Tomcat、JAX-RS、Jersey、@PathParam:如何传递点和斜线? [英] Tomcat, JAX-RS, Jersey, @PathParam: how to pass dots and slashes?

问题描述

有这样的方法:

@GET @Path("/name/{name}")
@Produces(MediaType.TEXT_PLAIN)
public String getProperty(@PathParam("name") String name) {
        System.out.println(name);
}

如何传递test./test"之类的值?

How do I pass a value like "test./test"?

/name/test./test     gives HTTP 404
/name/test.%2Ftest   gives HTTP 400
/name/test.%252Ftest prints test%2Ftest

但如果我这样做 name = URLDecoder.decode(name); 它会打印 /test 并且 test. 的第一部分会消失.

But if I do name = URLDecoder.decode(name); it prints /test and the first part of test. disappears.

已经有一两个这样的问题了，但是它们太老了，没有找到好的解决方案，我想我会再问一次.

There is one or two questions like this already but they are old and there was no good solution found, I thought I'll ask again.

推荐答案

@Path 注解中的模式在内部被转换为正则表达式，模板部分默认只匹配选定的字符.特别是，它们通常不匹配 / 字符；这几乎总是正确的做法(因为它可以让您将模板放在路径的一部分)但在这种情况下，您不想使用 整个 后续路径.要获得所有内容，我们必须覆盖该特定模板的正则表达式片段；这实际上很简单，因为我们只是在模板片段中放入了一个 :，然后是我们想要使用的 RE:

The pattern in the @Path annotation is internally turned into a regular expression, with the template parts matching only selected characters by default. In particular, they normally don't match / characters; that's almost always the right thing to do (as it lets you put templates part way through a path) but in this case it isn't as you're wanting to consume the whole subsequent path. To get everything, we have to override the regular expression fragment for that particular template; this is actually pretty easy, since we just put in the template fragment a : followed by the RE that we want to use:

@GET @Produces(MediaType.TEXT_PLAIN)
@Path("/name/{name:.+}")
public String getProperty(@PathParam("name") String name) {
    return name;
}

这将匹配 /name/ 之后的所有字符(最多但不包括任何 ? 查询部分)，但仅在有内容时才会匹配.请注意，如果您有任何其他 @Path("/name/...") 事情，事情会变得非常混乱！所以不要那样做.

This will match all characters after the /name/ (up to but not including any ? query part) but will only match if there's something there at all. Be aware that if you have any other @Path("/name/...") things about, things can get really confusing! So don't do that.

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