Mybatis查看完整SQL及执行性能

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能不能直接把？参数拼接完了以后SQL给我？

在开发的过程中，数据不对的时候，我们会去日志中找到具体的sql 执行语句
但是往往是这样的

2017-08-30-14-35-23 [DEBUG] [main] [selectRecommendGoodsForStoreApp_132] - ==>  Preparing: SELECT sk.SKU_ID AS skuId, sk.SKU_IMG_PATH AS skuImgPath, sk.SKU_NAME AS skuName, sk.SKU_NORMS AS skuNorms, sk.QUALITY_PERIOD AS qualityPeriod, sk.SKU_PACKAGE_NUM_1 as skuPackageNum1, sk.SKU_PACKAGE_NUM_2 as skuPackageNum2, sk.SKU_PACKAGE_NUM_3 as skuPackageNum3, sk.SKU_PACKAGE_UNIT_1 as skuPackageUnit1, sk.SKU_PACKAGE_UNIT_2 as skuPackageUnit2, sk.SKU_PACKAGE_UNIT_3 as skuPackageUnit3, sh.SELL_PRICE AS sellPrice, sh.USER_ID as supplierId, sh.SHELF_ID as shelfId, sh.WAREHOUSE_ID as warehouseId, sh.PROMOTION_PRICE as promotionPrice FROM ess_sku_recommend AS re LEFT JOIN ess_sku_custom as sk ON sk.SKU_ID=re.SKU_ID LEFT JOIN ess_shelf_info as sh ON sh.SKU_ID = sk.SKU_ID WHERE 1=1 and sh.WAREHOUSE_ID in ( ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? ) group by sk.sku_id

2017-08-30-14-35-23 [DEBUG] [main] [selectRecommendGoodsForStoreApp_132] - ==> Parameters: 147(String), a07bfd2e052b4513b308e969e4cc6eea(String), W10000001(String), W10000002(String), W10000003(String), W10000006(String), W10000007(String), W11708261601220001(String), W11708281000390002(String), W11708281001220003(String), W11708281001540004(String), W11708281506390001(String), Wsdfsdf(String)

这里写图片描述

看到那一堆？？？？？？了吗？
上面的代码是带有？的预执行 sql 语句，现在好了，你看看第二个代码块里的具体参数吧，你不觉得一个一个的去替换然后查询，然后看结果。。。。。这个过程很反人类吗？

你只需要这段代码

下面这个是一个 mybatis plugin，放到你的项目当中，然后在 mybatis 的配置文件中加上这个 plugin。
至于如何加plugin ,这个根据 mybatis 版本不同，以及具体的配置规则不一样
请大家自行适配吧。

这个功能加上去之后
1.可以打印出最后执行的SQL（？已经给你替换成具体的参数了）
2.记录这个SQL执行的时间。这一点对于性能调优还是很有帮助了

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;import org.slf4j.Logger;import org.slf4j.LoggerFactory;@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 SqlTimeInterceptor implements Interceptor {    @SuppressWarnings("unused")    private Properties properties;    private static Logger log = LoggerFactory.getLogger(SqlTimeInterceptor.class);    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);            log.info(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(": 执行耗时");        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;    }}

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