<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<!-- 配置返回类型的别名 -->
<property name="typeAliasesPackage" value="com.tongj.stumgr.domain"></property>
<!-- 映射文件 -->
<property name="mapperLocations"
value="classpath:com/tongj/stumgr/domain/*Mapper.xml"></property>
<property name="configurationProperties">
<value>
<!--开启二级缓存，默认就是true就是开启 -->
cacheEnabled=true
</value>
</property>
<!-- 重点是这里，添加plugins!!! -->
<property name="plugins">
<array>
<bean id="sqlStatementInterceptor" class="com.tongj.stumgr.interceptor.SqlStatementInterceptor" />
</array>
</property>
</bean>xml配置plugin
java代码
package com.tongj.stumgr.interceptor;
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;
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.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;
import org.apache.log4j.Logger;
import org.springframework.util.CollectionUtils;
/**
* 数据库操作性能拦截器,记录耗时
*/
@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 SqlStatementInterceptor implements Interceptor{
private static Logger logger = Logger.getLogger(SqlStatementInterceptor.class);
private Properties properties;
@Override
public Object intercept(Invocation invocation) throws Throwable
{
Object returnValue;
long start = System.currentTimeMillis();
returnValue = invocation.proceed();
long end = System.currentTimeMillis();
long time = end - start;
try {
final Object[] args = invocation.getArgs();
//获取原始的ms
MappedStatement ms = (MappedStatement) args[0];
Object parameter = null;
//获取参数，if语句成立，表示sql语句有参数，参数格式是map形式
if (invocation.getArgs().length > 1) {
parameter = invocation.getArgs()[1];
}
String sqlId = ms.getId();// 获取到节点的id,即sql语句的id
BoundSql boundSql = ms.getBoundSql(parameter); // BoundSql就是封装myBatis最终产生的sql类
Configuration configuration = ms.getConfiguration(); // 获取节点的配置
String sql = getSql(configuration, boundSql, sqlId,time); // 获取到最终的sql语句
logger.error(sql);
logger.warn(sql);
System.out.println(sql);
} catch (Exception e) {
logger.error("拦截sql处理出差"+e.getMessage());
e.printStackTrace();
}
return returnValue;
}
// 封装了一下sql语句，使得结果返回完整xml路径下的sql语句节点id + sql语句
public static String getSql(Configuration configuration, BoundSql boundSql,String sqlId,long time) {
String sql = showSql(configuration, boundSql);
StringBuilder str = new StringBuilder(100);
str.append("\n\n============================begin================================\n\n");
str.append(sqlId);
str.append(":耗时【");
str.append(time);
str.append("】毫秒");
str.append(sql);
str.append("\n\n============================end================================\n\n");
return str.toString();
}
/*<br> *如果参数是String，则添加单引号， 如果是日期，则转换为时间格式器并加单引号； 对参数是null和不是null的情况作了处理<br> */
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;
}
// 进行？的替换
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.isEmpty(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 arg0)
{
return Plugin.wrap(arg0, this);
}
@Override
public void setProperties(Properties arg0)
{
this.properties = arg0;
}
}log4j
#ERROR > WARN > INFO > DEBUG
log4j.debug=true
#log4j.rootLogger=DEBUG,dbg,inf,wrn,err
log4j.rootLogger=DEBUG,inf,wrn,err
#sql
log4j.appender.sql = org.apache.log4j.DailyRollingFileAppender
log4j.appender.dbg.File = D://logs_projects/mybatis-demo/sql.log
log4j.appender.dbg.DatePattern='.'yyyy-MM-dd'.log'
log4j.appender.dbg.Append = true
log4j.appender.dbg.Threshold = WARAN
log4j.appender.dbg.layout = org.apache.log4j.PatternLayout
log4j.appender.dbg.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} %c(%F\:%L) %m%n效果图：控制台打印出的sql可直接copy运行
控制台效果：
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