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[Java教程]Struts2(十一)OGNL标签三与Struts2标签


一、UI标签

 

二、简单例子

 

<h1>添加信息</h1><!--通过指定theme的属性改变主题 --><s:form action="" method="psot" theme="simple">房屋标题:<s:textfield id="title" name="title"></s:textfield><br/>房屋描述:<s:textarea value="房屋介绍 ...." name="desc"></s:textarea><br/><s:submit value="提交"></s:submit></s:form>

或者在struts.

<constant name="struts.ui.theme" value="simple" />

 

三、s:select

 

四、Ajax标签

 

更改模板后,要在src下建立相遇的包和文件才可以使用

五、简单例子

 实体类

package com.pb.entity;/* * 地区类 */public class District {    private int districtId;      //地区编号  private String districtName;  //地区名称    public District() {    super();    // TODO Auto-generated constructor stub  }  public District(int districtId, String districtName) {    super();    this.districtId = districtId;    this.districtName = districtName;  }  public int getDistrictId() {    return districtId;  }  public String getDistrictName() {    return districtName;  }  public void setDistrictId(int districtId) {    this.districtId = districtId;  }  public void setDistrictName(String districtName) {    this.districtName = districtName;  }    }

package com.pb.entity;/* * 街道 */public class Street {      private int streetId;      //街道ID    private String streetName;  //街道名称    private District district;    //街道所在地区    public Street() {      super();      // TODO Auto-generated constructor stub    }    public Street(int streetId, String streetName, District district) {      super();      this.streetId = streetId;      this.streetName = streetName;      this.district = district;    }    public District getDistrict() {      return district;    }    public int getStreetId() {      return streetId;    }    public String getStreetName() {      return streetName;    }    public void setDistrict(District district) {      this.district = district;    }    public void setStreetId(int streetId) {      this.streetId = streetId;    }    public void setStreetName(String streetName) {      this.streetName = streetName;    }        }

package com.pb.entity;import java.util.Date;/* * 房屋 */public class House {      private int houseId;  //房屋ID  private String title;    //房屋标题  private String desc;  //房屋描述  private Street street;//房屋所在街道  private Date addDate;//房屋发布日期  public House() {    super();    // TODO Auto-generated constructor stub  }  public House(int houseId, String title, String desc, Date addDate,      Street street) {    super();    this.houseId = houseId;    this.title = title;    this.desc=desc;    this.addDate = addDate;    this.street = street;  }  public Date getAddDate() {    return addDate;  }    public int getHouseId() {    return houseId;  }  public Street getStreet() {    return street;  }  public String getTitle() {    return title;  }  public void setAddDate(Date addDate) {    this.addDate = addDate;  }    public void setHouseId(int houseId) {    this.houseId = houseId;  }  public void setStreet(Street street) {    this.street = street;  }  public void setTitle(String title) {    this.title = title;  }  public String getDesc() {    return desc;  }  public void setDesc(String desc) {    this.desc = desc;  }}

package com.pb.entity;/* * 类型 */public class HouseType {  private int typeId;  private String type;  public HouseType() {    super();    // TODO Auto-generated constructor stub  }  public HouseType(int typeId, String type) {    super();    this.typeId = typeId;    this.type = type;  }  public int getTypeId() {    return typeId;  }  public void setTypeId(int typeId) {    this.typeId = typeId;  }  public String getType() {    return type;  }  public void setType(String type) {    this.type = type;  }  }

action

package com.pb.web.action;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import com.opensymphony.xwork2.ActionSupport;import com.pb.entity.District;import com.pb.entity.HouseType;import com.pb.entity.Street;public class AddAction extends ActionSupport {  private List<HouseType> types; // 房屋类型  private Map<District, List<Street>> map;// 地区-街道  public List<HouseType> getTypes() {    return types;  }  public void setTypes(List<HouseType> types) {    this.types = types;  }  public Map<District, List<Street>> getMap() {    return map;  }  public void setMap(Map<District, List<Street>> map) {    this.map = map;  }  public String addHouse() {    types = new ArrayList<HouseType>();    types.add(new HouseType(1, "单间"));    types.add(new HouseType(2, "一房一厅"));    types.add(new HouseType(3, "两室一厅"));    types.add(new HouseType(4, "两室两厅"));    //    // 声明地区    District dt1 = new District(75501, "宝安区");    District dt2 = new District(75502, "南山区");    // 声明街道    Street street1 = new Street(74, "布心一村", dt1);    Street street2 = new Street(25, "商业街", dt1);    Street street3 = new Street(87, "科技园", dt2);    Street street4 = new Street(99, "南头古城", dt2);    List<Street> streets1=new ArrayList<Street>();    List<Street> streets2=new ArrayList<Street>();    streets1.add(street1);    streets1.add(street2);    streets2.add(street3);    streets2.add(street4);        map=new HashMap<District, List<Street>>();    map.put(dt1, streets1);    map.put(dt2, streets2);    return SUCCESS;  }}

package com.pb.web.action;import java.util.Date;import com.opensymphony.xwork2.ActionSupport;import com.pb.entity.House;public class HouseAction extends ActionSupport {  private String title;  private String houseType;  private String district;  private String street;  private Date addDate;  private String desc;      @Override  public String execute() throws Exception {    System.out.println(title);    System.out.println(houseType);    System.out.println(district);    System.out.println(street);    System.out.println(addDate);    System.out.println(desc);    if(title.equals("")){      return ERROR;    }    if(desc.equals("")){      return INPUT;    }        return SUCCESS;  }  public String getTitle() {    return title;  }  public void setTitle(String title) {    this.title = title;  }  public String getHouseType() {    return houseType;  }  public void setHouseType(String houseType) {    this.houseType = houseType;  }  public String getDistrict() {    return district;  }  public void setDistrict(String district) {    this.district = district;  }  public String getStreet() {    return street;  }  public void setStreet(String street) {    this.street = street;  }  public Date getAddDate() {    return addDate;  }  public void setAddDate(Date addDate) {    this.addDate = addDate;  }  public String getDesc() {    return desc;  }  public void setDesc(String desc) {    this.desc = desc;  }}

struts.

<??><!DOCTYPE struts PUBLIC  "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"  "http://struts.apache.org/dtds/struts-2.3.dtd"><struts>  <constant name="struts.enable.DynamicMethodInvocation" value="false" />  <constant name="struts.devMode" value="true" />  <!--struts.ui.theme -->  <package name="default" namespace="/" extends="struts-default">    <action name="house" class="com.pb.web.action.AddAction" method="addHouse">  <result name="success">   /addHouse.jsp  </result>  </action>  <action name="add" class="com.pb.web.action.HouseAction">  <result name="success">   /addSuccess.jsp  </result>  <!-- 使用chain返回时,注册填写的信息仍然存在 -->   <result name="error" type="chain">     <param name="actionName">house</param>     <param name="namespace">/</param>  </result>  <!-- 使用chain返回时,注册填写的信息仍然存在 -->  <result name="input" type="chain">  <param name="actionName">house</param>  <param name="namespace">/</param>  </result>  </action>    </package></struts>

jsp页面 

<%@ page language="java" contentType="text/html; charset=UTF-8"  pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags"%><%@ taglib prefix="sx" uri="/struts-dojo-tags" %><%  String path = request.getContextPath();  String basePath = request.getScheme() + "://"      + request.getServerName() + ":" + request.getServerPort()      + path + "/";%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><sx:head parseContent="true"/><base href="<%=basePath%>"><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>添加信息</title></head><body>  <h1>添加信息</h1>  <!--通过指定theme的属性改变主题 -->  <!-- 此处一定要加name属性,不然下面2个下拉框必然报错-->  <s:form action="add.action" method="post" theme="simple" name="name">房屋标题:<s:textfield id="title" name="title"></s:textfield>    <br />房屋类型:<s:select name="houseType" list="types" listKey="typeId"      listValue="type" />    <br />房屋地址:<s:doubleselect name="district" list="map.keySet()" listKey="districtId"      listValue="districtName" doubleName="street"      doubleList="map.get(top)" doubleListKey="streetId"      doubleListValue="streetName" theme="doubleselect" />    <br /><br/>    发布日期<sx:datetimepicker name="addDate" label="" /><br/><br/>房屋描述:<s:textarea name="desc"></s:textarea>    <br />    <s:submit value="提交"></s:submit>  </s:form>  <s:debug /></body></html>