求教：高手帮忙Spring MVC MultiActionController validator验证问题
这是错误代码Servlet.service() for servlet dispatcher threw exception
org.springframework.validation.BindException: org.springframework.validation.BeanPropertyBindingResult: 2 errors
Field error in object 'command' on field 'username': rejected value []; codes [username.is.null.command.username,username.is.null.username,username.is.null.java.lang.String,username.is.null]; arguments []; default message [用户名不能为空]
Field error in object 'command' on field 'password': rejected value []; codes [password.is.null.command.password,password.is.null.password,password.is.null.java.lang.String,password.is.null]; arguments []; default message [密码不能为空]
这是MultiActionController代码：
Java code
public class AdminsController extends MultiActionController {
private Admins admin;
private AdminServiceImp adminservice;
/**
* 初始化页面方法
* @param request
* @param response
* @return
*/
public ModelAndView initPage(HttpServletRequest request,HttpServletResponse response){
Map<String, Object> model = new HashMap<String, Object>();
model.put("command", admin);
System.out.println(model);
return new ModelAndView("Login",model);
}
/**
* 验证登陆的方法
* @param request
* @param response
* @param admin
* @return
*/
public ModelAndView login(HttpServletRequest request,HttpServletResponse response,Admins command){
Map<String, Object> model = new HashMap<String, Object>();
model.put("Login", command);
HttpSession session = request.getSession();
boolean flag=adminservice.checkLogin(command.getUsername(), command.getPassword());
if(flag){
session.setAttribute("admin", command);
return new ModelAndView("Index");
}
return new ModelAndView("Index",model);
}这是Validator中的代码：
Java code
public class LoginValidator implements Validator {
public boolean supports(Class clazz) {
// TODO Auto-generated method stub
return clazz.equals(Admins.class);
}
public void validate(Object admins, Errors errors) {
// TODO Auto-generated method stub
ValidationUtils.rejectIfEmptyOrWhitespace(errors,"username", "username.is.null", "用户名不能为空");
ValidationUtils.rejectIfEmptyOrWhitespace(errors, "password", "password.is.null", "密码不能为空");
Admins admin=(Admins)admins;
}
}这是dispatcher-servlet配置文件：
XML code
<bean name="/admins.do"
class="cn.inspur.hzp.controller.AdminsController">
<property name="methodNameResolver" ref="methodResolver"></property>
<property name="admin" ref="admins"></property>
<property name="adminservice" ref="adminservice"></property>
<property name="validators">
<list>
<bean id="loginValidator"
class="cn.inspur.hzp.validator.LoginValidator" />
</list>
</property>
</bean>
这是HTML页面中的代码：
HTML code
<table width="100%" border="0" align="center" cellpadding="0"
cellspacing="0" background="images/position_line.jpg" ID="Table4">
<form:form action="admins.do?method=login" method="post"
name="Form1">
<tr>
<td width="14" height="38" align="right" valign="top">
<img src="<%=basePath%>/Admin/images/position.jpg" width="12"
height="38" />
</td>
<td width="116" background="images/position_line.jpg">
<img src="<%=basePath%>/Admin/images/memberLogin.jpg"
width="116" height="33" />
</td>
<td background="<%=basePath%>/Admin/images/position_line.jpg"
class="search_field">
<div class="search_form">
用户名
<form:input path="username" cssClass="search" id="uid"
size="20" />
<form:errors path="username"></form:errors>
密码
<form:password path="password" cssClass="search" />
<form:errors path="password"></form:errors>
<input type="submit" value="登录" class="submit"
onclick="return loginCheck();" ID="Submit1" />
</div>
</td>
<td width="15" class="ProductText">
<img src="<%=basePath%>/Admin/images/position_End.jpg"
width="12" height="38" />
</td>
</tr>
</form:form>
</table>
如何用MultiActionController的validators属性实现验证，高手帮忙吧 --------------------编程问答-------------------- @Override
public void doFilter(ServletRequest requestSer, ServletResponse responseSer, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) requestSer;
HttpServletResponse response = (HttpServletResponse) responseSer;
// 设置请求参数
setParameters(WebUtils.getParametersStartingWith(request, ""));
// 获取根目录所对应的绝对路径:
String currentURI = request.getRequestURI();
log.info("doFilter.currentURI: " + currentURI);
log.info("request.getContextPath():"+ request.getContextPath()+".");
// 截取命名空间、action、路径参数
String targerURI ="";
if ("".equals(request.getContextPath())) {
targerURI = currentURI.substring(currentURI.indexOf("/", 0), currentURI.length());
}else{
targerURI = currentURI.substring(currentURI.indexOf("/", 1), currentURI.length());
}
log.info("doFilter.targerURI: " + targerURI);
if ("/".equals(targerURI)|| (!targerURI.endsWith(".htm"))) {
chain.doFilter(request, response);
return;
}
// 如果属于白名单，直接返回
if (checkBlank(targerURI)) {
chain.doFilter(request, response);
return;
}
HttpSession session = request.getSession();
// 子系统登录
if (null == session || session.getAttribute(SessionConstants.SESSION_USER) == null) {
log.info("session 地址是"+request.getRequestURL()+"");
request.getSession().setAttribute(SessionConstants.SESSION_PRE_URL, request.getRequestURL());
response.sendRedirect(request.getContextPath() + VGS_LOGIN_URL);
return;
}
// 从COOKIE中取出B2C登陆信息
Cookie[] cookies = request.getCookies();
String memberId = "";
if (null != cookies) {
for (Cookie cookie : cookies) {
if (cookie.getName().startsWith("WC_USERACTIVITY_")) {
memberId = cookie.getName().substring(cookie.getName().lastIndexOf("_") + 1); // 取出B2C登陆的会员ID
//log.info("doFilter.memberId: "+memberId);
break;
}
}
}
if (StringUtils.isNotEmpty(memberId) && !"-1002".equals(memberId)) {// memberId不
// 为空，且不是-1002,说明B2C已经登陆
// 检查子系统是否登录，如果子系统登录，检查账号是否一致，
SessionUserModel sessionData = (SessionUserModel) session
.getAttribute(SessionConstants.SESSION_USER);
if ((null == sessionData) || (!memberId.equals(sessionData.getMemberId()))) { // 子系统没有登录，或者
// B2C账号和子系统账号不同，则需要从B2C重新登录
// 清空子系统登录信息
session.removeAttribute(SessionConstants.SESSION_USER);
}
} else { // B2C没有登录，清空子系统登录信息
session.removeAttribute(SessionConstants.SESSION_USER);
}
chain.doFilter(request, response);
return;
}
/**
* 判断白名单
*
* @param url
* @return
*/
private boolean checkBlank(String url) {
if (null == blank || blank.size() == 0)
return false;
else
for (int i = 0; i < blank.size(); i++)
//if (blank.get(i).equals(url))
if(url.startsWith(blank.get(i)))
return true;
return false;
}
/**
* 初始化白名单
*
* @param servletContext
* @return
*/
private List<String> getBlank(ServletContext servletContext) {
List<String> blank = new ArrayList<String>();
try {
ApplicationContext ctx = WebApplicationContextUtils
.getWebApplicationContext(servletContext);
InputStream is = ctx.getResource("classpath:conf/auth/blank.txt").getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String line;
while ((line = br.readLine()) != null) {
blank.add(line);
}
if (null != br) {
br.close();
}
} catch (IOException e) {
log.error("读取白名单出错");
}
return blank;
}
public void setBlank(List<String> blank) {
this.blank = blank;
}
public Map<String, Object> getParameters() {
return parameters;
}
public void setParameters(Map<String, Object> parameters) {
this.parameters = parameters;
} --------------------编程问答-------------------- 我想实现的非空校验，当输入用户名或密码为空时，会提示，用户名不能为空，密码不能为空，用Validator实现。 --------------------编程问答-------------------- 你再controller层也可以验证啊 ，这个最简单 当用户名和密码为空的话 ，通过modelandview 设置信息，返回到jsp页面显示 。 --------------------编程问答-------------------- http://www.cnblogs.com/tanhao/archive/2011/01/09/1931052.html 你要不参考下这个吧 --------------------编程问答-------------------- http://blog.sina.com.cn/u/3263388355
补充：Java , Web 开发
