JavaWeb -- Struts2 ResultType细化, 国际化

1. ResultType细化

<result-types>
        	   <result-type name="chain" class="com.opensymphony.xwork2.ActionChainResult"/>
            <result-type name="dispatcher" class="org.apache.struts2.dispatcher.ServletDispatcherResult" default="true"/>
            <result-type name="freemarker" class="org.apache.struts2.views.freemarker.FreemarkerResult"/>
            <result-type name="httpheader" class="org.apache.struts2.dispatcher.HttpHeaderResult"/>
            <result-type name="redirect" class="org.apache.struts2.dispatcher.ServletRedirectResult"/>
            <result-type name="redirectAction" class="org.apache.struts2.dispatcher.ServletActionRedirectResult"/>
            <result-type name="stream" class="org.apache.struts2.dispatcher.StreamResult"/>
            <result-type name="velocity" class="org.apache.struts2.dispatcher.VelocityResult"/>
            <result-type name="xslt" class="org.apache.struts2.views.xslt.XSLTResult"/>
            <result-type name="plainText" class="org.apache.struts2.dispatcher.PlainTextResult" />
</result-types>

示例action

/**
 * ResultTypeAction
 */
public class ResultTypeAction extends ActionSupport {
	private static final long serialVersionUID = -6933309304624396640L;

	private String name = "中文" ;

	private String saveFileName ;

	/**
	 * 只能请求转发到jsp或者是servlet.
	 */
	public String dispatcher() {
		System.out.println("dispatcher");

		return "dispatcher";
	}

	/**
	 * 重定向到任意的url.
	 */
	public String redirect() {
		System.out.println("redirect");
		return "redirect";
	}

	/**
	 * 重定向action的好处在于不需要硬编码url地址,即不需要绑定url模式.只能重定向到当前应用中的
	 * 某个action.
	 */
	public String redirectAction() {
		System.out.println("redirectAction");
		return "redirectAction";
	}

	/**
	 * 得到输入流
	 * @throws FileNotFoundException
	 */
	public InputStream getIs() throws FileNotFoundException{
		return new FileInputStream("d:/sunset.jpg");
	}

	/**
	 * 下载
	 */
	public String stream(){
		try {
			saveFileName = URLEncoder.encode("日落", "UTF-8");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		return "stream" ;
	}

	/**
	 * 链化action,请求转发到另外一个action,在同一个线程中,数据共享
	 */
	public String chain(){
		System.out.println("chain");
		return "chain" ;
	}

	/**
	 * 输出纯文本
	 */
	public String plainText(){
		System.out.println("plainText");
		return "plainText" ;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getSaveFileName() {
		return saveFileName;
	}

	public void setSaveFileName(String saveFileName) {
		this.saveFileName = saveFileName;
	}
}

struts配置文档  rt.xml

<?xml version="1.0"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"
    "http://struts.apache.org/dtds/struts-2.1.7.dtd">
<struts>
    <package name="RtPkg" namespace="/rt" extends="struts-default">
        <action name="ResultTypeAction_*" class="cn.itcast.struts2.resulttype.ResultTypeAction" method="{1}">
            <result name="dispatcher" type="dispatcher">/login.jsp</result>
			<!--调用action中的数据 用 ${...}-->
            <result name="redirect" type="redirect">/ui/UiAction_saveData.do?name=${name}</result>
            <result name="redirectAction" type="redirectAction">
                <param name="actionName">UiAction_saveData</param>
                <param name="namespace">/ui</param>
                <param name="name">${name}</param>
                <param name="age">20</param>
            </result>
            <result name="stream" type="stream">
                <param name="contentType">image/jpeg</param>
                <param name="contentDisposition">
                    attachment;filename="${@java.net.URLEncoder@encode('日落', 'UTF-8')}.jpg"
                </param>
                <param name="inputName">is</param>
            </result>
            <result name="chain" type="chain">
                <param name="actionName">UiAction_saveData</param>
                <param name="namespace">/ui</param>
            </result>
            <result name="plainText" type="plainText">
                <param name="location">/ipmsg.log</param>
                <param name="charSet">GBK</param>
            </result>
        </action>
    </package>
</struts>

2. 国际化

显示页面

<%@ page language="java" contentType="text/html; charset=utf-8"%>
<%@taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<title>reg.jsp</title>
	</head>
	<body>
		<s:form namespace="/i18n" action="I18nAction_toRegView" method="post" theme="xhtml">
			<!--国际化显示语言选择-->
			<s:select name="request_locale"
					  list="#{@java.util.Locale@CHINA:@java.util.Locale@CHINA.getDisplayName(@java.util.Locale@CHINA),
							@java.util.Locale@TAIWAN:@java.util.Locale@TAIWAN.getDisplayName(@java.util.Locale@TAIWAN),
							@java.util.Locale@US:@java.util.Locale@US.getDisplayName(@java.util.Locale@US),
							@java.util.Locale@UK:@java.util.Locale@UK.getDisplayName(@java.util.Locale@UK),
							@java.util.Locale@JAPAN:@java.util.Locale@JAPAN.getDisplayName(@java.util.Locale@JAPAN)}"
					  listKey="key"
					  listValue="value"
					  onchange="this.form.submit();"
					  value="locale">
			</s:select>
			<!--国际化显示 提示信息-->
			<s:textfield name="name" key="label.name" />
			<s:submit />
		</s:form>
	</body>
</html>

语言资源文件放在action同目录下， 命名格式 action同名 + 国家代码 + 语言代码

I18nAction_zh_CN.properties

label.name=userName_zh_CN

I18nAction_en_US.properties

label.name=userName_en_US