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這篇文章主要講解了“mybatis輸出SQL格式化的方法是什么”,文中的講解內(nèi)容簡(jiǎn)單清晰,易于學(xué)習(xí)與理解,下面請(qǐng)大家跟著小編的思路慢慢深入,一起來(lái)研究和學(xué)習(xí)“mybatis輸出SQL格式化的方法是什么”吧!
通過(guò)第三方日志工具可以控制日志級(jí)別的輸出,但是我們發(fā)現(xiàn)mybatis輸出的SQL不是那么的完整,我們SQL里的參數(shù)值并沒(méi)有打印出來(lái),下面我就來(lái)講講怎么樣對(duì)mybatis的輸出sql格式化。
首先我這個(gè)案例是基于Spring boot 來(lái)開(kāi)發(fā)的,所以配置和傳統(tǒng)的xml配置有所區(qū)別,spring boot大大簡(jiǎn)化了一些配置,它把配置放到j(luò)ava代碼,我們只需要使用注解就可替代一些以前xml的配置。
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.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.reflection.MetaObject; import org.apache.ibatis.session.Configuration; import org.apache.ibatis.type.TypeHandlerRegistry; import org.springframework.stereotype.Component; /** * 自定義mybatis攔截器,格式化SQL輸出, * * @author zengsong * @version 1.0 * @description 只對(duì)查詢(xún)和更新語(yǔ)句做了格式化,其它語(yǔ)句需要手動(dòng)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()) + "'"; } 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]+", " "); 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) {} }
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; /** * 自定義mybatis攔截器 * * @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"; } }
<logger name="com.apache.ibatis" level="TRACE"/> <logger name="java.sql.Connection" level="DEBUG"/> <logger name="java.sql.Statement" level="DEBUG"/> <logger name="java.sql.PreparedStatement" level="DEBUG"/> <root level="INFO"> <appender-ref ref="STDOUT" /> <appender-ref ref="FILE" /> </root>
標(biāo)題SQL語(yǔ)句格式化
trim標(biāo)記
:是格式化sql的標(biāo)記
prefix
:前綴
suffix
:后綴
prefixOverrides
:指定去除多余的前綴內(nèi)容
suffixOverrides
:指定去除多余的后綴內(nèi)容
<select id="" parameterType="" resultType=""> select * from tb_user <trim perfis="WHERE" prefixOverrides = "AND | OR"> <if test="name != null"> AND name = #{name}</if> <if test="gender != null"> AND gender= #{gender}</if> </trim> </select>
執(zhí)行結(jié)果為:
select * from tb_user where and name = #{name} andgender = #{gender}
<insert id="" parameterType=""> insert into tb_user <trim prefix="(" suffix=")" suffixOverrides=","> <if test="id != null"> id, </if> <if test="name!= null"> name, </if> <if test="gender!= null"> gender, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides=","> <if test="id != null"> #{id,jdbcType=BIGINT}, </if> <if test="name!= null"> #{name,jdbcType=VARCHAR}, </if> <if test="gender!= null"> #{gender,jdbcType=BIGINT}, </if> </trim> </insert>
執(zhí)行結(jié)果為:
insert into tb_user (id,name,gender) values(1,“張三”,20)
<update id=""> update tb_user <trim prefix="set" suffix=" where id = #{id}" suffixOverrides="," > <if test="name != null"> name = #{name} , </if> <if test="gender != null"> gender = #{gender} ,</if> </trim> </update>
執(zhí)行結(jié)果為:
update tb_user set name = “張三”,gender = 30 where id = 1
感謝各位的閱讀,以上就是“mybatis輸出SQL格式化的方法是什么”的內(nèi)容了,經(jīng)過(guò)本文的學(xué)習(xí)后,相信大家對(duì)mybatis輸出SQL格式化的方法是什么這一問(wèn)題有了更深刻的體會(huì),具體使用情況還需要大家實(shí)踐驗(yàn)證。這里是億速云,小編將為大家推送更多相關(guān)知識(shí)點(diǎn)的文章,歡迎關(guān)注!
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