5.1通过actioncontext:
1 public String execute() throws Exception { 2 3 ActionContext ctx = ActionContext.getContext(); 4 5 // 通过ActionContext访问application范围的属性值 6 7 Integer counter = (Integer) ctx.getApplication().get("counter"); 8 9 if (counter == null) { 10 11 counter = 1; 12 13 } else { 14 15 counter = counter + 1; 16 17 } 18 19 // 通过ActionContext设置application范围的属性 20 21 ctx.getApplication().put("counter", counter); 22 23 // 通过ActionContext设置session范围的属性 24 25 ctx.getSession().put("user", getUser()); 26 27 if (getUser().equals("zcx")) { 28 29 // 通过ActionContext设置request范围的属性 30 31 ctx.put("tip", "欢迎登录"); 32 33 return SUCCESS; 34 35 } 36 37 // 通过ActionContext设置request范围的属性 38 39 ctx.put("tip", "登录失败"); 40 41 return ERROR; 42 43 }
取数据:注意写在HTML页面的OGNL表达式语法
${applicationScope.counter}
${sessionScope.user}
${requestScope.tip}
5.2实现servletcontextaware、servletrequestaware、servletresponseaware
实现ServletResponseAware 设置cookie
1 public class LoginAction implements Action, ServletResponseAware { 2 3 private String user; 4 5 private String pwd; 6 7 private String tip; 8 9 private HttpServletResponse response; 10 11 12 13 public String getPwd() { 14 15 return pwd; 16 17 } 18 19 20 21 public void setPwd(String pwd) { 22 23 this.pwd = pwd; 24 25 } 26 27 28 29 public String getUser() { 30 31 return user; 32 33 } 34 35 36 37 public void setUser(String user) { 38 39 this.user = user; 40 41 } 42 43 44 45 public String execute() throws Exception { 46 47 ActionContext ctx = ActionContext.getContext(); 48 49 // 通过ActionContext访问application范围的属性值 50 51 Integer counter = (Integer) ctx.getApplication().get("counter"); 52 53 if (counter == null) { 54 55 counter = 1; 56 57 } else { 58 59 counter = counter + 1; 60 61 } 62 63 // 通过ActionContext设置application范围的属性 64 65 ctx.getApplication().put("counter", counter); 66 67 // 通过ActionContext设置session范围的属性 68 69 ctx.getSession().put("user", getUser()); 70 71 if (getUser().equals("zcx")) { 72 73 // 通过response添加Cookie 74 75 Cookie c = new Cookie("user", getUser()); 76 77 c.setMaxAge(60 * 60); 78 79 response.addCookie(c); 80 81 // 通过ActionContext设置request范围的属性 82 83 ctx.put("tip", "服务器提示:您已经成功的登录"); 84 85 return SUCCESS; 86 87 } 88 89 // 通过ActionContext设置request范围的属性 90 91 ctx.put("tip", "登录失败"); 92 93 return ERROR; 94 95 } 96 97 98 99 public String getTip() { 100 101 return tip; 102 103 } 104 105 106 107 public void setTip(String tip) { 108 109 this.tip = tip; 110 111 } 112 113 114 115 @Override 116 117 public void setServletResponse(HttpServletResponse httpServletResponse) { 118 119 this.response = response; 120 121 } 122 123 }
5.3使用servletactioncontext
1 public class LoginAction implements Action { 2 3 private String user; 4 5 private String pwd; 6 7 private String tip; 8 9 private HttpServletResponse response; 10 11 12 13 public String getPwd() { 14 15 return pwd; 16 17 } 18 19 20 21 public void setPwd(String pwd) { 22 23 this.pwd = pwd; 24 25 } 26 27 28 29 public String getUser() { 30 31 return user; 32 33 } 34 35 36 37 public void setUser(String user) { 38 39 this.user = user; 40 41 } 42 43 44 45 public String execute() throws Exception { 46 47 ActionContext ctx = ActionContext.getContext(); 48 49 // 通过ActionContext访问application范围的属性值 50 51 Integer counter = (Integer) ctx.getApplication().get("counter"); 52 53 if (counter == null) { 54 55 counter = 1; 56 57 } else { 58 59 counter = counter + 1; 60 61 } 62 63 // 通过ActionContext设置application范围的属性 64 65 ctx.getApplication().put("counter", counter); 66 67 // 通过ActionContext设置session范围的属性 68 69 ctx.getSession().put("user", getUser()); 70 71 if (getUser().equals("zcx")) { 72 73 // 通过response添加Cookie 74 75 Cookie c = new Cookie("user", getUser()); 76 77 c.setMaxAge(60 * 60); 78 79 ServletActionContext.getResponse().addCookie(c); 80 81 // 通过ActionContext设置request范围的属性 82 83 ctx.put("tip", "服务器提示:您已经成功的登录"); 84 85 return SUCCESS; 86 87 } 88 89 // 通过ActionContext设置request范围的属性 90 91 ctx.put("tip", "登录失败"); 92 93 return ERROR; 94 95 } 96 97 98 99 public String getTip() { 100 101 return tip; 102 103 } 104 105 106 107 public void setTip(String tip) { 108 109 this.tip = tip; 110 111 } 112 113 114 115 }