DWR使用步驟

 DWR使用步驟;

1.導入dwr.jar包,在web.xml文件裏面配製如下:

              <servlet>

              <servlet-name>dwr</servlet-name>

              <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>

              <init-param>

                     <param-name>debug</param-name>

                     <param-value>true</param-value>

              </init-param>

       </servlet>

       <servlet-mapping>

              <servlet-name>dwr</servlet-name>

              <url-pattern>/dwr/*</url-pattern>

       </servlet-mapping>

2.寫java文件如下:

package com.softeem.dwr;

 

import java.sql.Connection;

import java.sql.SQLException;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

 

import com.softeem.config.DataSourceFactory;

import com.softeem.dao.BookInfoDao;

import com.softeem.dto.CityDto;

 

public class GetInfo {

       Map<String,String> map = new HashMap<String,String>();

      

       public Map getCities(String id){

              Connection conn = null;

              try {

                     conn = DataSourceFactory.getBasicDataSource().getConnection();

                     BookInfoDao dao = new BookInfoDao(conn);

                     List<CityDto> list = dao.findCity(Integer.parseInt(id));

                     for(int i = 0;i < list.size();i++){

                            map.put(new Integer(list.get(i).getId()).toString(),list.get(i).getCity());

                     }

              } catch (SQLException e) {

                     // TODO Auto-generated catch block

                     e.printStackTrace();

              }

              return map;

       }

      

       public CityDto getCityDto(){

              CityDto dto = new CityDto();

              dto.setId(2);

              dto.setCity("hanwan");

              return dto;

       }

 

}

 

 

 

package com.softeem.dwr;

 

public class Service {

       public String sayHello(String name){

              return "hello " + name;

       }

}

      

3.增加配製文件dwr.xml,內容如下:

<?xml version="1.0" encoding="UTF-8"?>

<dwr>

       <allow>

              <create creator="new" javascript="service">

                     <param name="class" value="com.softeem.dwr.Service" />

              </create>

              <create creator="new" javascript="getInfo">

                     <param name="class" value="com.softeem.dwr.GetInfo" />

              </create>

              <convert converter="bean" match="com.softeem.dto.CityDto">

                     <param name="include" value="city,id" />

              </convert>

       </allow>

</dwr>

 

4.在jsp文件裏面加入代碼往下: