[英]Java Jersey Rest : No provider classes found. (404 error when accessing URL)
[英]Java - Accessing Tomcat/Jersey url gives 404 Not Found
在過去的兩個小時中,我一直在為此苦苦掙扎。 我看過許多不同的StackOverflow答案(很多問題看起來像這樣),但是沒有一個對我有用。
我有一個簡單的'CountryResources'類,它使用@Path("/countries")
,但是當我導航到localhost:8080/restservices/countries
,只給了我404錯誤。
CountryResource類,位於worldmap.services包中:
package worldmap.services;
import model.Country;
import model.CountryService;
import model.ServiceProvider;
import javax.json.Json;
import javax.json.JsonArray;
import javax.json.JsonArrayBuilder;
import javax.json.JsonObjectBuilder;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
@Path("/countries")
public class CountryResource {
@GET
@Produces("application/json")
public String getCountries() {
System.out.println("Opgehaald");
CountryService cs = ServiceProvider.getWorldService();
JsonArrayBuilder jab = Json.createArrayBuilder();
for(Country c : cs.getAllCountries()) {
JsonObjectBuilder job = Json.createObjectBuilder();
job.add("code", c.getCode());
job.add("name", c.getName());
job.add("continent", c.getContinent());
job.add("region", c.getRegion());
job.add("surface", c.getSurface());
job.add("population", c.getPopulation());
job.add("government", c.getGovernment());
jab.add(job);
}
JsonArray array = jab.build();
return array.toString();
}
}
Web XML:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
metadata-complete="false">
<servlet>
<servlet-name>Jersey REST Service</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>worldmap.services</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey REST Service</servlet-name>
<url-pattern>/restservices/*</url-pattern>
</servlet-mapping>
</web-app>
已發現問題:Maven沒有將程序的依賴項復制到目標的lib文件夾中。 將不得不嘗試找出解決辦法。
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