In this example, we are going to use jersey for
invoking "Hello Jersey" mentioned in different formats like :
a. HTML
b. Plain Text
c. XML
for this example we will create 4 files:
- HelloJersey_DifferentFormat.java
- web.xml
- HelloJerseyClientCode.java
HelloWorld_DifferentFormat.java
package
com.tushar.jersey.Project;
import
javax.ws.rs.GET;
import
javax.ws.rs.Path;
import
javax.ws.rs.Produces;
import
javax.ws.rs.core.MediaType;
@Path("helloFormat")
public
class HelloJersey_DifferentFormat{
@GET
@Produces(MediaType.TEXT_PLAIN)
public String sayPlainTextHello() {
return "Hello JerseyThis is plain
text";
}
@GET
@Produces(MediaType.TEXT_XML)
public String sayXMLHello() {
return "<?xml
version=\"1.0\"?>" + "<hello> Hello Jersey , xml version"
+ "</hello>";
}
@GET
@Produces(MediaType.TEXT_HTML)
public String sayHTMLHello() {
return "<html> " +
"<title>" + "Hello Jersey" +
"</title>" + "<body><h1>" + "Hello
Jersey This is an HTML Page!" + "</body></h1>" +
"</html> ";
}
}
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WEB.xml
<?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_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>com.tushar.jersey.Project</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-serlvet</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>com.tushar.jersey.Project</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>jersey-serlvet</servlet-name>
<url-pattern>/rest/*</url-pattern>
</servlet-mapping>
</web-app>
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Run your rest service
Start the server and You
should be able to access your resources under the following URL:
http://localhost:8080/com.tushar.jersey.Project/rest/helloFormat
Output
The browser will always request the HTML MIME type.
For invoking Plain Text and xml we will create a client code.
Client Code.java :
For invoking Plain Text and xml we will create a client code.
Client Code.java :
The ClientCode.java file is
created inside the server application. But you can run client code by other
application also by having service interface and jersey jar file.
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package com.tushar.jersey.Project;
import java.net.URI;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.UriBuilder;
import org.glassfish.jersey.client.ClientConfig;
public class ClientCode
{
public static void main(String[]
args) {
ClientConfig config = new ClientConfig();
Client client = ClientBuilder.newClient(config);
WebTarget target = client.target(getBaseURI());
//Now
printing the server code of different media type
System.out.println(target.path("rest").path("helloFormat").request().accept(MediaType.TEXT_PLAIN).get(String.class));
System.out.println(target.path("rest").path("helloFormat").request().accept(MediaType.TEXT_XML).get(String.class));
System.out.println(target.path("rest").path("helloFormat").request().accept(MediaType.TEXT_HTML).get(String.class));
}
private static URI
getBaseURI() {
//here
server is running on 8080 port number and project name is
com.tushar.jersey.Project
return UriBuilder.fromUri("http://localhost:8080/com.tushar.jersey.Project").build();
}
}
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