項目擴展koala i18n組件

時間 2019-12-23

標籤項目擴展 koala i18n 組件简体版

原文原文鏈接

i18n組件中I18nTag類默認是經過request.getLocale().toString()來獲取瀏覽器語言，實現用戶自由切換語言需改動以下： javascript

界面提供可切換的語言選擇
把要切換的語言存入session
標籤解析先從session獲取語言

提供語言選擇

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://www.openkoala.org/i18n" prefix="koala" %>
<!DOCTYPE html>
<html>
<head>
<title>I18N</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script src="/lib/jquery-1.8.3.min.js" type="text/javascript"></script>
</head>
<body>

<select id="langSelect">
					<option value="zh_CN">請選擇</option>
					<option value="zh_CN">中文</option>
					<option value="en_US">English</option>
				</select> 

I18N:<koala:i18n key="test" />

<script type="text/javascript">
	$(function(){
		$("#langSelect").change(function ()
                        { 
                            if (this.value)
                            {
                                $.post('${pageContext.request.contextPath}/international/switchLanguage.koala?locale=' + this.value).done(function(data){
                                	if(data.result == 'success'){
                                		window.location.reload();
                        			}else{
                        				alert("fail");
                        			}
                        		});
                            } else
                            {
                            }
                        });
		
	});

</script>

</body>
</html>

選中語言存入Session

建立I18NController類 html

package com.xiaokaceng.demo.web.controller;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/international")
public class I18NController {

	@ResponseBody
	@RequestMapping("/switchLanguage")
	public Map<String, Object> switchLanguage(String locale, HttpSession session) {
		if (locale == null || locale.isEmpty()) {
			session.setAttribute("locale", "zh_CN");
		} else {
			session.setAttribute("locale", locale);
		}
		Map<String, Object> result = new HashMap<String, Object>();
		result.put("result", "success");
		return result;
	}
}

擴展I18nTag類

package com.xiaokaceng.demo.web.tag;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.SimpleTagSupport;

import org.openkoala.framework.i18n.I18NManager;

public class I18nTag extends SimpleTagSupport {

	private String key;
	private String locale;

	public void setKey(String key) {
		this.key = key;
	}

	public void setLocale(String locale) {
		this.locale = locale;
	}

	public void doTag() throws JspException, IOException {
		String message = null;

		HttpServletRequest request = (HttpServletRequest) ((PageContext) getJspContext()).getRequest();

		try {
			if (this.locale == null) {
				this.locale = (String) request.getSession().getAttribute("locale");
			}
			if (this.locale == null) {
				message = I18NManager.getMessage(this.key, request.getLocale().toString());
			} else {
				message = I18NManager.getMessage(this.key, this.locale);
			}
		} catch (Exception e) {
			message = this.key;
			e.printStackTrace();
		}

		getJspContext().getOut().write(message);
	}
}

配置i18n.tld元素<tag-class>com.xiaokaceng.demo.web.tag.I18nTag</tag-class>