spring3.0 MVC筆記
一、註解注入與自動裝配(annotation inject and auto wire)
1、只需要基本的配置
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="com.tdrc.learnspring3.example">
</context:component-scan>
</beans>
不需要詳細定義每個bean
關鍵是<context:component-scan base-package=一定要寫對，其下的POJO按照註解會自動註冊進ApplicationContext
2、基本註解
@Component("one")
//解釋註解後註冊成一個bean
//相當於<bean id="one" class="com.tdrc.test.One"/>
public class One{
@Autowired //可在屬性上，不用get、set方法
private Memer member
//相當於<property name="member" ref="member".../>
private Integer age
@autowired //可在set方法上
public void setAge(Intgeger age){
this.age= age;
}
}
3、配置spring MVC
在web.xml中增加
<servlet>
<servlet-name>hello</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>hello</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
spring自動尋找hello-servlet.xml作爲spring配置文件
如果還需要其他的spring xml文件
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:hello.xml
</param-value>
</context-param>
hello-servlet.xml：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<mvc:resources mapping="/resources/**" location="/resources/" />
<mvc:annotation-driven/>
<context:component-scan base-package="com.tdrc.learnspring3.example.mvc" />
<bean class=
"org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
4、在spring MVC 3.0中的註解
@Component擴展爲@Controller定義控制器bean，相當於struts2的action類
@RequestMapping定義映射到控制器類與控制器方法的URL
@Controller
@RequestMapping("/member")
public class MemberControler {
private HelloService service;
@Inject
public MemberControler(HelloService service){
this.service = service;
}
@RequestMapping(method=RequestMethod.GET,params="register")
public String prepare(Model model){
Member m = new Member();
model.addAttribute(m);
return "member/edit";
}
@RequestMapping(method=RequestMethod.POST)
public String register(@Validated Member member, BindingResult bindingResult){
if(bindingResult.hasErrors()){
return "member/edit";
}
service.addMember(member);
return "redirect:/member/"+member.getMemberName();
}
5、數據處理
Controller中的方法可帶參數Map<String,Object>和Model
處理方法把處理結果放到map或model中等待view解析處理
處理方法返回view的邏輯視圖名稱字符串
Map中存放命名對象
Model中直接存放對象,不需要命名,spring自動按類名依照駝峯式命名,如果是List後面跟上List
6、數據展現
視圖解析器viewResolver
有很多種，直接解析jsp用
<bean class=
"org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
如果需要jstl，上面加上
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
