如何使用注解配置SpringMVC的高级配置
1、SpringMVC使用xml文件配置的时候，一些高级属性是通过配置文件配置，如果要通过注解的方式值需要一个注解即可。
<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
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-4.3.xsd">
<mvc:default-servlet-handler/>
<mvc:annotation-driven />
</beans>
2、如果使用注解的方式实现上述高级功能，只需要使用@EnableWebMvc，开启SpringMVC定制功能。
package com.gwolf;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.FilterType;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.stereotype.Controller;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@ComponentScan(value="com.gwolf",
includeFilters= {@Filter(type=FilterType.ANNOTATION,
classes= {Controller.class})},useDefaultFilters=false)
@EnableWebMvc
public class AppConfig {
}
3、如果需要配置视图解析器，视图映射，静态资源映射，拦截器就需要实现一个类：WebMvcConfigurerAdapter。
4、配置视图解析器需要覆写方法：
@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
registry.jsp();
}
5、配置静态资源访问要覆写方法：
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
6、配置SpringMVC拦截器：
package com.gwolf;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.context.annotation.FilterType;
import org.springframework.stereotype.Controller;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@ComponentScan(value="com.gwolf",
includeFilters= {@Filter(type=FilterType.ANNOTATION,
classes= {Controller.class})},useDefaultFilters=false)
@EnableWebMvc
public class AppConfig extends WebMvcConfigurerAdapter{
@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
registry.jsp();
}
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new HandlerInterceptor() {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
}
}).addPathPatterns("/**");
}
}
