Mybatis日志打印Sql

配置mybatis-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
    PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>
    
 
    <plugins>                                                
         <plugin interceptor="MybatisInterceptor"></plugin>  
    </plugins>
</configuration>

新建JAVA类 MybatisInterceptor 

import java.text.DateFormat;  
import java.util.Date;  
import java.util.List;  
import java.util.Locale;  
import java.util.Properties;  
   
import org.apache.ibatis.executor.Executor;  
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.MetaObject;  
import org.apache.ibatis.session.Configuration;  
import org.apache.ibatis.session.ResultHandler;  
import org.apache.ibatis.session.RowBounds;  
import org.apache.ibatis.type.TypeHandlerRegistry;  
   
@Intercepts({  
        @Signature(type = Executor.class, method = "update", args = { MappedStatement.class, Object.class }),  
        @Signature(type = Executor.class, method = "query", args = { MappedStatement.class, Object.class,  
                RowBounds.class, ResultHandler.class }) })  
public class MybatisInterceptor implements Interceptor {  
   
    private Properties properties;  
   
    public Object intercept(Invocation invocation) throws Throwable {  
        MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];  
        Object parameter = null;  
        if (invocation.getArgs().length > 1) {  
            parameter = invocation.getArgs()[1];  
        }  
        String sqlId = mappedStatement.getId();  
        BoundSql boundSql = mappedStatement.getBoundSql(parameter);  
        Configuration configuration = mappedStatement.getConfiguration();  
        Object returnValue = null;  
        long start = System.currentTimeMillis();  
        returnValue = invocation.proceed();  
        long end = System.currentTimeMillis();  
        long time = (end - start);  
        if (time > 1) {  
            String sql = getSql(configuration, boundSql, sqlId, time);  
            System.err.println(sql);  
        }  
        return returnValue;  
    }  
   
    public static String getSql(Configuration configuration, BoundSql boundSql, String sqlId, long time) {  
        String sql = showSql(configuration, boundSql);  
        StringBuilder str = new StringBuilder(100);  
        str.append(sqlId);  
        str.append(":");  
        str.append(sql);  
        str.append(":");  
        str.append(time);  
        str.append("ms");  
        return str.toString();  
    }  
   
    private static 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;  
    }  
   
    public static String showSql(Configuration configuration, BoundSql boundSql) {  
        Object parameterObject = boundSql.getParameterObject();  
        List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();  
        String sql = boundSql.getSql().replaceAll("[\s]+", " ");  
        if (parameterMappings.size() > 0 && parameterObject != null) {  
            TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();  
            if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {  
                sql = sql.replaceFirst("\?", getParameterValue(parameterObject));  
   
            } else {  
                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("\?", getParameterValue(obj));  
                    } else if (boundSql.hasAdditionalParameter(propertyName)) {  
                        Object obj = boundSql.getAdditionalParameter(propertyName);  
                        sql = sql.replaceFirst("\?", getParameterValue(obj));  
                    }  
                }  
            }  
        }  
        return sql;  
    }  
   
    public Object plugin(Object target) {  
        return Plugin.wrap(target, this);  
    }  
   
    public void setProperties(Properties properties0) {  
        this.properties = properties0;  
    }  
}