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执行时间记录拦截器
*/
@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语句，去除换行符，替换参数
sql = formatSql(sql, parameterObject, parameterMappingList); */
StringBuilder build=
new StringBuilder("<== Preparing: "
);
build.append("\n"
);
build.append(boundSql.getSql());
build.append("\n"
);
build.append("MYBATIS-SQL执行耗时["
);
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) {
// 输入sql字符串空判断
if (sql ==
null || sql.length() == 0
) {
return ""
;
}
// 美化sql
sql =
beautifySql(sql);
// 不传参数的场景，直接把Sql美化一下返回出去
if (parameterObject ==
null || parameterMappingList ==
null || parameterMappingList.size() == 0
) {
return sql;
}
// 定义一个没有替换过占位符的sql，用于出异常时返回
String sqlWithoutReplacePlaceholder =
sql;
try {
if (parameterMappingList !=
null) {
Class<?> parameterObjectClass =
parameterObject.getClass();
// 如果参数是StrictMap且Value类型为Collection，获取key="list"的属性，这里主要是为了处理<foreach>循环时传入List这种参数的占位符替换
// 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)) {
// 如果参数是Map则直接强转，通过map.get(key)方法获取真正的属性值
// 这里主要是为了处理<insert>、<delete>、<update>、<select>时传入parameterType为map的场景
Map<?, ?> paramMap = (Map<?, ?>
) parameterObject;
sql =
handleMapParameter(sql, paramMap, parameterMappingList);
} else {
// 通用场景，比如传的是一个自定义的对象或者八种基本数据类型之一或者String
sql =
handleCommonParameter(sql, parameterMappingList, parameterObjectClass, parameterObject);
}
}
} catch (Exception e) {
// 占位符替换过程中出现异常，则返回没有替换过占位符但是格式美化过的sql，这样至少保证sql语句比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;
}
/**
* 处理参数为List的场景
*/
private String handleListParameter(String sql, Collection<?>
col) {
if (col !=
null && col.size() != 0
) {
for (Object obj : col) {
String value =
null;
Class<?> objClass =
obj.getClass();
// 只处理基本数据类型、基本数据类型的包装类、String这三种
// 如果是复合类型也是可以的，不过复杂点且这种场景较少，写代码的时候要判断一下要拿到的是复合类型中的哪个属性
if (isPrimitiveOrPrimitiveWrapper(objClass)) {
value =
obj.toString();
} else if (objClass.isAssignableFrom(String.
class)) {
value = "\"" + obj.toString() + "\""
;
}
sql = sql.replaceFirst("\\?"
, value);
}
}
return sql;
}
/**
* 处理参数为Map的场景
*/
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;
}
/**
* 处理通用的场景
*/
private String handleCommonParameter(String sql, List<ParameterMapping> parameterMappingList, Class<?>
parameterObjectClass,
Object parameterObject) throws Exception {
for (ParameterMapping parameterMapping : parameterMappingList) {
String propertyValue =
null;
// 基本数据类型或者基本数据类型的包装类，直接toString即可获取其真正的参数值，其余直接取paramterMapping中的property属性即可
if (isPrimitiveOrPrimitiveWrapper(parameterObjectClass)) {
propertyValue =
parameterObject.toString();
} else {
String propertyName =
parameterMapping.getProperty();
Field field =
parameterObjectClass.getDeclaredField(propertyName);
// 要获取Field中的属性值，这里必须将私有属性的accessible设置为true
field.setAccessible(
true);
propertyValue =
String.valueOf(field.get(parameterObject));
if (parameterMapping.getJavaType().isAssignableFrom(String.
class)) {
propertyValue = "\"" + propertyValue + "\""
;
}
}
sql = sql.replaceFirst("\\?"
, propertyValue);
}
return sql;
}
/**
* 是否基本数据类型或者基本数据类型的包装类
*/
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的内部类StrictMap
*/
private boolean isStrictMap(Class<?>
parameterObjectClass) {
return parameterObjectClass.isAssignableFrom(StrictMap.
class);
}
/**
* 是否List的实现类
*/
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的实现类
*/
private boolean isMap(Class<?>
parameterObjectClass) {
Class<?>[] interfaceClasses =
parameterObjectClass.getInterfaces();
for (Class<?>
interfaceClass : interfaceClasses) {
if (interfaceClass.isAssignableFrom(Map.
class)) {
return true;
}
}
return false;
}
}
控制台输出:
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执行耗时[9ms]
mybatis拦截器实现查看sql执行效率
标签：util spell 字符串 classes system desc false 通用 prime
