为什么不能叫这个简单的网络服务？
[英]Why can't I call this simple web service?
问题描述
I have created a web project on Eclipse with one class: "HelloWorld.java", that it's supposed to have a method that answers GET requests. 
我已经在Eclipse上使用一个类“ HelloWorld.java”创建了一个Web项目，该项目应该具有一种可以回答GET请求的方法。
package javaeetutorial.hello;
// imports
@Path("base")
public class HelloWorld extends HttpServlet {
public HelloWorld() {
}
@GET
@Produces("text/html")
public String getHtml() {
return "<html lang=\"en\"><body><h1>Hello, World!!</h1></body></html>";
}
}
Then, in the WebContent folder, in the WEB-INF directory, I have created a web.xml file with the following content in order to map requests to the /hello url to my servlet. 然后，在WebContent文件夹的WEB-INF目录中，我创建了一个web.xml文件，其中包含以下内容，以便将对/ hello url的请求映射到我的servlet。
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
metadata-complete="true"
version="3.1">
<servlet>
<servlet-name>hello</servlet-name>
<servlet-class>javaeetutorial.hello.HelloWorld</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>hello</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>
</web-app>
I export the project to a .war file and then I deploy it with Glassfish, but when I call the URL that supposedly calls my web service it shows me "The requested resource () is not available". 我将项目导出到.war文件，然后使用Glassfish进行部署，但是当我调用应该调用我的Web服务的URL时，它将显示“请求的资源（）不可用”。
The URL I am calling is: http://localhost:8080/Calculator/hello/base 我正在调用的URL是： http：// localhost：8080 / Calculator / hello / base
Why is my web service not being called? 为什么没有调用我的Web服务？
1 个解决方案
解决方案1
0 已采纳 2018-11-29 17:57:56
As VGR pointed out in the comments, I was confusing JAX-RS with Servlets. 正如VGR在评论中指出的那样，我将JAX-RS与Servlet混淆了。
I chose to go with the servlet route. 我选择使用servlet路由。 I removed all annotations and replaced my getHTML method with an override of the doGet method of HttpServlet. 我删除了所有注释并将getHTML方法替换为HttpServlet的doGet方法的替代。 Everything is working now as expected. 现在一切都按预期工作。
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