本地中文化网址
http://wiki.javascud.org/display/ww2cndoc/Home
在线文档
http://www.opensymphony.com/webwork/wikidocs
与
struts
的区别有实现国级化的时候，
struts
的
message
只能出现
5
个动态的值
也就像下面的信息
Your {0} ticket(s) for flight {1} have been booked.
The total cost is {2}. Your confirmation number is {3}.
Your flight leaves at {4} and arrives at {5}
需要分成两段才能完成
<bean:message key="confirmation.msg1"
arg0="count" arg1="flightNumber" arg2="cost"/>
<bean:message key="confirmation.msg2"
arg0="confirmation" arg1="departure" arg2="arrival"/>
而
webwork
是无限制的，像上面的可以写成这样子
<ww:text name="confirmation.msg">
<ww:param value="count"/>
<ww:param value="flightNumber"/>
<ww:param value="cost"/>
<ww:param value="confirmation"/>
<ww:param value="departure"/>
<ww:param value="arrival"/>
</ww:text>
还有在web.xml里同指定webwork的tld所在位置
<taglib>
<taglib-uri>webwork</taglib-uri>
<taglib-location>
/WEB-INF/lib/webwork-2.1.7.jar
</taglib-location>
</taglib>
在很多书上都讲上面可行，可是我却报下面的错．．．换成下面那种方式就ok了
org.apache.jasper.JasperException: Unable to initialize TldLocationsCache: null
也可以指定webwork.tld所在的位置也可以，，如
/WEB-INF/webwork.tld(webwork.tld拷到这下面来).
一个简单的例子
import com.opensymphony.xwork.Action;
public class HelloWorldAction implements Action{
String greeting;
public String getGreeting() {
return greeting;
}
public String execute() throws Exception {
greeting = "Hello World!";
return SUCCESS;
}
}
实现的action接口里面只有一个方法
interface Action {
String execute() throws Exception;
}
greetings.jsp
<%@ taglib prefix="ww" uri="webwork" %>
<html>
<head>
<title>First WebWork Example</title>
</head>
<body>
<p><ww:property value="greeting"/></p>
</body>
</html>
xwork.xml 放到就用的classpath下面(也就web-inf/classes下面)
<action name="hello" class="HelloWorldAction">
<result name="success" type="dispatcher">
<param name="location">/greetings.jsp</param>
</result>
<interceptor-ref name="debugStack"/>
<interceptor-ref name="defaultStack"/>
</action>
还有在web.xml里面加上webwork的一个加载类
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>com.opensymphony.webwork.dispatcher.ServletDispatcher</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
ActionSupport
1:提供对错误信息的支持
•
action and field specific errors
•
field errors are automatically supported by views
–
2:国际化的支持
•
1 resource bundle per action
•
pervasive UI support for retrieving messages
--------------------------------------------------------------------------------
ActionSupport Example:
import com.opensymphony.xwork.ActionSupport;
public class HelloWorldAction extends ActionSupport{
String greeting;
public void setGreeting(String greeting) {
this.greeting = greeting;
}
public String getGreeting() {
return greeting;
}
public String execute() throws Exception {
if (greeting.equals("") || greeting == null) {
addFieldError("greeting", getText("greeting"));
return ERROR;
}
return SUCCESS;
}
}
这里的getText("greeting")的greeting要与
HelloWorldAction.properties(放在与HelloWorldAction.class同级目录下面，名称也一样)里的greeting=Enter your greeting please相同
上面的set.get其实与struts当中的ActionFrom类似．．
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%@ taglib prefix="ui" uri="webwork" %>
<html>
<head>
<title>First WebWork Example</title>
</head>
<body>
<form action="hello.action" method="post">
<table>
<ui:textfield label="欢迎语句" name="greeting"/>
<ui:submit value="'Submit'"/>
</table>
</form>
</body>
</html>
这里的greeting要与HelloWorldActio.java里的属性一致
如出现错误会显示在当前页，
如填上内容，就会相应的调用setGreeting()方法的．．
<%@ taglib prefix="ww" uri="webwork" %>
<html>
<head>
<title>First WebWork Example</title>
</head>
<body>
<p><ww:property value="greeting"/></p>
</body>
</html>
把填的内容显示出来
在xwork.xml里的<action>
也相应的变成
<action name="hello" class="helloWorld.HelloWorldAction">
<result name="success" type="dispatcher">
<param name="location">/greetings.jsp</param>
</result>
<result name="error" type="dispatcher">
<param name="location">/index.jsp</param>
</result>
</action>
------------------------------------------------------------
Model-Driven Actions vs. Field-Driven Actions
•
2 types of Actions possible:
(1)Field-Drivern上面的例子就是
(2)ModelDriven
package helloWorld;
public class Pet {
private long id;
private String name;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
--
package helloWorld;
import com.opensymphony.xwork.*;
public class AddPetAction extends ActionSupport implements ModelDriven{
Pet pet = new Pet();
public Object getModel() {
return pet;
}
protected void doValidation() {
if (pet.getId() == 0) {
addFieldError("id", "Please enter in an id number for you new Pet.");
}
}
public String doExecute() throws Exception {
if (hasErrors())
return ERROR;
return SUCCESS;
}
}
需实现ModelDriven这个接口，它也只有一个方法
public Object getModel();
在xwork.xml加上
<action name="addpet" class="helloWorld.AddPetAction">
<result name="success" type="dispatcher">
<param name="location">/petadded.jsp</param>
</result>
<result name="error" type="dispatcher">
<param name="location">/addpet.jsp</param>
</result>
<interceptor-ref name="debugStack" />
<interceptor-ref name="defaultStack" />
</action>
还有两个页面分别用来添加和显示用的
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="ui" uri="webwork" %>
<html>
<head>
<title>First WebWork Example</title>
</head>
<body>
<form action="addpet.action" method="post">
<table>
<ui:textfield label="Pet ID Number" name="id"/>
<ui:textfield label="Name of Pet" name="name"/>
<ui:submit value="'Submit'"/>
</table>
</form>
</body>
</html>
-------petadded.jsp
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="ww" uri="webwork" %>
<html>
<head>
<title>First WebWork Example</title>
</head>
<body>
<p>Added a pet with the following properties:</p>
<ul>
<li>ID: <ww:property value="id"/></li>
<li>Name: <ww:property value="name"/></li>
</ul>
</form>
</body>
</html>