mybatis Sql打印两种方式

package com.sowell.sjzt.util; import org.apache.commons.collections.CollectionUtils; import org.apache.ibatis.cache.CacheKey; 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.*; 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 java.text.DateFormat; import java.util.Date; import java.util.List; import java.util.Locale; import java.util.Properties; import java.util.regex.Matcher; @Intercepts(value = { @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, CacheKey.class, BoundSql.class}), @Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class})}) public class MybatisInterceptor implements Interceptor { @Override public Object intercept(Invocation invocation) throws Throwable { try{ MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0]; // 获取xml中的一个select/update/insert/delete节点，主要描述的是一条SQL语句 Object parameter = null; if (invocation.getArgs().length > 1) { parameter = invocation.getArgs()[1]; System.out.println("parameter = " + parameter); } String sqlId = mappedStatement.getId(); // 获取到节点的id,即sql语句的id BoundSql boundSql = mappedStatement.getBoundSql(parameter); // BoundSql就是封装myBatis最终产生的sql类 Configuration configuration = mappedStatement.getConfiguration(); // 获取节点的配置 String sql = getSql(configuration, boundSql, sqlId); // 获取到最终的sql语句 System.err.println("sql = " + sql); //log.debug(sql); }catch(Exception e){ // log.error(e.getMessage(), e); } return invocation.proceed(); // 执行完上面的任务后，不改变原有的sql执行过程 } 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(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(); // 获取参数 List<ParameterMapping> parameterMappings = boundSql .getParameterMappings(); String sql = boundSql.getSql().replaceAll("[\\s]+", " "); // sql语句中多个空格都用一个空格代替 if (CollectionUtils.isNotEmpty(parameterMappings) && parameterObject != null) { TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry(); // 获取类型处理器注册器，类型处理器的功能是进行java类型和数据库类型的转换<br>　　　　　　　// 如果根据parameterObject.getClass(）可以找到对应的类型，则替换 if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) { sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(parameterObject))); } else { MetaObject metaObject = configuration.newMetaObject(parameterObject);// MetaObject主要是封装了originalObject对象，提供了get和set的方法用于获取和设置originalObject的属性值,主要支持对JavaBean、Collection、Map三种类型对象的操作 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); // 该分支是动态sql sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(obj))); }else{sql=sql.replaceFirst("\\?","缺失");}//打印出缺失，提醒该参数缺失并防止错位 } } } return sql; } @Override public Object plugin(Object target) { return Plugin.wrap(target, this); } @Override public void setProperties(Properties properties) { } }