package doumeemes.config.mybatis;
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import doumeemes.core.model.LoginUserInfo;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.ibatis.binding.MapperMethod;
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import org.apache.ibatis.executor.Executor;
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import org.apache.ibatis.mapping.MappedStatement;
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import org.apache.ibatis.mapping.SqlCommandType;
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import org.apache.ibatis.plugin.*;
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import org.apache.shiro.SecurityUtils;
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import org.springframework.stereotype.Component;
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import org.springframework.util.ReflectionUtils;
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import java.lang.reflect.Field;
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import java.util.*;
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/**
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* MyBatis 拦截器
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* - INSERT语句默认填充创建人和创建时间字段
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* - UPDATE语句默认填充更新人和更新时间字段
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* @author Eva.Caesar Liu
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* @date 2022/04/18 18:12
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*/
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@Slf4j
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@Component
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@Intercepts({
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@Signature(type= Executor.class, method = "update", args={MappedStatement.class, Object.class})
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})
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public class MyBatisInterceptor implements Interceptor {
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private static final String CREATE_TIME = "createTime";
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private static final String CREATE_USER = "createUser";
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private static final String UPDATE_TIME = "updateTime";
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private static final String UPDATE_USER = "updateUser";
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@Override
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public Object intercept(Invocation invocation) throws Throwable {
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MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];
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SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType();
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Object target = invocation.getArgs()[1];
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if(target instanceof MapperMethod.ParamMap) {
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try {
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target = ((MapperMethod.ParamMap) target).get("param1");
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} catch (Exception e) {
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}
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}
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if (target == null)
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return invocation.proceed();
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// 创建语句
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if (SqlCommandType.INSERT == sqlCommandType) {
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this.handleOperaStatement(target, CREATE_TIME, CREATE_USER);
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}
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// 更新语句
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else if (SqlCommandType.UPDATE == sqlCommandType) {
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this.handleOperaStatement(target, UPDATE_TIME, UPDATE_USER);
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}
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return invocation.proceed();
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}
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@Override
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public Object plugin(Object o) {
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return Plugin.wrap(o, this);
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}
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/**
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* 处理新增和编辑语句
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* @author Eva.Caesar Liu
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* @date 2019/3/2 11:52
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*/
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private void handleOperaStatement(Object target, String... fieldNames) throws Exception{
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// 操作时间
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Field operaTimeField = ReflectionUtils.findField(target.getClass(), fieldNames[0]);
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if (operaTimeField != null) {
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Object operaTime = this.getFieldValue(operaTimeField, target);
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if (operaTime == null) {
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this.setFieldValue(operaTimeField, target, new Date());
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}
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}
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// 操作人
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Field operaUserField = ReflectionUtils.findField(target.getClass(), fieldNames[1]);
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if (operaUserField != null) {
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Object operaUser = this.getFieldValue(operaUserField, target);
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if (operaUser == null && this.getLoginUser()!=null) {
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this.setFieldValue(operaUserField, target, this.getLoginUser().getId());
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}
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}
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}
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/**
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* 给属性赋值
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* @author Eva.Caesar Liu
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* @date 2019/3/2 11:36
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*/
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private void setFieldValue(Field field, Object target, Object value) throws Exception {
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field.setAccessible(true);
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field.set(target, value);
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field.setAccessible(false);
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}
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/**
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* 获取属性值
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* @author Eva.Caesar Liu
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* @date 2019/3/2 11:40
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*/
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private Object getFieldValue(Field field, Object target) throws Exception {
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field.setAccessible(true);
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Object value = field.get(target);
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field.setAccessible(false);
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return value;
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}
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/**
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* 获取登录用户信息
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* @author Eva.Caesar Liu
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* @date 2022/04/18 18:12
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*/
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private LoginUserInfo getLoginUser () {
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try {
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return (LoginUserInfo) SecurityUtils.getSubject().getPrincipal();
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}catch (Exception e){
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return null;
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}
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}
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}
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