标签：amd gets cat 自动 null util mil array jar
一、Spring的mvc配置以及使用
二、Spring的aop切面配置以及使用
三、Spring的aop切面在spring-mvc中失效的问题
四、通过aop切面来评估所有的dao在执行过程中的耗时
一、Spring的mvc配置以及使用
a、在pom.xml中引入spring的jar包。
b、在web.xml中配置，初始化dispatcherServlet，加载WebApplicationContext 容器。
<!-- 加载Springmvc得拦截器，初始化WebApplicationContext -->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping> <servlet-name>dispatcherServlet</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping>
c、在applicationContext-mvc.xml中配置视图解析器以及注解配置
<!-- SpringMVC: 配置自动扫描的包 和 ViewResolver -->
<context:component-scan base-package="com.dhpei"></context:component-scan>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
d、注解使用
@Controller
@RequestMapping("/user")
public class UserController {
@Resource
private UserDao userDao;
@Resource
private SystemParamDao systemParamDao;
@RequestMapping("/userList")
public String userList(Model model,HttpServletRequest request,HttpServletResponse response){
Map<String,String> query=new HashMap<String,String>();
List<UserEntity> userList=userDao.findUserList(query);
List<SystemParamRowMapper> sexList=systemParamDao.getSystemParamByCategoryCode("sex");
model.addAttribute("sexList", sexList);
model.addAttribute("userList", userList);
return "user/userList";
}
}
二、Spring的aop切面配置以及使用
a、在pom.xml中引入spring的aop相关jar包以及aspectjrt和aspectjweaver对应version的jar包。
<!-- 加载Spring的容器，初始化ApplicationContext -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
b、在web.xml中配置，加载ApplicationContext 容器。
<!-- 加载Spring的容器，初始化ApplicationContext -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
c、在applicationContext.xml中配置aop切面
<!-- Spring: 配置自动扫描的包-->
<context:component-scan base-package="com.dhpei"/>
<!-- Spring的aop切面管理 -->
<bean id="logAspect" class="com.dhpei.utils.aop.LogAspect"/>
<aop:config>
<aop:aspect id="aspect" ref="logAspect">
<!--第一个*指任意返回值，第二个*指knowledge下面的任意包，第三个*指impl下面的任意的类，第四个*指任意方法-->
<aop:pointcut id="logpointcut" expression="execution(* com.dhpei.knowledge.*.dao.impl.*.*(..))"/>
<aop:around method="traceMethod" pointcut-ref="logpointcut"/>
</aop:aspect>
</aop:config>
d、切面LogAspect
package com.dhpei.utils.aop;
import java.util.Arrays;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class LogAspect {
//切面方法
public Object traceMethod(final ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
Object returnVal = null;
final Logger log = getLog(proceedingJoinPoint);//获取当前执行的dao类的全称
final String methodName = proceedingJoinPoint.getSignature().getName();//获取当前dao类的执行方法
long start=System.currentTimeMillis();
try {
if (log.isInfoEnabled()) {
final Object[] args = proceedingJoinPoint.getArgs();
final String arguments;
if (args == null || args.length == 0) {
arguments = "";
} else {
arguments = Arrays.deepToString(args);
}
log.info("进入方法 [" + methodName + "];参数 [" + arguments + "]");
}
returnVal = proceedingJoinPoint.proceed();
return returnVal;
} finally {
if (log.isInfoEnabled()) {
log.info("离开方法 [" + methodName + "] ;返回值 [" + (returnVal != null ? returnVal.toString() : "null") + "].");
long end=System.currentTimeMillis();
log.info("执行方法耗时："+(end-start)+"毫秒。");
}
}
}
protected Logger getLog(final JoinPoint joinPoint) {
final Object target = joinPoint.getTarget();
if (target != null) {
return LoggerFactory.getLogger(target.getClass());
}
return LoggerFactory.getLogger(getClass());
}
}
三、Spring的aop切面在spring-mvc中失效的问题
将第一步和第二步的配置融合到一起使用，会发现aop切面执行不了。经过多方面调查原因，发现是由于Spring的mvc（WebApplicationContext 容器）在加载的过程中已经对dao对应的类做了扫描加载到容器中，当spring本身的（ApplicationContext 容器）再去扫描的时候发现已经加载到内存中，从而跳过了AOP的切面增强。
修改applicationContext-mvc.xml，添加excloud配置
<!-- SpringMVC: 配置自动扫描的包 和 ViewResolver -->
<context:component-scan base-package="com.dhpei">
<!-- 在Controller这一层加AOP增强 -->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Service"/>
</context:component-scan>
修改之后再启动工程，就可以正确的看到AOP的切面效果了。
四、通过aop切面来评估所有的dao在执行过程中的耗时
2016.11.15 12:50:40 DEBUG DispatcherServlet - DispatcherServlet with name ‘dispatcherServlet‘ processing GET request for [/knowledge/user/userList.action]
2016.11.15 12:50:40 DEBUG DefaultAnnotationHandlerMapping - Matching patterns for request [/user/userList.action] are [/user/userList.*]
2016.11.15 12:50:40 DEBUG DefaultAnnotationHandlerMapping - URI Template variables for request [/user/userList.action] are {}
2016.11.15 12:50:40 DEBUG DefaultAnnotationHandlerMapping - Mapping [/user/userList.action] to HandlerExecutionChain with handler [com.dhpei.knowledge.user.controller.UserController@10ad85e] and 1 interceptor
2016.11.15 12:50:40 DEBUG DispatcherServlet - Last-Modified value for [/knowledge/user/userList.action] is: -1
2016.11.15 12:50:40 DEBUG HandlerMethodInvoker - Invoking request handler method: public java.lang.String com.dhpei.knowledge.user.controller.UserController.userList(org.springframework.ui.Model,javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2016.11.15 12:50:40 DEBUG AnnotationTransactionAttributeSource - Adding transactional method ‘UserDaoImpl.findUserList‘ with attribute: PROPAGATION_NOT_SUPPORTED,ISOLATION_DEFAULT,readOnly; ‘‘
2016.11.15 12:50:40 DEBUG DefaultListableBeanFactory - Returning cached instance of singleton bean ‘txManager‘
2016.11.15 12:50:40 DEBUG DefaultListableBeanFactory - Returning cached instance of singleton bean ‘logAspect‘
2016.11.15 12:50:40 INFO UserDaoImpl - 进入方法 [findUserList];参数 [[{}]]
2016.11.15 12:50:40 DEBUG -UserDaoImpl- - execurte sql: select * from ts_user
2016.11.15 12:50:40 DEBUG JdbcTemplate - Executing SQL query [ select * from ts_user ]
2016.11.15 12:50:40 DEBUG DataSourceUtils - Fetching JDBC Connection from DataSource
2016.11.15 12:50:40 DEBUG DataSourceUtils - Registering transaction synchronization for JDBC Connection
2016.11.15 12:50:40 INFO UserDaoImpl - 离开方法 [findUserList] ;返回值 [[UserEntity [id=1, userName=林肯, loginName=liken, password=670b14728ad9902aecba32e22fa4f6bd], UserEntity [id=2, userName=马克, loginName=make, password=32e22fa4f6bd670b14728ad9902aecba], UserEntity [id=3, userName=德克, loginName=deke, password=8ad9902aecba32e22670b1472fa4f6bd], UserEntity [id=4, userName=科林, loginName=kelin, password=70b14728ad9902aecba32e22fa4f6bd6]]].
2016.11.15 12:50:40 INFO UserDaoImpl - 执行方法耗时：20毫秒。
2016.11.15 12:50:40 DEBUG DataSourceUtils - Returning JDBC Connection to DataSource
2016.11.15 12:50:40 DEBUG DefaultListableBeanFactory - Returning cached instance of singleton bean ‘logAspect‘
2016.11.15 12:50:40 INFO SystemParamDaoImpl - 进入方法 [getSystemParamByCategoryCode];参数 [[sex]]
2016.11.15 12:50:40 DEBUG -SystemParamDaoImpl- - syp from db!
2016.11.15 12:50:40 DEBUG JdbcTemplate - Executing prepared SQL query
2016.11.15 12:50:40 DEBUG JdbcTemplate - Executing prepared SQL statement [ select type_code,type_name from ts_system_param where category_code=? ]
2016.11.15 12:50:40 DEBUG DataSourceUtils - Fetching JDBC Connection from DataSource
2016.11.15 12:50:40 DEBUG PreparedStatementPool - {conn-10001, pstmt-20001} enter cache
2016.11.15 12:50:40 DEBUG DataSourceUtils - Returning JDBC Connection to DataSource
2016.11.15 12:50:40 DEBUG -SystemParamDaoImpl- - category_code:scode;result:[SystemParamEntity [typeCode=0, typeName=男], SystemParamEntity [typeCode=1, typeName=女]]
2016.11.15 12:50:40 INFO SystemParamDaoImpl - 离开方法 [getSystemParamByCategoryCode] ;返回值 [[SystemParamEntity [typeCode=0, typeName=男], SystemParamEntity [typeCode=1, typeName=女]]].
2016.11.15 12:50:40 INFO SystemParamDaoImpl - 执行方法耗时：20毫秒。
2016.11.15 12:50:40 DEBUG Segment - put added 0 on heap
2016.11.15 12:50:40 DEBUG DefaultListableBeanFactory - Invoking afterPropertiesSet() on bean with name ‘user/userList‘
2016.11.15 12:50:40 DEBUG DispatcherServlet - Rendering view [org.springframework.web.servlet.view.JstlView: name ‘user/userList‘; URL [/WEB-INF/jsp/user/userList.jsp]] in DispatcherServlet with name ‘dispatcherServlet‘
2016.11.15 12:50:40 DEBUG JstlView - Added model object ‘sexList‘ of type [java.util.ArrayList] to request in view with name ‘user/userList‘
2016.11.15 12:50:40 DEBUG JstlView - Added model object ‘userList‘ of type [java.util.ArrayList] to request in view with name ‘user/userList‘
2016.11.15 12:50:40 DEBUG Segment - fault removed 0 from heap
2016.11.15 12:50:40 DEBUG Segment - fault added 0 on disk
2016.11.15 12:50:40 DEBUG JstlView - Forwarding to resource [/WEB-INF/jsp/user/userList.jsp] in InternalResourceView ‘user/userList‘
2016.11.15 12:50:41 DEBUG DispatcherServlet - Successfully completed request
在Springmvc的工程中对DAO做切面来评估DAO的方法耗时时间
标签：amd gets cat 自动 null util mil array jar
原文地址：http://www.cnblogs.com/dhsunny/p/6064536.html
