[英]Java: REST service URL mapping
I am trying to create a very simple REST web service using Java, but I can't get the mapping right... 我正在尝试使用Java创建一个非常简单的REST Web服务,但是我无法正确映射。
This is my service: 这是我的服务:
package rest;
@Path("/square/{num}")
public class SquareNumberRest {
@GET
@Produces(MediaType.APPLICATION_JSON)
public String squareNum(@PathParam("num") String num) {
int n = Integer.parseInt(num);
int squared = n * n;
JSONObject jo = new JSONObject(squared);
return jo.toString();
}
}
My web.xml descriptor: 我的web.xml描述符:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>TestProject</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>Jersey REST Service</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>rest</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey REST Service</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
I try to consume the service on the following URL: http://localhost:8080/MyProjectName/square/3 我尝试在以下URL上使用该服务: http:// localhost:8080 / MyProjectName / square / 3
but I'm getting a 404 error. 但出现404错误。
Did you define the URL context for the project? 您是否为项目定义了URL上下文? It's possible that the URL root for the project is right on localhost:8080, which means you'll need to do 该项目的URL根目录可能就在localhost:8080上,这意味着您需要
http://localhost:8080/square/3 instead. http:// localhost:8080 / square / 3代替。
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