mybatis打印日志

mybatis-plus:
  configuration:
    #log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
    map-underscore-to-camel-case: true
    cache-enabled: false
  global-config:
    db-config:
      column-underline: true
      db-type: mysql
    refresh: false

添加配置文件   

log-impl: org.apache.ibatis.logging.stdout.StdOutImpl加了这个只能在控制台打印sql以及结果，不会将sql打印到文件里


如果要打印到文件里
在log.xml配置

    <logger name="com.hotent.api.mapper" level="TRACE" />

如果不需要打印结果 ，只需要sql和参数

    <logger name="com.hotent.api.mapper" level="DEBUG"/>

 通过拦截器打印mybatis日志以及执行时间还有参数

package com.peony.common.config;


import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.executor.statement.StatementHandler;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.reflection.DefaultReflectorFactory;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.reflection.SystemMetaObject;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.type.TypeHandlerRegistry;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

import java.sql.Statement;
import java.text.DateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Properties;
import java.util.regex.Matcher;


/**
 * @projectName: mmm
 * @package: com.hotent.api.config
 * @className: SqlExecuteTimeCountInterceptor
 * @author: zy
 * @description:
 * @date: 2023-08-31 15:07
 */

@Intercepts({@Signature(type = StatementHandler.class, method = "query", args = {Statement.class, ResultHandler.class}),
        @Signature(type = StatementHandler.class, method = "update", args = {Statement.class})})
@Component
@Slf4j
public class SqlExecuteTimeCountInterceptor implements Interceptor {



    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        StatementHandler statementHandler = (StatementHandler) invocation.getTarget();
        //通过MetaObject优雅访问对象的属性，这里是访问statementHandler的属性;：MetaObject是Mybatis提供的一个用于方便、
        //优雅访问对象属性的对象，通过它可以简化代码、不需要try/catch各种reflect异常，同时它支持对JavaBean、Collection、Map三种类型对象的操作。
        MetaObject metaObject = MetaObject
                .forObject(statementHandler, SystemMetaObject.DEFAULT_OBJECT_FACTORY, SystemMetaObject.DEFAULT_OBJECT_WRAPPER_FACTORY,
                        new DefaultReflectorFactory());
        //先拦截到RoutingStatementHandler，里面有个StatementHandler类型的delegate变量，其实现类是BaseStatementHandler，然后就到BaseStatementHandler的成员变量mappedStatement
        MappedStatement mappedStatement = (MappedStatement) metaObject.getValue("delegate.mappedStatement");
        //id为执行的mapper方法的全路径名，如com.uv.dao.UserMapper.insertUser
        String id = mappedStatement.getId();
        log.info("id ==> " + id);
        //sql语句类型 select、delete、insert、update
        String sqlCommandType = mappedStatement.getSqlCommandType().toString();
        log.info("类型 ==> " + sqlCommandType);

        BoundSql boundSql = statementHandler.getBoundSql();

        // 获取节点的配置
        Configuration configuration = mappedStatement.getConfiguration();
        // 获取到最终的sql语句
        String newsql = getSql(configuration, boundSql, id);
        log.info("拦截的sql ==>: " + newsql);
        long start = System.currentTimeMillis();
        Object returnValue = invocation.proceed();
        long end = System.currentTimeMillis();
        long time = (end - start);
        log.info("结果 ==>:" + JSON.toJSONString(returnValue));
        log.info("sql耗时 ==>: " + time+"毫秒");
        return returnValue;
    }

    @Override
    public Object plugin(Object target) {
        return Plugin.wrap(target, this);
    }

    @Override
    public void setProperties(Properties properties) {
    }


    /**
     * 封装了一下sql语句，
     * 使得结果返回完整xml路径下的sql语句节点id + sql语句
     *
     * @param configuration
     * @param boundSql
     * @param sqlId
     * @return
     */
    private String getSql(Configuration configuration, BoundSql boundSql, String sqlId) {
        String sql = showSql(configuration, boundSql);
        StringBuilder str = new StringBuilder(100);
        str.append(sqlId);
        str.append(":");
        str.append(sql);
        return str.toString();
    }

    /**
     * 如果参数是String，则添加单引号， 如果是日期，则转换为时间格式器并加单引号；
     * 对参数是null和不是null的情况作了处理<br>
     *
     * @param obj
     * @return
     */
    private String getParameterValue(Object obj) {
        String value = null;
        if (obj instanceof String) {
            value = "'" + obj.toString() + "'";
        } else if (obj instanceof Date) {
            DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT, Locale.CHINA);
            value = "'" + formatter.format(new Date()) + "'";
        } else {
            if (obj != null) {
                value = obj.toString();
            } else {
                value = "";
            }

        }
        return value;
    }

    /**
     * 进行？的替换
     * @param configuration
     * @param boundSql
     * @return
     */
    public String showSql(Configuration configuration, BoundSql boundSql) {
        // 获取参数
        Object parameterObject = boundSql.getParameterObject();
        List<ParameterMapping> parameterMappings = boundSql
                .getParameterMappings();
        // sql语句中多个空格都用一个空格代替
        String sql = boundSql.getSql().replaceAll("[\\s]+", " ");
        if (!CollectionUtils.isEmpty(parameterMappings) && parameterObject != null) {
            // 获取类型处理器注册器，类型处理器的功能是进行java类型和数据库类型的转换　　　　　　　
            // 如果根据parameterObject.getClass(）可以找到对应的类型，则替换
            TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
            if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
                sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(parameterObject)));

            } else {
                //MetaObject主要是封装了originalObject对象，
                // 提供了get和set的方法用于获取和设置originalObject的属性值,
                // 主要支持对JavaBean、Collection、Map三种类型对象的操作
                MetaObject metaObject = configuration.newMetaObject(parameterObject);
                for (ParameterMapping parameterMapping : parameterMappings) {
                    String propertyName = parameterMapping.getProperty();
                    if (metaObject.hasGetter(propertyName)) {
                        Object obj = metaObject.getValue(propertyName);
                        sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(obj)));
                    } else if (boundSql.hasAdditionalParameter(propertyName)) {
                        // 该分支是动态sql
                        Object obj = boundSql.getAdditionalParameter(propertyName);
                        sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(obj)));

                    } else {
                        //打印出缺失，提醒该参数缺失并防止错位
                        sql = sql.replaceFirst("\\?", "缺失");
                    }
                }
            }
        }
        return sql;
    }

}

效果图