JBoss Resteasy 2之URL匹配

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在上一篇helloworld中，简单介绍了入门，本文讲解其URL匹配，也是REST
中很重要的一环
看例子：

Java代码

@Path("/users")
public class UserRestService {
@GET
@Path("{name}")
public Response getUserByName(@PathParam("name") String name) {
return Response.status(200)
.entity("getUserByName is called, name : " + name).build();
}
@GET
@Path("{id : \\d+}") //support digit only
public Response getUserById(@PathParam("id") String id) {
return Response.status(200).entity("getUserById is called, id : " + id).build();
}
@GET
@Path("/username/{username : [a-zA-Z][a-zA-Z_0-9]}")
public Response getUserByUserName(@PathParam("username") String username) {
return Response.status(200)
.entity("getUserByUserName is called, username : " + username).build();
}
@GET
@Path("/books/{isbn : \\d+}")
public Response getUserBookByISBN(@PathParam("isbn") String isbn) {
return Response.status(200)
.entity("getUserBookByISBN is called, isbn : " + isbn).build();
}

@Path("/users")public class UserRestService { @GET@Path("{name}")public Response getUserByName(@PathParam("name") String name) { return Response.status(200).entity("getUserByName is called, name : " + name).build(); }@GET@Path("{id : \\d+}") //support digit onlypublic Response getUserById(@PathParam("id") String id) {    return Response.status(200).entity("getUserById is called, id : " + id).build(); } @GET@Path("/username/{username : [a-zA-Z][a-zA-Z_0-9]}")public Response getUserByUserName(@PathParam("username") String username) {    return Response.status(200).entity("getUserByUserName is called, username : " + username).build(); } @GET@Path("/books/{isbn : \\d+}")public Response getUserBookByISBN(@PathParam("isbn") String isbn) {    return Response.status(200).entity("getUserBookByISBN is called, isbn : " + isbn).build(); }

可以看到，还支持正则表达式。所以，容易看出：

1） “/users/999”
返回：getUserById is called, id : 999

2） /users/username/aaa”
不匹配

3） users/books/999”
返回：getUserBookByISBN is called, isbn : 999

再看例子：

Java代码

@Path("/users")
public class UserRestService {
@GET
@Path("{id}")
public Response getUserById(@PathParam("id") String id) {
return Response.status(200).entity("getUserById is called, id : " + id).build();
}

@Path("/users")public class UserRestService { @GET@Path("{id}")public Response getUserById(@PathParam("id") String id) {    return Response.status(200).entity("getUserById is called, id : " + id).build(); }

则“/users/22667788 匹配
getUserById is called, id : 22667788

多个参数传入的例子：

Java代码

@Path("/users")
public class UserRestService {
@GET
@Path("{year}/{month}/{day}")
public Response getUserHistory(
@PathParam("year") int year,
@PathParam("month") int month,
@PathParam("day") int day) {
String date = year + "/" + month + "/" + day;
return Response.status(200)
.entity("getUserHistory is called, year/month/day : " + date)
.build();
}

@Path("/users")public class UserRestService { @GET@Path("{year}/{month}/{day}")public Response getUserHistory(@PathParam("year") int year,@PathParam("month") int month, @PathParam("day") int day) {    String date = year + "/" + month + "/" + day;    return Response.status(200).entity("getUserHistory is called, year/month/day : " + date).build(); }

则：
“/users/2011/06/30”
输出：
getUserHistory is called, year/month/day : 2011/6/30