SpringBoot项目中遇到的BUG问题及解决方法

java.lang.ClassCastException: 
com.app.entity.User cannot be cast to java.lang.Integer

org.mybatis.spring.MyBatisSystemException: 
nested exception is org.apache.ibatis.binding.BindingException: 
Parameter 'user_type' not found. Available parameters are [2, 1, 0, param1, param2, param3]

public User getUser(String name);

public User getUser(@Param("name") String name,@Param("password") String password); 

mapper接口：
PkRecord findByPkStudentNumber(String pkStudentNumber);
对应的mapper配置文件
<select id="findByPkStudentNumber" resultMap="recordMap" >
 SELECT * FROM pk_record
 <where>
 <if test="pkStudentNumber!=null">
 pk_student_number=#{pkStudentNumber}
 </if>
 </where>
 </select>

<select id="findByPkStudentNumber" resultMap="recordMap" >
 SELECT * FROM pk_record
 <where>
 <if test="_parameter!=null">
 pk_student_number=#{_parameter}
 </if>
 </where>
 </select>

PkRecord findByPkStudentNumber(@Param("pkStudentNumber") String pkStudentNumber);

org.apache.ibatis.binding.BindingException: 
Mapper method 'com.hoomsun.mybatis.dao.CostMapperDao.dongtaislq' 
has an unsupported return type: class java.lang.String

public void dongtaislq(Map map);

<if test="categoryIds!=null and categoryIds!=' ' ">
 AND category_id IN
 <foreach collection="categoryIds" item="categoryIds" open="(" separator="," close=")">
 #{categoryIds}
 </foreach>
</if>

<if test="categoryIds!=null and categoryIds.size>0" >
 AND category_id IN
 <foreach collection="categoryIds" item="categoryIds" open="(" separator="," close=")">
 #{categoryIds}
 </foreach>
</if>

<insert id="saveUser" useGeneratedKeys="true" keyColumn="id" >
 insert into user(username,password,nickname) values (#{username},#{password},#{nickname})
</insert>

<insert id="saveUser" useGeneratedKeys="true" keyProperty="id" >
 insert into user(username,password,nickname) values (#{username},#{password},#{nickname})
</insert>

//子容器启动失败
ERROR 8760 --- [cat-startStop-1] org.apache.catalina.core.ContainerBase : A child container failed during start
//未能启动Tomcat组件
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: 
Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[]]

<insert id="insert" useGeneratedKeys="true" keyProperty="id">
 insert into mmall_category (id, name, status)
 values (#{id}, #{name},#{status})
 </insert>

void insert(Category category);

<insert id="insert" useGeneratedKeys="true" keyProperty="id">
 insert into mmall_category 
 (id, name
 <if test="status != null">
 ,status
 </if>)
 values (#{id}, #{name}
 <if test="status != null">
 ,#{status}
 </if>)
 </insert>

<association property="user" column="user_id" select="com.mapper.UserMapper.selectByPrimaryKey"/>

@SpringBootApplication
@EnableGlobalMethodSecurity(securedEnabled = true)
public class Application {
 public static void main(String[] args) {
 SpringApplication.run(Application.class, args);
 }
}

mybatis:
 configuration:
 log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

Creating a new SqlSession
SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2a5ca7d7] was not 
registered for synchronization because synchronization is not active
JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@9a51d74] will not be managed by Spring
Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2a5ca7d7]

Description:
The dependencies of some of the beans in the application context form a cycle:
 xxxController (field private aaaService xxxController.aaaService)
┌─────┐
| aaaImpl defined in file [aaaImpl.class]
↑ ↓
| bbbImpl (field private aaaService bbbImpl.orderService)
└─────┘

spring:
 resources:
 chain:
 gzipped: true