标签的使用

本文装载自：http://karidyang.iteye.com/blog/611096

代码很经典

POJO

Java代码

@Entity  

@Table(name = "P_AREA")   

@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)   

public class Area {   

@Id  

        private Long id;   

    private String areaName;   

  

        // getter and setter   

}  

@Entity
@Table(name = "P_AREA")
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class Area {
        @Id
        private Long id;
	private String areaName;

        // getter and setter
}

 

Java代码

@Entity  

@Table(name = "P_HOUSE")   

@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)   

public class House {   

        @Id  

        private Long id;   

    private String houseCode;   

  

        //getter and setter   

}  

@Entity
@Table(name = "P_HOUSE")
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class House {
        @Id
        private Long id;
	private String houseCode;

        //getter and setter
}

 

Java代码

@Entity  

@Table(name = "P_PERSON")   

@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)   

public class Person {   

        @Id  

        private Long id;   

    private String name;   

  

        //getter and setter   

}  

@Entity
@Table(name = "P_PERSON")
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class Person {
        @Id
        private Long id;
	private String name;

        //getter and setter
}

 

 

Action如下：

Java代码

@Namespace("/")   

@Results( { @Result(name = CrudActionSupport.RELOAD, location = "person.action", type = "redirect") })   

public class PersonAction extends CrudActionSupport{   

       

    private List<Person> persons;   

    private Long areaId;   

    private Long houseId;   

       

    private List<Area> areaList;   

    private Map<Long, List<House>> houseMap;   

    //服务层接口   

    @Autowired  

    private ServiceManage serviceManage;   

       

    @Override  

    public String list() throws Exception {   

           

           

        //从数据库查询所有的区域   

        areaList = serviceManage.searchArea();   

        houseMap = new HashMap<Long, List<House>>();   

        //封装HouseMap   

        for (Area area : areaList) {   

            houseMap.put(area.getId(), area.getHouseList());   

        }   

        if (houseId == null) {   

            addActionError("请选择房号");   

            return SUCCESS;   

        }   

        persons = serviceManage.searchPerson(houseId);   

        return SUCCESS;   

    }   

       

    //getter and setter   

  

}  

@Namespace("/")
@Results( { @Result(name = CrudActionSupport.RELOAD, location = "person.action", type = "redirect") })
public class PersonAction extends CrudActionSupport{
	
	private List<Person> persons;
	private Long areaId;
	private Long houseId;
	
	private List<Area> areaList;
	private Map<Long, List<House>> houseMap;
	//服务层接口
	@Autowired
	private ServiceManage serviceManage;
	
	@Override
	public String list() throws Exception {
		
		
		//从数据库查询所有的区域
		areaList = serviceManage.searchArea();
		houseMap = new HashMap<Long, List<House>>();
		//封装HouseMap
		for (Area area : areaList) {
			houseMap.put(area.getId(), area.getHouseList());
		}
		if (houseId == null) {
			addActionError("请选择房号");
			return SUCCESS;
		}
		persons = serviceManage.searchPerson(houseId);
		return SUCCESS;
	}
	
	//getter and setter

}

 

页面: person.jsp

Java代码

<s:form id="mainForm" action="person.action" method="post">   

        <div id="filter">   

            <div style="float: left">   

            请选择房间:<s:doubleselect list="areaList"    

                listKey="id"    

                listValue="areaName"  

                doubleName="houseId"  

                name="areaId"  

                doubleList="houseMap.get(top.id)" //此处top指第一个列表当前选择到的对象   

                doubleListKey="id"  

                doubleListValue="houseCode"  

                theme="custom"  //custom是自定义的模板类型，取消了原来模板中的<br />   

 />   

            </div>   

            <input type="button" value="搜索" onclick="search();"/>   

        </div>   

           

        <div id="content">   

            <table id="contentTable">   

                <tr>   

                    <th><房号</th>   

                    <th>姓名</th>   

                </tr>   

                <s:iterator value="person">   

                    <tr>   

                        <td>${house.houseCode }&nbsp;</td>   

                        <td>${name }&nbsp;</td>   

                    </tr>   

                </s:iterator>   

            </table>   

        </div>   

    </s:form>  

<s:form id="mainForm" action="person.action" method="post">
		<div id="filter">
			<div style="float: left">
			请选择房间:<s:doubleselect list="areaList" 
				listKey="id" 
				listValue="areaName"
                doubleName="houseId"
                name="areaId"
                doubleList="houseMap.get(top.id)" //此处top指第一个列表当前选择到的对象
                doubleListKey="id"
                doubleListValue="houseCode"
                theme="custom"  //custom是自定义的模板类型，取消了原来模板中的<br />
 />
            </div>
			<input type="button" value="搜索" onclick="search();"/>
		</div>
		
		<div id="content">
			<table id="contentTable">
				<tr>
					<th><房号</th>
					<th>姓名</th>
				</tr>
				<s:iterator value="person">
					<tr>
						<td>${house.houseCode }&nbsp;</td>
						<td>${name }&nbsp;</td>
					</tr>
				</s:iterator>
			</table>
		</div>
	</s:form>

 

 

自定义模板

在classpath下新建template/custom目录，拷贝struts2-core-2.1.8.jar\template\xhtml\doubleselect.ftl到该目录下，删除文件中的<br />

或者创建css样式

.doubleselect br{

 display:none;
}

jsp页面：

 <div class="doubleselect">

<s:doubleselect list="areaList"
listKey="id"
listValue="areaName"
                doubleName="houseId"
                name="areaId"
                doubleList="houseMap.get(top.id)" //此处top指第一个列表当前选择到的对象
                doubleListKey="id"
                doubleListValue="houseCode"
                theme="simple"  />

 

</div>