public SysUser queryUserById(String userId) {
             e.printStackTrace();
         }
 
-        return userMapper.selectByPrimaryKey(userId);
+        return userMapper.selectByPrimaryKey(Integer.parseInt(userId));
     }
 
     @Override

spring-boot-restful-api/src/test/java/com/example/SpringBootRestfulApiApplicationTests.java

@@ -1,7 +1,10 @@
 package com.example;
 
+import com.alibaba.fastjson.JSON;
 import com.example.dao.SysRoleMapper;
+import com.example.dao.SysUserMapper;
 import com.example.entity.SysRole;
+import com.example.entity.SysUser;
 import lombok.extern.slf4j.Slf4j;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -18,6 +21,8 @@ public class SpringBootRestfulApiApplicationTests {
 
 	@Resource
 	private SysRoleMapper sysRoleMapper;
+	@Resource
+	private SysUserMapper sysUserMapper;
 
 	@Test
 	public void contextLoads() {
@@ -36,4 +41,10 @@ public void testSendMail(){
 		log.error("错误", e);
 	}
 
+	@Test
+	public void testGetOne(){
+		SysUser sysUser = sysUserMapper.selectByPrimaryKey(1);
+		System.out.println(JSON.toJSONString(sysUser));
+	}
+
 }