利用Mybatis拦截器统计sql执行时间及打印会直接运行的sql语句

package mybatis; 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; @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 MybatisInterceptor implements Interceptor {     private Properties properties;     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);            System.err.println(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(":");        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));                    }  else{                        Map map = (Map)metaObject ;                         sql = sql.replaceFirst("\\?", getParameterValue(map.get(propertyName)));}                  }            }        }        return sql;    }     public Object plugin(Object target) {        return Plugin.wrap(target, this);    }     public void setProperties(Properties properties0) {        this.properties = properties0;    }}