Question

我正在将Velocity与Jersey集成，我正面临着资源工具i18n的问题。

整合完成如下：

web.xml （条纹，与相关部分保持一致）：

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
   <context-param>
      <param-name>contextConfiguration</param-name>
      <param-value>classpath:applicationContext.xml</param-value>
   <context-param>
   <filter>
      <filter-name>velocity-filter</filter-name>
      <filter-class>org.apache.velocity.tools.view.VelocityViewFilter</filter-class>
   </filter>
   <filter-mapping>
      <filter-name>velocity-filter</filter-name>
      <servlet-name>rest-servlet</servlet-name>
   </filter-mapping>
   <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
   </listener>
   <servlet>
      <servlet-name>rest-servlet</servlet-name>
      <servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>
      <init-param>
         <param-name>com.sun.jersey.config.property.packages</param-name>
         <param-value>my.package.demo</param-value>
      </init-param>
      <load-on-startup>1</load-on-startup>
   </servlet>
   <servlet-mapping>
      <servlet-name>rest-servlet</servlet-name>
      <url-pattern>/rest/*</url-pattern>
   </servlet-mapping>
</web-app>

现在，我的 tools.xml （在WEB-INF文件夹中）：

<?xml version="1.0" encoding="UTF-8"?>                                               
<tools>                                                                              
    <data type="boolean" key="STRUTS_TOOLS_AVAILABLE" value="false"/>                
    <toolbox scope="request">                                                        
        <tool class="org.apache.velocity.tools.generic.ResourceTool"                 
            bundles="my.package.demo.Resource" />                               
    </toolbox>                                                                       
</tools>

然后我创建了一个基本的 VelocityTemplateProcessor

package my.package.demo;

import static com.google.common.base.Strings.isNullOrEmpty;

import java.io.IOException;
import java.io.OutputStream;
import java.io.StringWriter;
import java.io.Writer;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.Provider;

import org.apache.velocity.Template;
import org.apache.velocity.exception.ResourceNotFoundException;
import org.apache.velocity.tools.ToolContext;
import org.apache.velocity.tools.view.ServletUtils;
import org.apache.velocity.tools.view.VelocityView;

import com.sun.jersey.api.core.HttpContext;
import com.sun.jersey.api.view.Viewable;
import com.sun.jersey.spi.template.ViewProcessor;

@Provider
public class VelocityTemplateProcessor implements ViewProcessor<Template> {

    private static Map<MediaType, String> fileExtension;

    static {
        fileExtension = new HashMap<>();
        fileExtension.put(MediaType.TEXT_HTML_TYPE, ".html.vm");
        fileExtension.put(MediaType.APPLICATION_JSON_TYPE, ".json.vm");
        fileExtension.put(MediaType.APPLICATION_XML_TYPE, ".xml.vm");
    }

    @Context
    private HttpContext httpContext;

    private final VelocityView velocityView;

    public VelocityTemplateProcessor(@Context final ServletContext servletContext) {
        velocityView = ServletUtils.getVelocityView(servletContext);
    }

    @Override
    public Template resolve(final String name) {
        if (isNullOrEmpty(name)) {
            return null;
        }
        final MediaType mediaType = httpContext.getResponse().getMediaType();
        final String extension = fileExtension.get(mediaType);
        if (isNullOrEmpty(extension)) {
            return null;
        }
        try {
            return velocityView.getTemplate(name + extension);
        } catch (final ResourceNotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    public void writeTo(final Template t, final Viewable viewable, final OutputStream out) throws IOException {
        final ToolContext context = velocityView.createContext();
        context.put("data", viewable.getModel());
        final Writer writer = new StringWriter();
        t.merge(context, writer);
        out.write(writer.toString().getBytes());
    }

}

除了ResourceTool之外，这很有效。它似乎正确加载了所请求的配置（至少，它在ToolContext中的显示方式），但是，当我尝试在模板中调用$text.my.property时，似乎它使用具有默认配置的ResourceTool（使用名为“resources”的包，然后找不到我的密钥它在我明确提到$text.bundle('my.package.demo.Resource').my.property时有效，但我想让管理模板的人们更加透明。

Answer 1

没关系。我找到了。我必须使用ToolContext和HttpServletRequest创建HttpServletResponse。两者都注入了@Context。现在就像一个魅力。

Velocity与Jersey的集成，ResourceTool没有正确初始化

1 个答案: