自定义mybatis拦截器

在自定义mybatis拦截器中&＃xff0c;如果通过&＃64;Autowired注入对象会报错

Requested bean is currently in creation: Is there an unresolvable circular reference

解决方案


import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlCommandType;
import org.apache.ibatis.plugin.*;
import org.springframework.stereotype.Component;import java.lang.reflect.Field;
import java.util.Date;
import java.util.Properties;/*** &＃64;author xrj* &＃64;date 2020/5/28*/
&＃64;Slf4j
&＃64;Component
&＃64;Intercepts({&＃64;Signature(type &＃61; Executor.class,method &＃61; "update",args &＃61; {MappedStatement.class,Object.class})})
public class MyUpdateLogInterceptor implements Interceptor {private String UPDATE&＃61;"UPDATE";private String INSERT&＃61;"INSERT";private String CARP&＃61;"com.cdls.carp.";&＃64;Overridepublic Object intercept(Invocation invocation) throws Throwable {MappedStatement mappedStatement &＃61; (MappedStatement) invocation.getArgs()[0];// 获取 SQL 命令SqlCommandType sqlCommandType &＃61; mappedStatement.getSqlCommandType();// 获取参数Object object &＃61; invocation.getArgs()[1];if(object!&＃61;null){Class classObject &＃61; object.getClass();if ( classObject.getName().startsWith(CARP)) {log.info("class:"&＃43;classObject&＃43;"获取到的sql命令为:{}",sqlCommandType);try {if(INSERT.equals(SqlCommandType.INSERT.toString())){//创建人//创建时间Field createDate &＃61; null;try {createDate &＃61; classObject.getDeclaredField("createDate");} catch (NoSuchFieldException e) {//单独捕获&＃xff0c;不能影响逻辑log.error("MyUpdateLogInterceptor createDate获取异常NoSuchFieldException:"&＃43;e.getMessage());}if(createDate!&＃61;null){createDate.setAccessible(true);createDate.set(object,new Date());}Field visible &＃61; null;try {visible &＃61; classObject.getDeclaredField("visible");} catch (NoSuchFieldException e) {log.error("MyUpdateLogInterceptor visible获取异常NoSuchFieldException:"&＃43;e.getMessage());}if(visible!&＃61;null){visible.setAccessible(true);visible.set(object,true);}}else if(UPDATE.equals(SqlCommandType.UPDATE.toString())){Field modifyDate &＃61; null;try {modifyDate &＃61; classObject.getDeclaredField("modifyDate");} catch (NoSuchFieldException e) {log.error("MyUpdateLogInterceptor modifyDate获取异常NoSuchFieldException:"&＃43;e.getMessage());}if(modifyDate!&＃61;null){modifyDate.setAccessible(true);modifyDate.set(object,new Date());}}}catch (IllegalAccessException e) {//id获取异常log.error("id获取异常:",e);}catch (Exception e) {//获取异常log.error("Exception getDeclaredField 获取异常:",e);}}}return invocation.proceed();}&＃64;Overridepublic Object plugin(Object o) {return Plugin.wrap(o,this);}&＃64;Overridepublic void setProperties(Properties properties) {}



import com.cdls.carp.business.service.AllDataHistoryService;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;/**** 對象輔助類* &＃64;author xrj* &＃64;date 2020/5/29*/
&＃64;Component
public class ServiceHelper implements InitializingBean {private static ServiceHelper instance&＃61;null;/*** 自己的對象*/&＃64;Autowiredprivate AllDataHistoryService allDataHistoryService;&＃64;Overridepublic void afterPropertiesSet() throws Exception {ServiceHelper.instance&＃61;this;}public static AllDataHistoryService getAllDataHistoryService(){return instance.allDataHistoryService;}
}

也可以这样

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;/*** &＃64;author ckinghan* &＃64;title: SpringContextUtil* &＃64;projectName platform* &＃64;description: 获取springcontext中的bean* &＃64;date 2019/10/1811:23*/
&＃64;Component
public class SpringContextUtil implements ApplicationContextAware {public static ApplicationContext context;&＃64;Overridepublic void setApplicationContext(ApplicationContext context) throws BeansException {SpringContextUtil.context &＃61; context;}/*** 获取容器中的实例* &＃64;param clazz 根据class获取Spring容器中对应的Bean类*/public static T getBean( Class clazz){return context.getBean(clazz);}public static ApplicationContext getContext(){return context;}
}

博主强烈推荐&＃xff1a;https://blog.csdn.net/persistencegoing/article/details/84376427

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