java利用mybatis拦截器统计sql执行时间示例

可以根据执行时间打印sql语句，打印的sql语句是带参数的，可以拷贝到查询分析器什么的直接运行

代码如下:

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));
     }
    }
   }
  }
  return sql;
 }

public Object plugin(Object target) {
  return Plugin.wrap(target, this);
 }

public void setProperties(Properties properties0) {
  this.properties = properties0;
 }
}