基於SpringMVC模式的配置

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Spring mvc 目前支持5個tag,分別是web

mvc:annotation-driven,mvc:interceptors,mvc:view-controller, mvc:resources和mvc:default-servlet-handlerspring

mvc:annotation-drivenjson

註冊 DefaultAnnotationHandlerMapping 和AnnotationMethodHandlerAdapter兩個bean,及一系列缺省的messageconverter(須要classpath中有相應的lib包的支持。)mvc

至關於如下配置的效果。app

<bean
    class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
    <property name="order" value="0" />
</bean>

<bean
    class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="webBindingInitializer">
        <bean
            class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
            <property name="validator" ref="validator" />
        </bean>
    </property>
    <property name="messageConverters">
        <list>
            <bean
                class="org.springframework.http.converter.ByteArrayHttpMessageConverter" />
            <bean
                class="org.springframework.http.converter.StringHttpMessageConverter" />
            <bean class="org.springframework.http.converter.FormHttpMessageConverter" />
            <bean
                class="org.springframework.http.converter.xml.SourceHttpMessageConverter" />
            <bean
                class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />
        </list>
    </property>
</bean>

<bean id="validator"
    class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" />
<bean id="conversion-service"
    class="org.springframework.format.support.FormattingConversionServiceFactoryBean" />

注意在3.0.5版本中不支持在 mvc:annotation-driven中再註冊新的messageconveter,在3.1版本中能夠支持,寫法以下jsp

<mvc:annotation-driven>
    <mvc:message-converters>
        <bean class="org.springframework.http.converter.StringHttpMessageConverter" />
        <bean
            class="org.springframework.http.converter.ResourceHttpMessageConverter" />
        <bean
            class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />
    </mvc:message-converters>
</mvc:annotation-driven>

mvc:interceptorside

註冊HandlerInterceptors 或 WebRequestInterceptors 攔截器來攔截request請求。svg

例如post

<mvc:interceptors>
    <mvc:interceptor>
        <mvc:mapping path="/*" />
        <bean class="net.zhepu.web.interceptor.Testinterceptor" />
    </mvc:interceptor>
</mvc:interceptors>

攔截器實現代碼以下url

public void afterCompletion(HttpServletRequest request,

HttpServletResponse response, Object handler, Exception ex)
        throws Exception {
    log.debug("afterCompletion");
}

@Override
public void postHandle(HttpServletRequest request,
        HttpServletResponse response, Object handler,
        ModelAndView modelAndView) throws Exception {
    log.debug("postHandle");
}

@Override
public boolean preHandle(HttpServletRequest request,
        HttpServletResponse response, Object handler) throws Exception {
    log.debug("preHandle");
    
    log.debug(handler.getClass().getName());
    return super.preHandle(request, response, handler);
}

mvc:default-servlet-handler

將spring mvc的DispatcherServlet替換當前web server的缺省的Servlet。這樣作的好處是定義spring mvc處理請求時,再也不須要定義.do,.action,/action/之類的url-pattern,而是能夠直接定義爲<url-pattern>/</url-pattern> (注意不是<url-pattern>/</url-pattern>,/*將匹配全部請求而致使全部jsp和靜態內容都沒法正常顯示,而/只匹配缺省的servlet)。

常見web 容器的default servlet name spring mvc中都能自動識別,但對於不常見的web 容器或default servlet name 被改寫過的,則需增長參數 default-servlet-name來指定對應的servlet name.

需與<mvc:annotation-driven/>一塊兒使用

mvc:view-controller

將指定路徑的請求直接轉到對應的view上,而不須要特定的controller來處理請求。

例如

<mvc:view-controller path="/hello/*" view-name="helloWorld"/> mvc:resources 將指定URL 的匹配模式來訪問靜態文件,如 <mvc:resources mapping="/js/**" location="/WEB-INF/js/" cache-period="3600"/> 表示將/WEB-INF/js/目錄映射到/js/目錄,cache超時時間爲3600秒。 則jsp中引用 js/helloWorld.js實際上指向的是 /WEB-INF/js/helloWorld.js.

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