1、相关说明
version：文中示例使用的Spring版本为3.0.3，Restlet版本为2.1.0。
entity：Student
2、创建Java Web工程，添加相关Jar。文中示例工程名为SpringRestlet。
说明：动态代理的cglib-nodep.jar不可缺少。
3、web.xml配置
dispatcherServlet org.springframework.web.servlet.DispatcherServlet contextConfigLocation classpath*:/applicationContext.xml org.springframework.web.context.ContextLoaderListener org.springframework.web.util.IntrospectorCleanupListener encodingFilter org.springframework.web.filter.CharacterEncodingFilter encoding UTF-8 forceEncoding true restlet org.restlet.ext.spring.SpringServerServlet org.restlet.application application restlet /*
4、Model实体类代码
@JsonSerialize(include = Inclusion.NON_NULL)public class Student { private Integer id; private String name; private Integer sex; private Integer age; public Student() { } /**setter/getter**/} 说明：@JsonSerialize(include = Inclusion.NON_NULL)为JackSon的注解，作用是返回JSON格式的实体时不返回该实体类值为Null的Field，如： {"id" : 1,"name" : null,"sex" : 1,"age" : 20} 。
5、Resource代码
(1)、StudentResource：示例中主要针对单个实例的Retrieve、Update和Delete。
@Controller@Scope("prototype")public class StudentResource extends ServerResource{ private Integer id; @Autowired private StudentBO studentBO; public void setStudentBO(StudentBO studentBO) { this.studentBO = studentBO; } @Override protected void doInit() throws ResourceException { id = Integer.valueOf((String) getRequestAttributes().get("studentId")); } @Get("json") public Student findStudentById(){ Student s = this.studentBO.getStudent(id); return s; } @Delete("json") public Integer deleteStudentById() { return this.studentBO.removeStudent(id); } @Put("json") public Integer updateStudent(Student student) { student.setId(id); return this.studentBO.saveOrUpdateStudent(student); }}
(2)、StudentListResource：示例中主要针对单个实例的Create和多个实例的Retrieve。
@Controller@Scope("prototype")public class StudentListResource extends ServerResource { @Autowired private StudentBO studentBO; @Post public Integer saveStudent(Student student) { return studentBO.saveOrUpdateStudent(student); } @Get("json") public List findStudentAll() { return studentBO.getStudentAll(); } public void setStudentBO(StudentBO studentBO) { this.studentBO = studentBO; }} 说明：接受Spring管理的Bean，@Scope("prototype")的annotation必须要有，否则会出现正确调用指定方法的问题，用xml配置Bean时也必须要Attribute:scope。
6、BusinessObject代码
@Service@Scope("prototype")public class StudentBO { private static Map students = new HashMap (); // next Id private static int nextId = 5; static { students.put(1, new Student(1, "Michael", 1, 18)); students.put(2, new Student(2, "Anthony", 1, 22)); students.put(3, new Student(3, "Isabella", 0, 19)); students.put(4, new Student(4, "Aiden", 1, 20)); } public Student getStudent(Integer id) { return students.get(id); } public List getStudentAll() { return new ArrayList (students.values()); } public Integer saveOrUpdateStudent(Student student) { if (student.getId() == null) { student.setId(nextId++); } students.put(student.getId(), student); return student.getId(); } public Integer removeStudent(Integer id) { students.remove(id); return id; }}
7、Spring applictionContext.xml配置
说明：该application在web.xml中引用
8、Client代码
public class StudentClient { public void student_get(){ try { ClientResource client = new ClientResource( "http://127.0.0.1:8080/SpringRestlet/student/1"); Representation representation = client.get(); System.out.println(representation.getText()); } catch (Exception e) { e.printStackTrace(); } } public void student_delete() { try { ClientResource client = new ClientResource( "http://127.0.0.1:8080/SpringRestlet/student/1"); Representation representation = client.delete(); System.out.println(representation.getText()); } catch (Exception e) { e.printStackTrace(); } } public void student_put(){ try { ClientResource client = new ClientResource( "http://127.0.0.1:8080/SpringRestlet/student/1"); Student student = new Student("Test_Put", 1, 18); Representation representation = client.put( student, MediaType.APPLICATION_JAVA_OBJECT); System.out.println(representation.getText()); } catch (Exception e) { e.printStackTrace(); } } public void student_post(){ try { ClientResource client = new ClientResource( "http://127.0.0.1:8080/SpringRestlet/student"); Student student = new Student("Test_Post", 1, 18); Representation representation = client.post( student, MediaType.APPLICATION_JAVA_OBJECT); System.out.println(representation.getText()); } catch (Exception e) { e.printStackTrace(); } } public void student_findAll(){ try { ClientResource client = new ClientResource( "http://127.0.0.1:8080/SpringRestlet/student"); Representation representation = client.get(); System.out.println(representation.getText()); } catch (Exception e) { e.printStackTrace(); } } public static void main(String[] args) { StudentClient client = new StudentClient(); client.student_get(); }} 9、补充
(1)、请求参数问题：客户端发送形如/student/{studentId}的URI请求时，可能是还需要携带其他parameter的，参数携带形式可如/student/{studentId}?name=John&sex=23；Server端获取参数时，针对在URI{}内的参数使用getRequest().getAttributes().get("studentId");方式获取，针对附加参数可以通过Form form = getRequest().getResourceRef().getQueryAsForm(); String name = form.getValues("name");方式获取。
(2)、客户端工具：测试Server端时，如果不想写Client端code,可以是WizTools.org的RestClient-ui.jar的小工具，Post和Put请求时的对象可以以JSON格式添加到Http body中即可。
(3)、相关资源：文中工程以上传至51cto下载中心，含代码和Jar包。链接地址: