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struts2自定义类型转换(1)基于DefaultTypeConverter

2011-12-02 23:50 597 查看
User.java

package com.org;

public class User {
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}


UserAction.java
package com.org;
import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {
private User user;

public void setUser(User user) {
this.user = user;
}
public User getUser() {
return user;
}

@Override
public String execute()throws Exception{
System.out.println("username: "+getUser().getUsername());
System.out.println("password: "+getUser().getPassword());
return SUCCESS;
}

}


编写类型转换器 UserConvert.java
package com.org;

import java.util.Map;
import java.util.StringTokenizer;

import ognl.DefaultTypeConverter;

public class UserConvert extends DefaultTypeConverter {
@Override
public Object convertValue(Map context, Object value, Class toType) {
// TODO Auto-generated method stub
//从前台转后台
if(User.class == toType){
String str[] = (String[])value;
String v = str[0];
//取出字符串
StringTokenizer st = new StringTokenizer(v,";");
String username = st.nextToken();
String password = st.nextToken();
User user = new User();
user.setUsername(username);
user.setPassword(password);
return user;

}else if(String.class == toType){  //从后台转到前台
User user = (User)value;
String username = user.getUsername();
String password = user.getPassword();
return "Username: "+username+",Password: "+password;
}
return null;
}
}


UserAction-conversion.properties配置文件
user=com.org.UserConvert

info.jsp

<body>
请输入用户名和密码中间以分号隔开：<br>
<form action="userAction" method="post">
<!-- name属性值一定要对应Action中的属性 -->
<input type="text" name="user"><br>
<input type="submit" value="提交"/>
</form>
</body>

success.jsp

用struts2标签取出数据

<body>
SUCCESS!!!<s:property value="user"/>
</body>


struts.xml配置文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>

<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="false" />

<package name="default" extends="struts-default">
<action name="userAction" class="com.org.UserAction">
<result name="success">/success.jsp</result>
</action>
</package>

</struts>


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