SpringMVC 的两种Initiallizer方法

package com.ellin.lc.config;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration.Dynamic;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.context.support.XmlWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

public class LoveCalculatorApplicationInitializer implements WebApplicationInitializer {

    public void onStartup(ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext webApplcationContext = new AnnotationConfigWebApplicationContext();
        webApplcationContext.register(LoveCalculatorAppConfig.class);
        
        //create a dispatcher servlet object
        DispatcherServlet dispatcherServlet = new DispatcherServlet(webApplcationContext);
        
        //register the dispatcher servlet with the servlet context
        Dynamic myCustomDispatcherServlet = servletContext.addServlet("myDispatcherServlet", dispatcherServlet);
        
        myCustomDispatcherServlet.setLoadOnStartup(1);
        myCustomDispatcherServlet.addMapping("/mywebsite.com/*");

    }

}

 

package com.ellin.lc.config;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class LCAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        Class arr[] = {LoveCalculatorAppConfig.class};
        return arr;
    }

    @Override
    protected String[] getServletMappings() {
        String arr[] = {"/mywebsite.com/*"};
        return arr;
    }

}

 

两种其实都是实现了WebApplicationInitializer接口，一个是自己手动实现，一个是Spring帮我们实现的。

 

DispatcherServlet负责接收请求并分发到各个controller中，最后收集响应并回复给客户端。