JAVA中这种写法合理吗？

[言月秋]

LogingServiceAction 中
public String execute() throws Exception{
List<User> userList=userdao.findByName(username);
for(User user:userList){
if(user.getPassword().equals(password)){
return SUCCESS;
}
else{
return ERROR;
}
}
return ERROR;
}
}
在某个地方看见上面这代码，其中 ，如return SUCCESS，这种代码可以这么写吗，存在的依据又是什么？

[anakin_feng]

啥意思啊，这代码有什么问题吗

[言月秋]

引用 1 楼 Molly_1994 的回复:

啥意思啊，这代码有什么问题吗

简单说就是在eclipse中这么写报错

[liucatch]

可以这么写，基类里面是有定义的。 public interface Action { /** * The action execution was successful. Show result * view to the end user. */ public static final String SUCCESS = "success"; /** * The action execution was successful but do not * show a view. This is useful for actions that are * handling the view in another fashion like redirect. */ public static final String NONE = "none"; /** * The action execution was a failure. * Show an error view, possibly asking the * user to retry entering data. */ public static final String ERROR = "error"; /** * The action execution require more input * in order to succeed. * This result is typically used if a form * handling action has been executed so as * to provide defaults for a form. The * form associated with the handler should be * shown to the end user. * <p/> * This result is also used if the given input * params are invalid, meaning the user * should try providing input again. */ public static final String INPUT = "input"; /** * The action could not execute, since the * user most was not logged in. The login view * should be shown. */ public static final String LOGIN = "login"; /** * Where the logic of the action is executed. * * @return a string representing the logical result of the execution. * See constants in this interface for a list of standard result values. * @throws Exception thrown if a system level exception occurs. * <b>Note:</b> Application level exceptions should be handled by returning * an error value, such as <code>Action.ERROR</code>. */ public String execute() throws Exception; }

[anakin_feng]

引用 2 楼 yanyueqiu 的回复:

引用 1 楼 Molly_1994 的回复:

啥意思啊，这代码有什么问题吗

简单说就是在eclipse中这么写报错

它这个类不是单独存在的，struts里需要继承某个Action，SUCCESS那些都是定义过的常量

[gzqGyula]

liucatch 说的不错，你也可以直接用 return “success” 就是为了给前台返回一个处理结果

[言月秋]

引用 4 楼 Molly_1994 的回复:

引用 2 楼 yanyueqiu 的回复:

[quote=引用 1 楼 Molly_1994 的回复:] 啥意思啊，这代码有什么问题吗

简单说就是在eclipse中这么写报错

它这个类不是单独存在的，struts里需要继承某个Action，SUCCESS那些都是定义过的常量[/quote] 看了另一位仁兄给的答案，明白了。