我使用Jersey和Jackson在Glassfish 3.1.2下运行RESTful Web服务:
@Stateless
@LocalBean
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
@Path("users")
public class UserRestService {
private static final Logger log = ...;
@GET
@Path("{userId:[0-9]+}")
public User getUser(@PathParam("userId") Long userId) {
User user;
user = loadUserByIdAndThrowApplicableWebApplicationExceptionIfNotFound(userId);
return user;
}
}
对于预期的异常,我抛出适当的WebApplicationException,我对发生意外异常时返回的HTTP 500状态感到满意.
我现在想为这些意外的异常添加日志记录,但是尽管搜索,但是无法找到我应该如何处理这个问题.
我已经尝试使用a Thread.UncaughtExceptionHandler并且可以确认它是在方法体内应用的,但是它的uncaughtException方法永远不会被调用,因为其他东西在它们到达我的处理程序之前处理未捕获的异常.
我见过一些人使用的另一个选项是ExceptionMapper,它捕获所有异常,然后过滤掉WebApplicationExceptions:
@Provider
public class ExampleExceptionMapper implements ExceptionMapper<Throwable> {
private static final Logger log = ...;
public Response toResponse(Throwable t) {
if (t instanceof WebApplicationException) {
return ((WebApplicationException)t).getResponse();
} …我正在尝试使用Spring 4.1.9和Thymeleaf 2.1.5来呈现XHTML Basic 1.1页面,其中包含以下序言:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN"
"http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
仅仅在模板中使用它不起作用,因为Thymeleaf不识别doctype.
org.thymeleaf.exceptions.TemplateProcessingException:与PUBLICID请求不支持的实体" - // W3C // DTD XHTML 1.1的基本// EN"和SYSTEMID" http://www.w3.org/TR/xhtml-basic/xhtml-basic11 .dtd ".确保您的方言提供了相应的org.thymeleaf.doctype.resolution.IDocTypeResolutionEntry实现(索引:1)
我浏览了Thymeleaf 扩展文档和源代码,并以此为出发点,定义了一个继承自SpringStandardDialect的新方言.我通过反复试验找出了丢失的模块,从w3.org下载并将它们添加到我项目的资源目录中:
import java.util.LinkedHashSet;
import java.util.Set;
import org.thymeleaf.doctype.DocTypeIdentifier;
import org.thymeleaf.doctype.resolution.ClassLoaderDocTypeResolutionEntry;
import org.thymeleaf.doctype.resolution.IDocTypeResolutionEntry;
import org.thymeleaf.spring4.dialect.SpringStandardDialect;
public class XhtmlBasicDialect extends SpringStandardDialect {
private static final String DTD_STANDARD_PATH = "org/thymeleaf/dtd/standard/";
private static final DocTypeIdentifier XHTML_BASIC_11_PUBLICID = DocTypeIdentifier.forValue("-//W3C//DTD XHTML Basic 1.1//EN");
private static final DocTypeIdentifier XHTML_BASIC_11_SYSTEMID = …学习如何利用Bootstrap,我注意到缩略图的图像源有奇怪的标记(至少对我来说很奇怪).
<img data-src="holder.js/260x120" alt="260x120" style="width: 260px; height: 120px;" src="data:image/png;base64,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">
这里发生了什么,为什么要这样做？在base64中的某个时刻图像是否以某种方式保存到本地存储？
为了澄清,我问的是这个src="image:/部分.