mybatis攔截器實現查看sql執行效率
阿新 • • 發佈：2018-02-01
nth 內部 設置 work check sel nts mage view
package cc.zeelan.common.utils; import java.lang.reflect.Field; import java.sql.Statement; import java.util.Collection; import java.util.List; import java.util.Map; import java.util.Properties; import org.apache.ibatis.executor.statement.StatementHandler; import org.apache.ibatis.logging.commons.JakartaCommonsLoggingImpl;import org.apache.ibatis.mapping.BoundSql; 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.session.ResultHandler; import org.apache.ibatis.session.defaults.DefaultSqlSession.StrictMap; /** * Sql執行時間記錄攔截器 */ @Intercepts({@Signature(type = StatementHandler.class, method = "query", args = {Statement.class, ResultHandler.class}), @Signature(type = StatementHandler.class, method = "update", args = {Statement.class}), @Signature(type = StatementHandler.class, method = "batch", args = { Statement.class })}) public class SqlCostInterceptor implements Interceptor { private static final JakartaCommonsLoggingImpl logger=new JakartaCommonsLoggingImpl("SqlCostInterceptor"); @Override public Object intercept(Invocation invocation) throws Throwable { Object target = invocation.getTarget(); long startTime = System.currentTimeMillis(); StatementHandler statementHandler = (StatementHandler)target; BoundSql boundSql = statementHandler.getBoundSql(); try { return invocation.proceed(); } finally { /* Object target = invocation.getTarget(); StatementHandler statementHandler = (StatementHandler)target; BoundSql boundSql = statementHandler.getBoundSql(); String sql = boundSql.getSql(); Object parameterObject = boundSql.getParameterObject(); List<ParameterMapping> parameterMappingList = boundSql.getParameterMappings(); // 格式化Sql語句，去除換行符，替換參數 sql = formatSql(sql, parameterObject, parameterMappingList); */ StringBuilder build=new StringBuilder("<== Preparing: "); build.append("\n"); build.append(boundSql.getSql()); build.append("\n"); build.append("MYBATIS-SQL執行耗時["); build.append((System.currentTimeMillis()-startTime)); build.append("ms]"); logger.debug(build.toString()); } } @Override public Object plugin(Object target) { return Plugin.wrap(target, this); } @Override public void setProperties(Properties properties) { } @SuppressWarnings("unused") private String formatSql(String sql, Object parameterObject, List<ParameterMapping> parameterMappingList) { // 輸入sql字符串空判斷 if (sql == null || sql.length() == 0) { return ""; } // 美化sql sql = beautifySql(sql); // 不傳參數的場景，直接把Sql美化一下返回出去 if (parameterObject == null || parameterMappingList == null || parameterMappingList.size() == 0) { return sql; } // 定義一個沒有替換過占位符的sql，用於出異常時返回 String sqlWithoutReplacePlaceholder = sql; try { if (parameterMappingList != null) { Class<?> parameterObjectClass = parameterObject.getClass(); // 如果參數是StrictMap且Value類型為Collection，獲取key="list"的屬性，這裏主要是為了處理<foreach>循環時傳入List這種參數的占位符替換 // 例如select * from xxx where id in <foreach collection="list">...</foreach> if (isStrictMap(parameterObjectClass)) { @SuppressWarnings("unchecked") StrictMap<Collection<?>> strictMap = (StrictMap<Collection<?>>)parameterObject; if (isList(strictMap.get("list").getClass())) { sql = handleListParameter(sql, strictMap.get("list")); } } else if (isMap(parameterObjectClass)) { // 如果參數是Map則直接強轉，通過map.get(key)方法獲取真正的屬性值 // 這裏主要是為了處理<insert>、<delete>、<update>、<select>時傳入parameterType為map的場景 Map<?, ?> paramMap = (Map<?, ?>) parameterObject; sql = handleMapParameter(sql, paramMap, parameterMappingList); } else { // 通用場景，比如傳的是一個自定義的對象或者八種基本數據類型之一或者String sql = handleCommonParameter(sql, parameterMappingList, parameterObjectClass, parameterObject); } } } catch (Exception e) { // 占位符替換過程中出現異常，則返回沒有替換過占位符但是格式美化過的sql，這樣至少保證sql語句比BoundSql中的sql更好看 return sqlWithoutReplacePlaceholder; } return sql; } /** * 美化Sql */ private String beautifySql(String sql) { sql = sql.replace("\n", "").replace("\t", "").replace(" ", " ").replace("( ", "(").replace(" )", ")").replace(" ,", ","); return sql; } /** * 處理參數為List的場景 */ private String handleListParameter(String sql, Collection<?> col) { if (col != null && col.size() != 0) { for (Object obj : col) { String value = null; Class<?> objClass = obj.getClass(); // 只處理基本數據類型、基本數據類型的包裝類、String這三種 // 如果是復合類型也是可以的，不過復雜點且這種場景較少，寫代碼的時候要判斷一下要拿到的是復合類型中的哪個屬性 if (isPrimitiveOrPrimitiveWrapper(objClass)) { value = obj.toString(); } else if (objClass.isAssignableFrom(String.class)) { value = "\"" + obj.toString() + "\""; } sql = sql.replaceFirst("\\?", value); } } return sql; } /** * 處理參數為Map的場景 */ private String handleMapParameter(String sql, Map<?, ?> paramMap, List<ParameterMapping> parameterMappingList) { for (ParameterMapping parameterMapping : parameterMappingList) { Object propertyName = parameterMapping.getProperty(); Object propertyValue = paramMap.get(propertyName); if (propertyValue != null) { if (propertyValue.getClass().isAssignableFrom(String.class)) { propertyValue = "\"" + propertyValue + "\""; } sql = sql.replaceFirst("\\?", propertyValue.toString()); } } return sql; } /** * 處理通用的場景 */ private String handleCommonParameter(String sql, List<ParameterMapping> parameterMappingList, Class<?> parameterObjectClass, Object parameterObject) throws Exception { for (ParameterMapping parameterMapping : parameterMappingList) { String propertyValue = null; // 基本數據類型或者基本數據類型的包裝類，直接toString即可獲取其真正的參數值，其余直接取paramterMapping中的property屬性即可 if (isPrimitiveOrPrimitiveWrapper(parameterObjectClass)) { propertyValue = parameterObject.toString(); } else { String propertyName = parameterMapping.getProperty(); Field field = parameterObjectClass.getDeclaredField(propertyName); // 要獲取Field中的屬性值，這裏必須將私有屬性的accessible設置為true field.setAccessible(true); propertyValue = String.valueOf(field.get(parameterObject)); if (parameterMapping.getJavaType().isAssignableFrom(String.class)) { propertyValue = "\"" + propertyValue + "\""; } } sql = sql.replaceFirst("\\?", propertyValue); } return sql; } /** * 是否基本數據類型或者基本數據類型的包裝類 */ private boolean isPrimitiveOrPrimitiveWrapper(Class<?> parameterObjectClass) { return parameterObjectClass.isPrimitive() || (parameterObjectClass.isAssignableFrom(Byte.class) || parameterObjectClass.isAssignableFrom(Short.class) || parameterObjectClass.isAssignableFrom(Integer.class) || parameterObjectClass.isAssignableFrom(Long.class) || parameterObjectClass.isAssignableFrom(Double.class) || parameterObjectClass.isAssignableFrom(Float.class) || parameterObjectClass.isAssignableFrom(Character.class) || parameterObjectClass.isAssignableFrom(Boolean.class)); } /** * 是否DefaultSqlSession的內部類StrictMap */ private boolean isStrictMap(Class<?> parameterObjectClass) { return parameterObjectClass.isAssignableFrom(StrictMap.class); } /** * 是否List的實現類 */ private boolean isList(Class<?> clazz) { Class<?>[] interfaceClasses = clazz.getInterfaces(); for (Class<?> interfaceClass : interfaceClasses) { if (interfaceClass.isAssignableFrom(List.class)) { return true; } } return false; } /** * 是否Map的實現類 */ private boolean isMap(Class<?> parameterObjectClass) { Class<?>[] interfaceClasses = parameterObjectClass.getInterfaces(); for (Class<?> interfaceClass : interfaceClasses) { if (interfaceClass.isAssignableFrom(Map.class)) { return true; } } return false; } }
控制臺輸出:
DEBUG [2018-02-01 12:16:27,439][] org.apache.ibatis.logging.commons.JakartaCommonsLoggingImpl:54 - ==> Preparing: SELECT product_info.product_id, product_info.bar_code, product_info.product_name, product_info.spell, product_info.location, product_info.category_id, product_info.product_descript, product_info.sell_count, product_info.product_stock, product_info.product_price, product_info.product_stats, product_info.brand_id, product_info.product_image_url, product_info.product_image_array, product_info.create_time, product_info.last_modify_time, product_info.product_unit, product_info.store_id, product_info.seller_stats, product_info.views, product_info.address_id, product_info.address_name, product_info.product_market_price, product_info.product_primecost_price, product_info.video_url, product_info.store_category_id, product_info.product_rec, product_info.seo_key_words, product_info.mobile_product_descript FROM PRODUCT_INFO WHERE product_info.product_id = ? DEBUG [2018-02-01 12:16:27,439][] org.springframework.jdbc.datasource.DataSourceUtils:340 - Returning JDBC Connection to DataSource DEBUG [2018-02-01 12:16:27,439][] org.apache.ibatis.logging.commons.JakartaCommonsLoggingImpl:54 - ==> Parameters: undefined(String) DEBUG [2018-02-01 12:16:27,447][] org.apache.ibatis.logging.commons.JakartaCommonsLoggingImpl:54 - <== Total: 0 DEBUG [2018-02-01 12:16:27,448][] org.apache.ibatis.logging.commons.JakartaCommonsLoggingImpl:54 - <== Preparing: SELECT product_info.product_id, product_info.bar_code, product_info.product_name, product_info.spell, product_info.location, product_info.category_id, product_info.product_descript, product_info.sell_count, product_info.product_stock, product_info.product_price, product_info.product_stats, product_info.brand_id, product_info.product_image_url, product_info.product_image_array, product_info.create_time, product_info.last_modify_time, product_info.product_unit, product_info.store_id, product_info.seller_stats, product_info.views, product_info.address_id, product_info.address_name, product_info.product_market_price, product_info.product_primecost_price, product_info.video_url, product_info.store_category_id, product_info.product_rec, product_info.seo_key_words, product_info.mobile_product_descript FROM PRODUCT_INFO WHERE product_info.product_id = ? MYBATIS-SQL執行耗時[9ms]
mybatis攔截器實現查看sql執行效率