restful入门实例（可运行）

package com.ddnet.controller; import java.io.IOException; import java.io.PrintWriter; import java.util.List; import javax.servlet.http.HttpServletResponse; import org.apache.struts2.ServletActionContext; import org.apache.struts2.convention.annotation.Result; import org.apache.struts2.convention.annotation.ResultPath; import org.apache.struts2.convention.annotation.Results; import org.apache.struts2.rest.DefaultHttpHeaders; import org.apache.struts2.rest.HttpHeaders; import com.ddnet.biz.BookBiz; import com.ddnet.model.Book; import com.opensymphony.xwork2.ActionSupport; import com.opensymphony.xwork2.ModelDriven; @ResultPath("/WEB-INF/content/rest") @Results({ @Result(name = "success", type = "redirectAction", params = { "actionName","book" }), @Result(name = "json", type = "json") }) public class BookController extends ActionSupport implements ModelDriven<Object> { /** * 默认执行方法 * @return */ public HttpHeaders index() { System.out.println("===Calling index()==="); list = bookBiz.getAll(); return new DefaultHttpHeaders("index").disableCaching(); } // 处理不带 id 参数的 GET 请求 进入添加对象页面 public String editNew() { System.out.println("===Calling editNew()==="); //创建一个新图书 model = new Book(); return "editNew"; } // 处理不带id参数的POST请求, 保存图书 public HttpHeaders create() { System.out.println("===Calling create()==="); System.out.println("===model.name:"+model.getName()+ "==="); //保存图书 bookBiz.saveOrUpdate(model); outJson("ok"); System.out.println("===Ending create()==="); return new DefaultHttpHeaders("json").disableCaching(); } private void outJson(String json) { HttpServletResponse response = ServletActionContext.getResponse(); try { PrintWriter out = response.getWriter(); out.write(json); out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } } //处理带id 参数的GET请求,显示指定图书 public HttpHeaders show() { System.out.println("id="+ServletActionContext.getRequest().getParameter("id")); System.out.println("===Calling show()==="); return new DefaultHttpHeaders("show"); } // 处理带id参数、且指定操作edit资源的GET请求, 进入编辑页面 (book-edit.jsp) public String edit() { System.out.println("===Calling edit()==="); return "edit"; } // 处理带id参数的PUT请求,修改图书 public String update() { System.out.println("===Calling update()==="); System.out.println("===book.name==="+model.getName()); bookBiz.saveOrUpdate(model); outJson("ok"); addActionMessage("图书编辑成功！"); return "json"; } //处理带id参数的PUT请求,修改图书 public String modify() { System.out.println("===Calling modify()==="); System.out.println("===book.name==="+model.getName()); bookBiz.saveOrUpdate(model); addActionMessage("图书编辑成功！"); return "success"; } // 处理带 id 参数，且指定操作 deleteConfirm 资源的方法 // 进入删除页面 (book.jsp) public String del() { System.out.println("===Calling del()==="); bookBiz.remove(Integer.parseInt(sid)); return "success"; } // 处理带 id 参数的 DELETE 请求 // 删除图书 public String destroy() { //bookBiz.remove(id); //addActionMessage("成功删除 ID 为" + id + "的图书！"); return "success"; } public String test() { System.out.println("===Calling test()==="); return "index"; } /** * */ private static final long serialVersionUID = 1L; private String sid = "1"; private Book model = new Book(); private List<Book> list; private String _method; // 定义业务逻辑组件 private BookBiz bookBiz = new BookBiz(); public void setModel(Book model) { this.model = model; } public Object getModel() { return (list != null ? list : model); } public List<Book> getList() { return list; } public void setList(List<Book> list) { this.list = list; } public String get_method() { return _method; } public void set_method(String _method) { this._method = _method; } public String getSid() { System.out.println("===Calling getSid()==="); return sid; } public void setSid(String sid) { System.out.println("===Calling setSid()==="); System.out.println("===sid="+sid); sid = (sid.equals(""))?"1":sid; this.sid = sid; if (Integer.parseInt(this.sid) > 0) { this.model = bookBiz.get(Integer.parseInt(this.sid)); } } }