Restful入门实战演练

由于工作需要，研究了一下Rest.

1.创建web应用，加入如下jar包。

2.创建Student实体

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name="student")
public class Student {
private int id;
private String name;

public Student(){}

public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

@Override
public String toString() {
return "Student [id=" + id + ", name=" + name + "]";
}

3.创建Resource

import java.util.Iterator;

import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;

import org.codehaus.jackson.map.deser.FromStringDeserializer;
import org.restlet.data.Form;
import org.restlet.data.Parameter;
import org.restlet.representation.Representation;

@Path("student")
public class StudentResource {

@GET
@Path("{id}/xml")
@Produces("application/xml")
public Student getStudentXml(@PathParam("id") int id) {

//路径为http://localhost:8085/student/1/xml
return ResourceServer.getDefaultStudent();
}

@GET
@Path("{id}/json")
@Produces("application/json")
public Student getStudentJson(@PathParam("id") int id) {

//路径为http://localhost:8085/student/1/json
return ResourceServer.findStudent(id);
}

@GET
@Path("delete/{name}")
public void delete(@PathParam("name") String name){

//路径为http://localhost:8085/student/delete/小王
  System.out.println("和数据库交互，删除name 为"+name +"的student");
}

@POST
@Path("update")
public void update(Representation data){
  //form表单通过Post将数据传过来。路径为http://localhost:8085/student/update/+form数据
  Form form =new Form(data);
  Iterator<Parameter>   it =form.iterator();
  Student   stu =new Student();
  while(it .hasNext()){
   Parameter p =it.next();
   String key =p.getName();
   String val =p.getValue();
   if("id".equals(key)){
    stu.setId(Integer.parseInt(val));

   }else if("name".equals(key)) {
    stu.setName(val);
   }
  }
  // 将student加入到数据库。
}

}

4 .创建Application

public class StudentApplication extends Application {

@Override
public Set<Class<?>> getClasses() {
  Set<Class<?>> rrcs = new HashSet<Class<?>>();
  rrcs.add(StudentResource.class);
  return rrcs;
}
}

5 创建Server 类，该类启动rest服务。

public class Server {
public static void main(String[] args) throws Exception {
  Component component = new Component();
  component.getServers().add(Protocol.HTTP, 8085);
  component.getDefaultHost().attach(new StudentApplication (new Context()));
  component.start();
}
}

启动该类，rest服务就被绑定在了8085端口。

查看： http://localhost:8085/student/1/xml

http://localhost:8085/student/1/json

其他功能以此类推。

实例项目提供下载。

Restful入门实战演练

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