spring+dwr

客官°小女子只卖身不卖艺 2022-08-19 15:14 133阅读 0赞

最近在研究dwr推技术，想要实现服务器端在某个条件触发时，自动向指定页面传送数据。

以spring+dwr为例，采用maven管理jar包

项目的结构图如下：

![Center][]

spring.xml配置

<?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:context="http://www.springframework.org/schema/context"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans
    			http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
    			http://www.springframework.org/schema/context
    			http://www.springframework.org/schema/context/spring-context-4.1.xsd">
    
    	<bean id="dwrtest" class="com.bjsxt.dwrtest.Test0"></bean> 
    	  
        <bean id="dwrtest2" class="com.bjsxt.dwrtest.Test1"></bean> 
        
        <bean id="dwrtest3" class="com.bjsxt.dwrtest.SendMsg"></bean> 
        
    </beans>

dwr.xml配置

<?xml version="1.0" encoding="UTF-8"?>  
    <!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://getahead.org/dwr/dwr20.dtd">  
    <dwr>  
      <allow>  
         <create javascript="T0" creator="spring" >  
                <param name="beanName" value="dwrtest"></param> 
               
         </create>  
           
         <create javascript="T1" creator="spring" >  
                <param name="beanName" value="dwrtest2"></param>  
         </create>  
         <create javascript="SendMsg" creator="spring">  
                   <param name="beanName" value="dwrtest3"></param>  
         </create>  
         
         <convert converter="bean" match="com.bjsxt.bean.User"/> 
       
      </allow>  
    </dwr>

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>com</groupId>
      <artifactId>dwrTest</artifactId>
      <packaging>war</packaging>
      <version>0.0.1-SNAPSHOT</version>
      <name>dwrTest Maven Webapp</name>
      <url>http://maven.apache.org</url>
      
       <properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    		<spring.version>4.1.4.RELEASE</spring.version>
    		<jackson.version>2.5.0</jackson.version>
      </properties>
      <dependencies>
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>3.8.1</version>
          <scope>test</scope>
        </dependency>
        
         
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-core</artifactId>
    			<version>${spring.version}</version>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-beans</artifactId>
    			<version>${spring.version}</version>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-context</artifactId>
    			<version>${spring.version}</version>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-tx</artifactId>
    			<version>${spring.version}</version>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-web</artifactId>
    			<version>${spring.version}</version>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-webmvc</artifactId>
    			<version>${spring.version}</version>
    		</dependency>
        	
        	
      		<dependency>
    			<groupId>org.directwebremoting</groupId>
    			<artifactId>dwr</artifactId>
    			<version>3.0.M1</version>
    		</dependency>
    		
    		
    		<dependency>
    			<groupId>commons-logging</groupId>
    			<artifactId>commons-logging</artifactId>
    			<version>1.2</version>
    		</dependency>
    		
    		
    		<dependency>
    			<groupId>org.json</groupId>
    			<artifactId>json</artifactId>
    			<version>20140107</version>
    		</dependency>
      </dependencies>
      <build>
        <finalName>dwrTest</finalName>
      </build>
    </project>

User类

package com.bjsxt.bean;
    
    public class User {
    	
    	private int id;
    	
    	private String name;
    
    	public int getId() {
    		return id;
    	}
    
    	public void setId(int id) {
    		this.id = id;
    	}
    
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	@Override
    	public String toString() {
    		return "User [id=" + id + ", name=" + name + "]";
    	}
    	
    }

SendMsg类

package com.bjsxt.dwrtest;
    
    import java.util.Collection;
    
    import org.directwebremoting.ScriptBuffer;
    import org.directwebremoting.ScriptSession;
    import org.directwebremoting.WebContext;
    import org.directwebremoting.WebContextFactory;
    import org.directwebremoting.proxy.dwr.Util;
    
    public class SendMsg {  
        
        public void sendMsg(String msg){  
            //得到上下文  
            WebContext contex = WebContextFactory.get();  
              
            //得到要推送到 的页面  dwr3为项目名称 ， 一定要加上。  
            Collection<ScriptSession> sessions = contex.getScriptSessionsByPage("/dwrTest/showMsg.jsp");  
              
            //不知道该怎么解释这个 ，   
            Util util = new Util(sessions);  
              
            //下面是创建一个javascript脚本 ， 相当于在页面脚本中添加了一句  show(msg);   
            ScriptBuffer sb = new ScriptBuffer();  
            sb.appendScript("show(");  
            sb.appendData(msg);  
            sb.appendScript(")");  
              
            //推送  
            util.addScript(sb);  
        }  
    }

Test0类

package com.bjsxt.dwrtest;
    
    import com.bjsxt.bean.User;
    
    public class Test0 {  
          
        public User method1(){  
        	/*JSONObject jsonObj=new JSONObject();
        	jsonObj.put("id", 12);
        	jsonObj.put("name","longyu");*/
        	User user=new User();
        	user.setId(1);
        	user.setName("ly");
            return user;  
        }  
        
       /* public static void main(String[] args) {
        	System.out.println(method1());
    	}*/
    }

Test1类

package com.bjsxt.dwrtest;
    
    public class Test1 {  
        
        public String   method1(){  
            return "调用方法111111";  
        }  
          
        public String   method2(){  
            return "调用方法222222";  
        }     
    }

jQuery.1.7.1.js下载地址：

项目下载地址：

[Center]: /images/20220731/f488c9f05a834e8c8eb98b3800e8a118.png

spring+dwr

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