[REST Jersey] @QueryParam Demo
HelloWorldResource.java
package com.example;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.DefaultValue;
/**
*
* @author
*/
@Path("helloworld")
public class HelloWorldResource {
public static final String CLICHED_MESSAGE = "Hello World!";
/*
@GET
@Produces("text/plain")
public String getHello() {
return CLICHED_MESSAGE;
}
*/
@GET
@Path("/get")
@Produces("text/plain")
//@Produces("application/json")
public String getQueryObj(
@QueryParam ("featureID") @DefaultValue("0") String fid,
@QueryParam ("userID") @DefaultValue( "0" ) int uid,
@QueryParam ("color") @DefaultValue("red") ColorParam clr
// color default value: green, blue
) {
return new String("QueryParam: {"+ fid + ": " + uid + " : " + clr + "}." + CLICHED_MESSAGE);
}
}
ColorParam.java
package com.example;
import java.awt.Color;
import javax.ws.rs.WebApplicationException;
import java.lang.reflect.Field;
public class ColorParam extends Color {
public ColorParam(String s) {
super(getRGB(s));
}
private static int getRGB(String s) {
if (s.charAt(0) == '#') {
try {
Color c = Color.decode("0x" + s.substring(1));
return c.getRGB();
} catch (NumberFormatException e) {
throw new WebApplicationException(400);
}
} else {
try {
Field f = Color.class.getField(s);
return ((Color)f.get(null)).getRGB();
} catch (Exception e) {
throw new WebApplicationException(400);
}
}
}
}
Call it after the above java files are packaged as a war deployed in tomcat container.
http://hostname:8080/易做图-service-webapp/webapi/helloworld/get?featureID=12
QueryParam: {12: 0 : com.example.ColorParam[r=255,g=0,b=0]}.Hello World!
http://hostname:8080/易做图-service-webapp/webapi/helloworld/get?featureID=12&userID=123
QueryParam: {12: 123 : com.example.ColorParam[r=255,g=0,b=0]}.Hello World!
http://hostname:8080/易做图-service-webapp/webapi/helloworld/get?
featureID=12&userID=123&color=yellow QueryParam: {12: 123 : com.example.ColorParam[r=255,g=255,b=0]}.Hello World!
补充：web前端 , HTML/CSS ,
