mybatis输出SQL格式化方式

mybatis输出SQL格式化方式

目录mybatis输出SQL格式化自定义拦截器配置拦截器配置日志级别mybatis sql语句格式化 trim prefix suffix1. select语句2. insert语句3.update语句

mybatis输出SQL格式化

通过第三方日志工具可以控制日志级别的输出，但是我们发现mybatis输出的SQL不是那么的完整，我们SQL里的参数值并没有打印出来，下面我就来讲讲怎么样对mybatis的输出sql格式化。

首先我这个案例是基于Spring boot 来开发的，所以配置和传统的xml配置有所区别，spring boot大大简化了一些配置，它把配置放到java代码，我们只需要使用注解就可替代一些以前xml的配置。

自定义拦截器

import java.io.PrintStream;

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;

import org.apache.commons.collections.CollectionUtils;

import org.apache.ibatis.mapping.BoundSql;

import org.apache.ibatis.mapping.MappedStatement;

import org.apache.ibatis.mappfsrFmGing.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.reflection.MetaObject;

import org.apache.ibatis.session.Configuration;

import org.apache.ibatis.type.TypeHandlerRegistry;

import org.springframework.stereotype.Component;

/**

* 自定义mybatis拦截器,格式化SQL输出,

*

* @author zengsong

* @version 1.0

* @description 只对查询和更新语句做了格式化，其它语句需要手动添加

* @date 2019/5/30 10:17

**/

@Intercepts({@org.apache.ibatis.plugin.Signature(type=org.apache.ibatis.executor.Executor.class, method="update", args={MappedStatement.class, Object.class}), @org.apache.ibatis.plugin.Signature(type=org.apache.ibatis.executor.Executor.class, method="query", args={MappedStatement.class, Object.class, org.apache.ibatis.session.RowBounds.class, org.apache.ibatis.session.ResultHandler.class})})

@Component

public class MybatisResultInterceptor

implements Interceptor

{

public Object intercept(Invocation invocation)

throws Throwable

{

try

{

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();

String sql = getSql(configuration, boundSql, sqlId);

System.out.println(sql);

}

catch (Exception localException) {}

return invocation.proceed();

}

public static 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();

}

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(2, 2, Locale.CHINA);

value = "'" + formatter.format(new Date()) + "'";http://

}

else if (obj != null)

{

http:// value = obj.toString();

}

else

{

value = "";

}

return value;

}

public static String showSql(Configuration configuration, BoundSql boundSql)

{

Object parameterObject = boundSql.getParameterObject();

List parameterMappings = boundSql.getParameterMappings();

String sql = boundSql.getSql().replaceAll("[\\s]+", " ");

MetaObject metaObject;

if ((CollectionUtils.isNotEmpty(parameterMappings)) && (parameterObject != null))

{

TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();

if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass()))

{

sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(parameterObject)));

}

else

{

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))

{

Object obj = boundSql.getAdditionalParameter(propertyName);

sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(obj)));

}

else

{

sql = sql.replaceFirst("\\?", "缺失");

}

}

}

}

return sql;

}

public Object plugin(Object target)

{

return Plugin.wrap(target, this);

}

public void setProperties(Properties properties) {}

}

配置拦截器

import com.sengled.cloud.data.platform.dao.mybatis.MybatisResultInterceptor;

import java.util.Properties;

import javax.annotation.Resource;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

/**

* 自定义mybatis拦截器

*

* @author zengsong

* @version 1.0

* @description

* @date 2019/5/30 10:17

**/

@Configuration

public class MybatisInterceptorConfig

{

@Resource

private MybatisResultInterceptor mybatisResultInterceptor;

@Bean

public String myInterceptor()

{

Properties properties = new Properties();

this.mybatisResultInterceptor.setProperties(properties);

return "interceptor";

}

}

配置日志级别

mybatis sql语句格式化 trim prefix suffix

标题SQL语句格式化

trim标记：是格式化sql的标记

prefix：前缀

suffix：后缀

prefixOverrides：指定去除多余的前缀内容

suffixOverrides：指定去除多余的后缀内容

1. select语句

select * from tb_user

AND name = #{name}

AND gender= #{gender}

执行结果为：

select * from tb_user where and name = #{name} andgender = #{gender}

2. insert语句

insert into tb_user

id,

name,

gender,

#{id,jdbcType=BIGINT},

#{name,jdbcType=VARCHAR},

#{gender,jdbcType=BIGINT},

执行结果为：

insert into tb_user (id,name,gender) values(1,“张三”,20)

3.update语句

update tb_user

　　　　 name = #{name} ,

　　　　 gender = #{gender} ,

执行结果为：

update tb_user set name = “张三”，gender = 30 where id = 1

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