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DWR简单实例

2024-08-05 16:16:52   221人阅读

1. 首先需要的jar,如果是maven可以添加如下依赖

    
<dependency>
      <groupId>org.directwebremoting</groupId>
      <artifactId>dwr</artifactId>
      <version>2.0.1</version>
</dependency>

2. web.xml中添加如下配置项
<servlet>
      <servlet-name>dwr-invoker</servlet-name>
      <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
      <init-param>
           <param-name>classes</param-name>
           <param-value>java.lang.Object</param-value>
      </init-param>
      <init-param>
           <param-name>debug</param-name>
           <param-value>true</param-value>
      </init-param>
</servlet>
<servlet-mapping>
      <servlet-name>dwr-invoker</servlet-name>
      <url-pattern>/dwr/*</url-pattern>
</servlet-mapping>

3. 在与web.xml平级加入dwr.xml文件，文件内容如下
<?xml version="1.0" encoding="UTF-8"?> 
    <!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN"     
            "http://www.getahead.ltd.uk/dwr//dwr20.dtd">
    <dwr>
        <allow>
            <create creator="new" javascript="testDwr"><!--创建前端所需的js实体-->
                <param name="class" value=http://www.mamicode.com/"com.dwr.test.TestDwr" />>

4. 测试的java后台类
public class TestDwr {
     public String method1(String name){
         return "your name is "+name;
     }
 
     public Map<String,String> method2(String name){
          Map<String,String> tmp = new HashMap<String,String>();
          tmp.put("name", name);
          return tmp;
     }
 
     public Student method3(String name,int age){
          return new Student(name,age);
     }
}
package com.dwr.test;

public class Student {
	/**
	 * 
	 */
	private String name;
	private int age;
	
	public Student(){
	}
	
	public Student(String name,int age){
		this.name=name;
		this.age=age;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}
}

5. 前端页面代码
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Expires" CONTENT="0"> 
<meta http-equiv="Cache-Control" CONTENT="no-cache"> 
<meta http-equiv="Pragma" CONTENT="no-cache"> 
<META HTTP-RQUIV="Refresh" CONTENT="2">
<title>test</title>
<script type="text/javascript" src=http://www.mamicode.com/"/testMaven/dwr/engine.js"></script>>


DWR简单实例


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