Java Spring项目国际化(i18n)详细方法与实例

<!-- 定义本地化变更拦截器 -->
<bean id="localeChangeInterceptor" class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor" />
<!-- 定义注解URL映射处理器，所有的请求映射关联本地化拦截器，或者也可自定义该拦截器路径映射-->
<bean id="urlMapping" class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
 <property name="interceptors" ref=" localeChangeInterceptor " />
 <property name="order" value="1"></property>
</bean>

<a href="xxx.do?locale=zh_CN" rel="external nofollow" >中文</a>或<a href="xxx.do?locale=en" rel="external nofollow" >英文</a>
<bean id="localeResolver" class="org.springframework.web.servlet.i18n.AcceptHeaderLocaleResolver"/>

public class MyLocaleResolver extends AcceptHeaderLocaleResolver {
 private Locale myLocal;
 
public Locale resolveLocale(HttpServletRequest request) {
 return myLocal == null ? request.getLocale() : myLocal;
}
 
public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
 myLocal = locale;
 }
}

<bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver"/>

<bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver" />

<!-- 默认的注解映射的支持 -->
<mvc:annotation-driven validator="validator" conversion-service="conversionService" />
<!-- 资源文件 -->
<bean id="propertiesMessageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
 <property name="basenames">
 <list>
 <value>resource</value>
 <value>validation</value>
 </list>
 </property>
</bean>
 
<bean id="databaseMessageSource" class="com.obs2.util.MessageResource">
 <property name="parentMessageSource" ref="propertiesMessageSource"/>
</bean>
 
<bean id="messageInterpolator" class="com.obs2.util.MessageResourceInterpolator">
 <property name="messageResource" ref="databaseMessageSource"/>
</bean>
 
<!-- 验证器 -->
<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
 <property name="messageInterpolator" ref="messageInterpolator"/>
</bean>

@Entity
@SuppressWarnings("serial")
@Table(name="resource")
 
public class Resource implements Serializable {
 @Id
 @GeneratedValue(strategy=GenerationType.IDENTITY)
 @Column(name="resource_id")
 private long resourceId;
 
 @Column(name="name", length=50, nullable=false)
 private String name;
 
 @Column(name="text", length=1000, nullable=false)
 private String text;
 
 @Column(name="language", length=5, nullable=false)
 private String language;
 
 public long getResourceId() {
 return resourceId;
 }
 
 public void setResourceId(long resourceId) {
 this.resourceId = resourceId;
 }
 
 public String getName() {
 return name;
 }
 
 public void setName(String name) {
 this.name = name;
 }
 
 public String getText() {
 return text;
 }
 
 public void setText(String text) {
 this.text = text;
}
 
 public String getLanguage() {
 return language;
 }
 
 public void setLanguage(String language) {
 this.language = language;
 }
}

/**
* 取得资源数据
* @author Robin
*/
public class MessageResource extends AbstractMessageSource implements ResourceLoaderAware {
 
 @SuppressWarnings("unused")
 private ResourceLoader resourceLoader;
 
 @Resource
 private ResourceService resourceService;
 /**
 * Map切分字符
 */
 protected final String MAP_SPLIT_CODE = "|";
 protected final String DB_SPLIT_CODE = "_";
 
 private final Map<String, String> properties = new HashMap<String, String>();
 
 public MessageResource() {
 reload();
 }
 
 public void reload() {
 properties.clear();
 properties.putAll(loadTexts());
 }
 
 protected Map<String, String> loadTexts() {
 Map<String, String> mapResource = new HashMap<String, String>();
 List<com.obs2.service.bean.Resource> resources = resourceService.findAll();
 for (com.obs2.service.bean.Resource item : resources) {
 String code = item.getName() + MAP_SPLIT_CODE + item.getLanguage();
 mapResource.put(code, item.getText());
 }
 
 return mapResource;
 }
 
 private String getText(String code, Locale locale) {
 String localeCode = locale.getLanguage() + DB_SPLIT_CODE + locale.getCountry();
 String key = code + MAP_SPLIT_CODE + localeCode;
 String localeText = properties.get(key);
 String resourceText = code;
 if(localeText != null) {
  resourceText = localeText;
 }else {
  localeCode = Locale.ENGLISH.getLanguage();
  key = code + MAP_SPLIT_CODE + localeCode;
  localeText = properties.get(key);
  if(localeText != null) {
  resourceText = localeText;
  }else {
  try {
   if(getParentMessageSource() != null) {
   resourceText = getParentMessageSource().getMessage(code, null, locale);
   }
  } catch (Exception e) {
   logger.error("Cannot find message with code: " + code);
  }
  }
 }
 return resourceText;
 }
 
 @Override
 public void setResourceLoader(ResourceLoader resourceLoader) {
 this.resourceLoader = (resourceLoader != null ? resourceLoader : new DefaultResourceLoader());
 }
 
 @Override
 protected MessageFormat resolveCode(String code, Locale locale) {
 String msg = getText(code, locale);
 MessageFormat result = createMessageFormat(msg, locale);
 return result;
 }
 
 @Override
 protected String resolveCodeWithoutArguments(String code, Locale locale) {
 String result = getText(code, locale);
 return result;
 }
}

/**
* 系统启动监听
* @author Robin
*/
public class SystemListener implements ServletContextListener {
/**
* context初始化时激发
*/
@Override
public void contextInitialized(ServletContextEvent e) {
// 取得ServletContext
ServletContext context = e.getServletContext();
WebApplicationContext applicationContext = WebApplicationContextUtils .getWebApplicationContext(context);
// 设置国际化多语言
MessageResource messageSource = applicationContext.getBean(MessageResource.class);
 messageSource.reload();
}
 
/**
* context删除时激发
*/
@Override
public void contextDestroyed(ServletContextEvent e) {
}
 
/**
* 创建一个 session时激发
* @param e
*/
 
public void sessionCreated(HttpSessionEvent e) {
}
 
/**
* 当一个 session失效时激发
* @param e
*
public void sessionDestroyed(HttpSessionEvent e) {
}
/**
* 设置 context的属性，它将激发attributeReplaced或attributeAdded方法
* @param e
*/
public void setContext(HttpSessionEvent e) {
}
 
/**
* 增加一个新的属性时激发
* @param e
*/
public void attributeAdded(ServletContextAttributeEvent e) {
}
 
/**
*删除一个新的属性时激发
* @param e
*/
 
public void attributeRemoved(ServletContextAttributeEvent e) {
 
}
 
/*
* 属性被替代时激发
* @param e
*/
public void attributeReplaced(ServletContextAttributeEvent e) {
}
}

<!-- 系统启动监听 -->
<listener>
 <listener-class>com.obs2.util.SystemListener</listener-class>
</listener>

/**
* 拦截Annotation验证信息
* @author Robin
*
*/
 
public class MessageResourceInterpolator implements MessageInterpolator {
@Resource
private MessageResource messageResource;
 
public void setMessageResource(MessageResource messageResource) {
 this.messageResource = messageResource;
}
 
@Override
public String interpolate(String messageTemplate, Context context) {
 
String messageTemp = null;
 if(messageTemplate.startsWith("{") && messageTemplate.endsWith("}")) {
 messageTemp = messageTemplate.substring(1, messageTemplate.length() - 1);
 }else {
 return messageTemplate;
 }
 
 String[] params = (String[]) context.getConstraintDescriptor().getAttributes().get("params");
 MessageBuilder builder = new MessageBuilder().code(messageTemp);
 
 if (params != null) {
 for (String param : params) {
 builder = builder.arg(param);
 }
 
 }
 
 String result = builder.build().resolveMessage(messageResource, Locale.ENGLISH).getText();
 return result;
 
 }
 
@Override
public String interpolate(String messageTemplate, Context context, Locale locale) {
 
 String messageTemp = null;
 if(messageTemplate.startsWith("{") && messageTemplate.endsWith("}")) {
 messageTemp = messageTemplate.substring(1, messageTemplate.length() - 1);
 }else {
 return messageTemplate;
 }
 
 String[] params = (String[]) context.getConstraintDescriptor().getAttributes().get("params");
 
 MessageBuilder builder = new MessageBuilder().code(messageTemp);
 if (params != null) {
 builder = builder.args(params);
 }
 
 String result = builder.build().resolveMessage(messageResource, locale).getText();
 
 return result
 }
 
}

<!-- 资源文件绑定器，文件名称：messages.properties（没有找到时的默认文件）， messages_en.properties（英文），messages_zh_CN.properties（中文），等等-->
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
 <property name="basename" value="config.messages.messages" />
 <property name="defaultEncoding" value="UTF-8"/>
 <property name="basename" value="i18n.messages"/>
 <property name="useCodeAsDefaultMessage" value="true" />
</bean>

<bean id=" messageSource "
class="org.springframework.context.support.ResourceBundleMessageSource">
 <!--①通过基名指定资源，相对于类根路径-->
 <property name="basenames">
 <list>
 <value>com/baobaotao/i18n/fmt_resource</value>
 </list>
 </property>
 </bean>

<bean id="messageSource "
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
 <property name="basenames">
 <list>
 <value>com/baobaotao/i18n/fmt_resource</value>
 </list>
 </property>
 <!--①刷新资源文件的周期，以秒为单位-->
 <property name="cacheSeconds" value="5"/>
</bean>

<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>

<s:message code="test.app"/>
<spring:message code="main.title" />

<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt"%>

<fmt:message key="test.app"/>

@Autowired
private MessageSource messageSource;
String s = messageSource.getMessage("SystemError", new Object[]{}, Locale.US);

WebApplicationContext wac = ContextLoader.getCurrentWebApplicationContext();

String[] configs = {"com/baobaotao/i18n/beans.xml"};
ApplicationContext ctx = new ClassPathXmlApplicationContext(configs);

MessageSource ms = (MessageSource) wac.getBean("myResource");
Object[] params = {"John", new GregorianCalendar().getTime()};
String str1 = ms.getMessage("greeting.common",params,Locale.US);

<!--注册资源Bean,其Bean名称只能为messageSource -->
<bean id="messageSource"
 class="org.springframework.context.support.ResourceBundleMessageSource">
 <property name="basenames">
 <list>
 <value>com/baobaotao/i18n/fmt_resource</value>
 </list>
 </property>
</bean>

WebApplicationContext wac = ContextLoader.getCurrentWebApplicationContext();

String[] configs = {"com/baobaotao/i18n/beans.xml"};
ApplicationContext ctx = new ClassPathXmlApplicationContext(configs);

Object[] params = {"John", new GregorianCalendar().getTime()};
String str1 = ctx.getMessage("greeting.common",params,Locale.US);

JAVA_HOME\bin\native2ascii -encoding UTF-8 messages_zh_CN.properties messages_zh_C1N.properties