mybaits 下控制台打印SQL输入语句

MyBatis SQL性能拦截器

最新推荐文章于 2025-10-31 14:35:13 发布

原创最新推荐文章于 2025-10-31 14:35:13 发布 · 510 阅读

0 ·

CC 4.0 BY-SA版权

本文介绍了一个用于MyBatis框架的SQL性能拦截器实现，该拦截器能够记录SQL执行时间和参数，帮助开发者监控和优化数据库操作效率。

1，准备拦截器类,无需改动

/**
* @ClassName: PerformanceInterceptor
* @Description: 拦截SQL 控制器输出
* @author yunlin.liu
* @date 2016-5-25 下午2:38:05
*
*/
@Intercepts({
@Signature(type = Executor.class, method = "query", args = { MappedStatement.class, Object.class,
RowBounds.class, ResultHandler.class }),
@Signature(type = Executor.class, method = "update", args = { MappedStatement.class, Object.class }) })
public class PerformanceInterceptor implements Interceptor {
private Logger logger = Logger.getLogger(PerformanceInterceptor.class);
private static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";

@Override
public Object intercept(Invocation invocation) throws Throwable {
MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];
Object parameterObject = null;
long start = System.currentTimeMillis();
Object result = invocation.proceed();
long end = System.currentTimeMillis();
long timing = end - start;
if (invocation.getArgs().length > 1) {
parameterObject = invocation.getArgs()[1];
}
String statementId = mappedStatement.getId();
BoundSql boundSql = mappedStatement.getBoundSql(parameterObject);
Configuration configuration = mappedStatement.getConfiguration();
String sql = getSql(boundSql, parameterObject, configuration);
logger.info("耗时：" + timing + " ms" + " - id:" + statementId + " - SQL:" + sql);
return result;
}

@Override
public Object plugin(Object target) {
if (target instanceof Executor) {
return Plugin.wrap(target, this);
}
return target;
}

@Override
public void setProperties(Properties properties) {
}

private String getSql(BoundSql boundSql, Object parameterObject, Configuration configuration) {
String sql = boundSql.getSql().replaceAll("[\\s]+", " ");
List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
if (parameterMappings != null) {
for (int i = 0; i < parameterMappings.size(); i++) {
ParameterMapping parameterMapping = parameterMappings.get(i);
if (parameterMapping.getMode() != ParameterMode.OUT) {
Object value;
String propertyName = parameterMapping.getProperty();
if (boundSql.hasAdditionalParameter(propertyName)) {
value = boundSql.getAdditionalParameter(propertyName);
} else if (parameterObject == null) {
value = null;
} else if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
value = parameterObject;
} else {
MetaObject metaObject = configuration.newMetaObject(parameterObject);
value = metaObject.getValue(propertyName);
}
sql = replacePlaceholder(sql, value);
}
}
}
return sql;
}

private String replacePlaceholder(String sql, Object propertyValue) {
String result;
if (propertyValue != null) {
if (propertyValue instanceof String) {
result = "'" + propertyValue + "'";
} else if (propertyValue instanceof Date) {
result = "'" + DateFormatUtils.format((Date) propertyValue, DATE_FORMAT) + "'";
} else {
result = propertyValue.toString();
}
} else {
result = "null";
}
return sql.replaceFirst("\\?", result);
}
}