Spring集成JPA配置懒加载报错解决方案

<!--配置openmanager-->
<filter>
 <filter-name>openEntity</filter-name>
 <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
</filter>
<filter-mapping>
 <filter-name>openEntity</filter-name>
 <url-pattern>/*</url-pattern>
</filter-mapping>

 　　 @ManyToOne(fetch = FetchType.LAZY)
   @JoinColumn(name="department_id")
   @JsonIgnoreProperties(value = {"hibernateLazyInitializer","handler","fieldHandler"})
   private Department department;

public class CustomMapper extends ObjectMapper {
  public CustomMapper() {
    this.setSerializationInclusion(JsonInclude.Include.NON_NULL);
    // 设置 SerializationFeature.FAIL_ON_EMPTY_BEANS 为 false
    this.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
  }
}

<!--注解支持-->
<mvc:annotation-driven>
  <mvc:message-converters>
    <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
      <property name="supportedMediaTypes">
        <list>
          <value>application/json; charset=UTF-8</value>
          <value>application/x-www-form-urlencoded; charset=UTF-8</value>
        </list>
      </property>
      <!-- No serializer:配置 objectMapper 为我们自定义扩展后的 CustomMapper,解决了返回对象有关系对象的报错问题 -->
      <property name="objectMapper">
        <bean class="com.logo.aisell.util.CustomMapper"></bean>
      </property>
    </bean>
  </mvc:message-converters>
</mvc:annotation-driven>