Struts2 json Could not find action or result 坑爹问题,调了半天终于调好了

最新闲来无事，打算做个Struts2+spring+Mybatis的项目玩玩，没想到在Struts2 的Ajax检测用户名是否重复上纠结了半天.

2013-01-10 15:30:12  [ http-80-1:51281 ] - [ ERROR ]  Could not find action or result
/PMS/product.action?searchHelp.productClass=1
No result defined for action com.liaochente.pms.productinfo.action.ProductInfoAction and result SUCCESS
	at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:375)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:277)
	at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
	at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)

最开始以为是少包，因为在STRUTS.XML中一直提示找不到JSON-DEFAULT，然后就苦逼的换了好几次包，但是还是不行。

最后没办法 手写了个空的ACTION的构造函数，然后打个断点，一步一步的跟了下去，最后发现在validate()方法中校验不通过，所以控制台不报错，他自动去找返回名为input的那一项，但是我配的是JSON通信，并没有配置INPUT所以直接报 could not find action or result .....input

Action代码:

public class RegisterAction extends ActionSupport implements SessionAware
{
    private static final long serialVersionUID = 1L;

    private RegisterUserInfo userInfo;
    
    private RegisterService service;
        
    private Map<String, Object> session;
    
    private String securityCode;
    
    private boolean isCheckUserName;
    
    public RegisterAction()
    {
        System.out.println("**********Start************");
    }
    
    public String registerUserInfo()
        throws Exception
    {
        service.registerUserInfo(userInfo.toParameterMap());
        session.put(CommonConst.USER_INFO_KEY, userInfo);
        return SUCCESS;
    }
    
    /**
     * 检测验证码填写是否正确
     */
    public void validate()
    {
        String _code = session.get(CommonConst.SECURYTY_CODE)==null?"":session.get(CommonConst.SECURYTY_CODE).toString();
        if(!_code.equals(securityCode)) {
            this.addFieldError("security_error", "验证码错误");
        }
    }
    
    /**
     * 校验注册用户名是否重复
     * @return
     */
    public String checkUserName() throws Exception
    {
        isCheckUserName = service.checkUserName(userInfo);
        return SUCCESS;
    }
    
    @Override
    public void setSession(Map<String, Object> session)
    {
        this.session = session;
    }

    public RegisterUserInfo getUserInfo()
    {
        return userInfo;
    }

    public RegisterService getService()
    {
        return service;
    }

    public Map<String, Object> getSession()
    {
        return session;
    }

    public void setUserInfo(RegisterUserInfo userInfo)
    {
        this.userInfo = userInfo;
    }

    public void setService(RegisterService service)
    {
        this.service = service;
    }

    public static long getSerialversionuid()
    {
        return serialVersionUID;
    }

    public String getSecurityCode()
    {
        return securityCode;
    }

    public void setSecurityCode(String securityCode)
    {
        this.securityCode = securityCode;
    }

    public boolean isCheckUserName()
    {
        return isCheckUserName;
    }

    public void setCheckUserName(boolean isCheckUserName)
    {
        this.isCheckUserName = isCheckUserName;
    }
}

PS:因为个人偷懒把注册和检测用户名重复写在一个ACTION，但是注册的相关操作和验证码校验都是用的默认全局，结果导致异步校验户用名的时候 也走了一遍全局输入校验，所以才会有之后的问题产生。

解决方法：把execute方法和validate方法全部重命名 改成专门的注册方法。

修改后Action代码:

public class RegisterAction extends ActionSupport implements SessionAware
{
    private static final long serialVersionUID = 1L;

    private RegisterUserInfo userInfo;
    
    private RegisterService service;
        
    private Map<String, Object> session;
    
    private String securityCode;
    
    private String isCheckUserName = CommonConst.AJAX_HANDLE_STATUS_NO;
    
    public String registerUserInfo()
        throws Exception
    {
        service.registerUserInfo(userInfo.toParameterMap());
        session.put(CommonConst.USER_INFO_KEY, userInfo);
        return SUCCESS;
    }
    
    /**
     * 检测验证码填写是否正确
     */
    public void validateRegisterUserInfo()
    {
        String _code = session.get(CommonConst.SECURYTY_CODE)==null?"":session.get(CommonConst.SECURYTY_CODE).toString();
        if(!_code.equals(securityCode)) {
            this.addFieldError("security_error", "验证码错误");
        }
    }
    
    /**
     * 校验注册用户名是否重复
     * @return
     */
    public String checkUserName() throws Exception
    {
        if(service.checkUserName(userInfo))
        {
            isCheckUserName = CommonConst.AJAX_HANDLE_STATUS_YES;
        }
        return SUCCESS;
    }
    
    @Override
    public void setSession(Map<String, Object> session)
    {
        this.session = session;
    }

    public RegisterUserInfo getUserInfo()
    {
        return userInfo;
    }

    public RegisterService getService()
    {
        return service;
    }

    public Map<String, Object> getSession()
    {
        return session;
    }

    public void setUserInfo(RegisterUserInfo userInfo)
    {
        this.userInfo = userInfo;
    }

    public void setService(RegisterService service)
    {
        this.service = service;
    }

    public static long getSerialversionuid()
    {
        return serialVersionUID;
    }

    public String getSecurityCode()
    {
        return securityCode;
    }

    public void setSecurityCode(String securityCode)
    {
        this.securityCode = securityCode;
    }

    public String getIsCheckUserName()
    {
        return isCheckUserName;
    }

    public void setIsCheckUserName(String isCheckUserName)
    {
        this.isCheckUserName = isCheckUserName;
    }

}