SpringBoot 整合 dwr ,实现 js 直接调用后端 Service

听小伙伴提到一个技术,就自己试了试,下面是一个入门小 demo, 想深入了解的话可以自行研究

DWR 官方主页：

pom.xml

    
        
     
      4.0.0
         
     
      com.junbaor
         
     
      dwr
         
     
      0.0.1-SNAPSHOT
         
     
      jar
         
     
      dwr
         
     
      Demo project for Spring Boot
         
             
      
       org.springframework.boot
              
      
       spring-boot-starter-parent
              
      
       1.5.9.RELEASE
              
       
          
         
             
      
       UTF-8
              
      
       UTF-8
              
      
       1.8
          
         
             
                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-web
               
              
                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-freemarker
               
              
                  
       
        org.directwebremoting
                   
       
        dwr
                   
       
        3.0.2-RELEASE
               
              
                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-test
                   
       
        test
               
          
         
             
                  
                       
        
         org.springframework.boot
                        
        
         spring-boot-maven-plugin
                    
               
          
         
    

DwrApplication.java

package com.junbaor.dwr;import org.directwebremoting.spring.DwrSpringServlet;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.web.servlet.ServletRegistrationBean;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.ImportResource;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controller@SpringBootApplication@ImportResource(locations = "classpath:spring.xml")public class DwrApplication {    public static void main(String[] args) {        SpringApplication.run(DwrApplication.class, args);    }    @RequestMapping    public String index() {        return "index";    }    @Bean    public ServletRegistrationBean servletRegistrationBean() {        DwrSpringServlet servlet = new DwrSpringServlet();        ServletRegistrationBean registrationBean = new ServletRegistrationBean(servlet, "/dwr/*");        registrationBean.addInitParameter("debug", "true");        return registrationBean;    }}

DemoService.java

package com.junbaor.dwr;import org.directwebremoting.annotations.RemoteMethod;import org.directwebremoting.annotations.RemoteProxy;import org.springframework.stereotype.Service;@Service@RemoteProxypublic class DemoService {    // 这里也可以使用 @Autowired 注入依赖的其他服务    @RemoteMethod    public String hello() {        return "hello";    }    @RemoteMethod    public String echo(String string) {        return string;    }}

application.properties

spring.freemarker.template-loader-path=classpath:/templates/spring.freemarker.cache=falsespring.freemarker.charset=UTF-8spring.freemarker.check-template-location=truespring.freemarker.content-type=text/htmlspring.freemarker.expose-request-attributes=truespring.freemarker.expose-session-attributes=truespring.freemarker.request-context-attribute=requestspring.freemarker.suffix=.ftl

spring.xml

index.ftl

            hello

刷新网页, 就会执行后端的 echo 方法, 前端接受响应后会执行回调函数