備註:在myEclipse上配置Tomcat:
啓動Tomcat服務後,在瀏覽器輸入localhost:8080運行成功即表示配置成功html
配置到Tomcat上
再次啓動Tomcat,輸入地址後,若是能運行成功即表示新建成功
java
下載地址:
spring-framework-4.0.4.RELEASE-dist:http://repo.springsource.org/libs-release-local/org/springframework/spring/4.0.4.RELEASE/
commons-logging-1.1.3-bin:http://commons.apache.org
其餘諸如log4j之類的並非必須下載的。
若是下載速度慢能夠在國內網站下載。
附:
spring-4.3.13-all:
連接:https://pan.baidu.com/s/1tUUzKOkVLbkJD7jZukM1hg 提取碼:v2zc
commons-logging-1.2-bin:
連接:https://pan.baidu.com/s/1CdYp9ozTH-zVStaTw5WI1g 提取碼:1ixb
下載後得到的jar包放在lib文件夾下面
web
實體類Person:spring
package com.demo; public class Person { public String say(){ return "說了一句話:哇哈哈哈哈~"; } }
測試類:express
package com.demo; import org.junit.Test; public class Test01 { @Test public void test() { Person p =new Person(); System.out.println(p.say()); } }
項目的文件結構以下
apache
在上圖位置新建一個applicationContext.xml文件
內容以下:瀏覽器
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean id="person" class="com.demo.Person"></bean> </beans>
以後在web.xml定義這個文件tomcat
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <display-name></display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:resource/applicationContext.xml</param-value> </context-param> </web-app>
作好聲明處理以後,就能夠在測試類Test測試了,內容以下:app
package com.demo; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class Test01 { @Test public void test() { ApplicationContext ctx = new ClassPathXmlApplicationContext("resource/applicationContext.xml"); Person p = (Person) ctx.getBean("person", Person.class); System.out.println(p.say()); } }
測試成功後,這樣,最簡單的spring框架就弄好了。框架
新建完,在web.xml會自動添加如下配置:
<servlet> <servlet-name>IndexServlet</servlet-name> <servlet-class>com.servlet.IndexServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>IndexServlet</servlet-name> <url-pattern>/IndexServlet</url-pattern> </servlet-mapping>
在IndexServlet類下,修改以下代碼:
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ApplicationContext ctx = new ClassPathXmlApplicationContext("resource/applicationContext.xml"); Person p = (Person) ctx.getBean("person", Person.class); response.setCharacterEncoding("UTF-8"); response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println("<html><head><title>一二零叄的網站</title></head><body>"); out.print(p.say()+"</body></html>"); }
這時候輸入地址,就會出現想要的結果:
spring-aop-4.3.13.RELEASE.jar
配置信息以下:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="com.entity"></context:component-scan> <bean id="person1" class="com.entity.Person"></bean> </beans>
備註:
開啓註解掃描有兩種配置:
<context:component-scan base-package= ""/> <context:annotation-config/>
區別是:
a.兩種配置都能開啓註解掃描,這樣就可使用@Component、@Autowired這些註解了。
b.<context:component-scan base-package= 「」/>
會到指定包(包括指定包下的全部子包)中掃描類、方法、屬性上面是否有註解。(若有多個,可以使用逗號分隔)
<context:annotation-config></context:annotation-config>
這個配置只掃描屬性上是否有註解,因此通常不用寫。
package com.entity; import org.springframework.stereotype.Component; @Component("person2") public class Person { private String username; private int sex; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public int getSex() { return sex; } public void setSex(int sex) { this.sex = sex; } public String say(){ return "說了一句話:哇哈哈哈哈~"; } }
調用:
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ApplicationContext ctx = new ClassPathXmlApplicationContext("resource/applicationContext.xml"); Person p1 = (Person) ctx.getBean("person1"); p1.setUsername("張三"); Person p2 = (Person) ctx.getBean("person2"); p2.setUsername("李四"); response.setCharacterEncoding("UTF-8"); response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println("<html><head><title>一二零叄的網站</title></head><body>"); out.print(p1.getUsername() + p1.say()+"<br/>"); out.print(p2.getUsername() + p2.say()); out.print("</body></html>"); }
結果:
這樣,使用xml配置文件和使用註釋來注入依賴就均可以實現了
備註:
Spring容器有三種方式配置Bean:
一、基於xml配置Bean
二、使用註解定義Bean
(@Component、@Controller、@Service、@Repository)
三、基於javaConfig提供Bean定義信息(@Configuration、@Bean)
aspectj 1.8.10:http://mvnrepository.com/artifact/org.aspectj/aspectjrt/1.8.10
aspectjweaver 1.8.10:http://mvnrepository.com/artifact/org.aspectj/aspectjweaver/1.8.10
aopalliance 1.0:http://mvnrepository.com/artifact/aopalliance/aopalliance/1.0
附:
aopalliance、aspectjrt、aspectjweaver:
連接:https://pan.baidu.com/s/1rp6erh5WUVZsUymsO2b6Ow 提取碼:lm7x
package com.service; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.ProceedingJoinPoint; public class MyAdvice { public void beforeMethod(JoinPoint joinpoint) { System.out.println("前置通知---"); } public void afterMethod(JoinPoint joinpoint) { System.out.println("後置通知---"); } public void afterReturnning(JoinPoint joinpoint, Object result) { System.out.println("返回通知---"); } public void afterThrowing(JoinPoint joinpoint, Exception ex) { System.out.println("【異常通知】---" + joinpoint.toString()); } public Object aroundMethod(ProceedingJoinPoint pjp) { Object obj = null; try { System.out.println("環繞通知---"); long start = System.currentTimeMillis(); obj = pjp.proceed(); // 執行目標方法 long end = System.currentTimeMillis(); System.out.println("環繞通知結束---方法執行時間:" + (end - start)); } catch (Throwable e) { e.printStackTrace(); } return obj; } }
注:
JoinPoint:鏈接點(切入點)的鏈接對象,經過它能夠獲取目標對象中的信息。
Object resuldt的參數名必須與配置文件中的
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd"> <context:component-scan base-package="com.entity"></context:component-scan> <bean id="person1" class="com.entity.Person"></bean> <bean id="makePerson" class="com.service.MakePerson" /> <bean id="myAdvice" class="com.service.MyAdvice" /> <!-- aop的配置 --> <aop:config> <!-- 配置切入點 --> <!-- public * *(..) 表示全部public的方法 --> <aop:pointcut expression="execution(public * *(..))" id="pointcut" /> <!-- 配置切面及切入的對象 --> <aop:aspect ref="myAdvice"> <aop:before pointcut-ref="pointcut" method="beforeMethod" /> <aop:after pointcut-ref="pointcut" method="afterMethod" /> <aop:after-returning pointcut-ref="pointcut" method="afterReturnning" returning="result" /> <aop:around pointcut-ref="pointcut" method="aroundMethod" /> <aop:after-throwing pointcut-ref="pointcut" method="afterThrowing" throwing="ex" /> </aop:aspect> </aop:config> </beans>
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ApplicationContext ctx = new ClassPathXmlApplicationContext("resource/applicationContext.xml"); Person p1 = (Person) ctx.getBean("person1"); p1.setUsername("張三"); Person p2 = (Person) ctx.getBean("person2"); p2.setUsername("李四"); MakePerson p3 = (MakePerson) ctx.getBean("makePerson"); response.setCharacterEncoding("UTF-8"); response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println("<html><head><title>一二零叄的網站</title></head><body>"); out.print(p1.getUsername() + p1.say()+"<br/>"); out.print(p2.getUsername() + p2.say()+"<br/>"); out.print(p3.getNewPerson("王五")); out.print("</body></html>"); }
後臺顯示:
這樣,就可以使用spring的注入依賴和麪向切面技術了,一個很簡單的spring框架就搭好了。 附: Spring PPT教程: 連接:https://pan.baidu.com/s/1T6ZJrb9Pbb2_Qmso72trIg 提取碼:x1sn