spring boot 配置多个DispatcherServlet
传统的web项目
只需要在web.xml里配置多个即可,并且支持多个url-pattern
spring boot
我们默认无需配置,系统会自动装配一个,感兴趣的可以看下源码
org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration,里面有个 DispatcherServletRegistrationBean,关键是这里只能指定一个path,如下的源码截图
如果想要指定多个,我们只能自己写DispatcherServletRegistrationBean这个Bean了,那么系统就不会实例化内置的那个了,如下代码
@Autowired
private WebMvcProperties webMvcProperties;
@Autowired
private MultipartConfigElement multipartConfig;
@Bean
@Primary
public DispatcherServletRegistrationBean dispatcherServlet1(DispatcherServlet dispatcherServlet) {
DispatcherServletRegistrationBean registration = new DispatcherServletRegistrationBean(
dispatcherServlet, "/*");
registration.setName("dispatcherServlet1");
registration.setLoadOnStartup(
this.webMvcProperties.getServlet().getLoadOnStartup());
if (this.multipartConfig != null) {
registration.setMultipartConfig(this.multipartConfig);
}
return registration;
}
@Bean
public DispatcherServletRegistrationBean dispatcherServlet2(DispatcherServlet dispatcherServlet) {
DispatcherServletRegistrationBean registration = new DispatcherServletRegistrationBean(
dispatcherServlet, "/aaa/*");
registration.setName("dispatcherServlet2");
registration.setLoadOnStartup(
this.webMvcProperties.getServlet().getLoadOnStartup());
if (this.multipartConfig != null) {
registration.setMultipartConfig(this.multipartConfig);
}
return registration;
}
@Bean
public DispatcherServletRegistrationBean dispatcherServlet3(DispatcherServlet dispatcherServlet) {
DispatcherServletRegistrationBean registration = new DispatcherServletRegistrationBean(
dispatcherServlet, "/bbb/*");
registration.setName("dispatcherServlet3");
registration.setLoadOnStartup(
this.webMvcProperties.getServlet().getLoadOnStartup());
if (this.multipartConfig != null) {
registration.setMultipartConfig(this.multipartConfig);
}
return registration;
}
这样我们参考底层源码,我们做了三个Bean,注意有一个一定要加上@Primary注解,否则启动会有报错。
如果我们系统有一个接口url是/api/test,那么通过/aaa/api/test或者/bbb/api/test也都可以访问了。