基于HttpSession的国际化实现

红太狼 2022-10-01 00:39 156阅读 0赞

代码：

loginForm.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <%@taglib prefix= "form" uri= "http://www.springframework.org/tags/form" %>
    <%@taglib prefix= "spring" uri= "http://www.springframework.org/tags" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>测试基于SessionLocaleResolver的国际化</title>
    </head>
    <body>
    
    <a href="loginForm?request_locale=zh_CN">中文</a> | <a href="loginForm?request_locale=en_US">英文</a>
    <br/>
    <h3><spring:message code="title"/></h3>
    <form:form modelAttribute="user" method="post" action="login" >
    	<table>
    		<tr>
    			<td><spring:message code="loginname"/></td>
    			<td><form:input path="loginname"/></td>
    		</tr>
    		<tr>
    			<td><spring:message code="password"/></td>
    			<td><form:input path="password"/></td>
    		</tr>
    		<tr>
    			<td><input type="submit" value="<spring:message code="submit"/>"/></td>
    		</tr>
    	</table>
    </form:form>
    </body>
    </html>

success.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <%@taglib prefix= "spring" uri= "http://www.springframework.org/tags" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>测试ConversionService</title>
    </head>
    <body>
    <spring:message code="welcom" arguments="${requestScope.user.username}"/>
    </body>
    </html>

User.java

package com.bean;
    
    import java.io.Serializable;
    
    public class User implements Serializable {
    	private String loginname;
    	private String password;
    	private String username;
    	public User() {
    		super();
    		// TODO Auto-generated constructor stub
    	}
    	public String getLoginname() {
    		return loginname;
    	}
    	public void setLoginname(String loginname) {
    		this.loginname = loginname;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {
    		this.password = password;
    	}
    	public String getUsername() {
    		return username;
    	}
    	public void setUsername(String username) {
    		this.username = username;
    	}
    	@Override
    	public String toString() {
    		// TODO Auto-generated method stub
    		return "User [loginname=" + loginname + ", password=" + password + ", username=" + username + "]";
    	}
    	
    }

UserController.java

package com.control;
    
    import java.util.Locale;
    import javax.servlet.http.HttpServletRequest;
    import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;
    import com.bean.*;
    import org.springframework.context.i18n.LocaleContextHolder;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.validation.annotation.Validated;
    import org.springframework.web.bind.annotation.ModelAttribute;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.servlet.i18n.SessionLocaleResolver;
    import org.springframework.web.servlet.support.RequestContext;
    
    @Controller
    public class UserController{
    	private static final Log logger = LogFactory.getLog(UserController.class);
    	
    	@RequestMapping(value="/{formName}")
    	 public String loginForm(
    			 @PathVariable String formName,
    			 String request_locale,
    			 Model model,
    			 HttpServletRequest request){
    		System.out.println("request_locale = " + request_locale);
    		if(request_locale != null){
    			// 设置中文环境
    			if(request_locale.equals("zh_CN")){
    				Locale locale = new Locale("zh", "CN"); 
                    request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale); 
    			}
    			// 设置英文环境
    			else if(request_locale.equals("en_US")){
    				Locale locale = new Locale("en", "US"); 
                    request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,locale); 
    			}
    			// 使用之前的语言环境
    			else {
    				request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME,LocaleContextHolder.getLocale());
    			}      
    		}
    		User user = new User();
    		model.addAttribute("user",user);
    		// 动态跳转页面
    		return formName;
    	}
    	 
    	 @RequestMapping(value="/login",method=RequestMethod.POST)
    	 public String login(
    			 @ModelAttribute @Validated User user,
    			 Model model,
    			 HttpServletRequest request) {
    		 logger.info(user);
    		 if(user.getLoginname()!=null && user.getLoginname().equals("haige") && user.getPassword()!=null && user.getPassword().equals("123456")){
    			 //从后台代码获取国际化信息
    	         RequestContext requestContext = new RequestContext(request);
    	         String username = requestContext.getMessage("username");
    	         user.setUsername(username);
    			 model.addAttribute("user", user);
    		     return "success";
    		 }
    		 return "error";
    	 }
    
    }

截图：

![Center][]

![Center 1][]

![Center 2][]

[Center]: /images/20220705/1ca5cbfd512d4edbb9d93a1484225833.png
[Center 1]: /images/20220705/6088ca64597747e48f38be5d79814d02.png
[Center 2]: /images/20220705/6d82a83670574954a0e0b3e70f359805.png