struts2里指定方法验证

悠悠 2022-06-01 14:16 159阅读 0赞

action里：//指定对save方法执行校验，写入validateSave方法，并在该方法中通过addFieldError("","")来加入验证信息  
  
public class MyAction extends ActionSupport\{     
  
    private String username;  
    public String getUsername() \{  
        return username;  
    \}  
    public void setUsername(String username) \{  
        this.username = username;  
    \}  
    private String message;  
    public void setMessage(String message) \{  
        this.message = message;  
    \}  
    public String getMessage() \{  
        return message;  
    \}  
    public String execute()\{  
        message = "execute????????";  
        ActionContext.getContext().put("message", message);  
        return "success";  
    \}  
    public String save()\{  
        message = "execute????????";  
        ActionContext.getContext().put("message", message);  
        return "success";  
    \}     
    public String implement()\{  
        message = "implement????????";  
        ActionContext.getContext().put("message", message);  
        return "success";  
    \}  
    public void validateSave() \{  
        if(this.username==null || "".equals(this.username.trim()))\{  
            this.addFieldError("username", "??????????");  
        \}  
    \}  
\}  
  
  
jsp里：通过<s:fielderror/>来输出验证提示信息  
<html>  
  <head>  
  <title>输入校验</title>  
    <meta http-equiv="pragma" content="no-cache">  
    <meta http-equiv="cache-control" content="no-cache">  
    <meta http-equiv="expires" content="0">  
  </head>  
  <body>  
   <s:fielderror/>  
      <form action="$\{pageContext.request.contextPath \}/myaction/validate\_execute.action" method="post">&nbsp;  
          用户名:<input type="text" name="username"/>不能为空<br/>  
          <input type="submit" value="提 交"/>  
      </form>  
  </body>    
</html>