cas登陆页定义异常提示（中英文等）：
两种异常的处理方式不同，1，是通过配置文件指定用哪个异常类和方法 2，是通过继承AuthenticationViaFormAction类实现（见后文）
不同异常的提示，区分中英文
1， 定义好自定义异常
2，在执行异常的地方抛出
3，定义好捕捉异常的处理器
property属性文件:
authenticationFailure.AccountNotFoundException=户名或密码错误.
authenticationFailure.FailedLoginException=户名或密码错误.
authenticationFailure.AccountNotFoundExceptionEn=Invalid credentials.
authenticationFailure.FailedLoginExceptionEn=Invalid credentials.
1， 定义好自定义异常
package org.esteels.cas.validator;
import javax.security.auth.login.LoginException;
/**
* Signals that user authentication failed.
*
* <p> This exception is thrown by LoginModules if authentication failed.
* For example, a <code>LoginModule</code> throws this exception if
* the user entered an incorrect password.
*
*/
public class FailedLoginExceptionEn extends LoginException {
private static final long serialVersionUID = 802556922354616286L;
/**
* Constructs a FailedLoginException with no detail message. A detail
* message is a String that describes this particular exception.
*/
public FailedLoginExceptionEn() {
super();
}
/**
* Constructs a FailedLoginException with the specified detail
* message. A detail message is a String that describes this particular
* exception.
*
* <p>
*
* @param msg the detail message.
*/
public FailedLoginExceptionEn(String msg) {
super(msg);
}
}
2，在执行异常的地方抛出（这里覆写后要修改配置文件引用此类的路径）
public class QueryDatabaseAuthenticationHandler
extends AbstractJdbcUsernamePasswordAuthenticationHandler
{
{
@NotNull
private String sql;
protected final HandlerResult authenticateUsernamePasswordInternal(UsernamePasswordCredential credential)
throws GeneralSecurityException, PreventedException
{
RemembermeAndCaptcha cuCredential = (RemembermeAndCaptcha) credential;
String username = credential.getUsername();
int webflag= cuCredential.getWebflag();
String encryptedPassword = getPasswordEncoder().encode(credential.getPassword());
try {
String dbPassword = (String)getJdbcTemplate().queryForObject(this.sql, String.class, new Object[] { username });
if (!dbPassword.equals(encryptedPassword)) {
if(webflag==0){///中英文
throw new FailedLoginException("Password does not match value on record.");//哪种异常
}else{
throw new FailedLoginExceptionEn("Password does not match value on record.");
}
}
} catch (IncorrectResultSizeDataAccessException e) {
if (e.getActualSize() == 0) {
throw new AccountNotFoundException(username + " not found with SQL query");
}
throw new FailedLoginException("Multiple records found for " + username);
}
catch (DataAccessException e) {
throw new PreventedException("SQL exception while executing query for " + username, e);
}
return createHandlerResult(credential, new SimplePrincipal(username), null);
}
3，定义好捕捉异常的处理器
public class AuthenticationExceptionHandler
{
private static final String UNKNOWN = "UNKNOWN";
private static final String DEFAULT_MESSAGE_BUNDLE_PREFIX = "authenticationFailure.";
private static final List<Class<? extends Exception>> DEFAULT_ERROR_LIST = new ArrayList();
private final Logger logger = LoggerFactory.getLogger(getClass());
static {
DEFAULT_ERROR_LIST.add(AccountLockedException.class);
DEFAULT_ERROR_LIST.add(FailedLoginException.class);
DEFAULT_ERROR_LIST.add(CredentialExpiredException.class);
DEFAULT_ERROR_LIST.add(AccountNotFoundException.class);
DEFAULT_ERROR_LIST.add(AccountDisabledException.class);
DEFAULT_ERROR_LIST.add(InvalidLoginLocationException.class);
DEFAULT_ERROR_LIST.add(InvalidLoginTimeException.class);
DEFAULT_ERROR_LIST.add(FailedLoginExceptionEn.class);
DEFAULT_ERROR_LIST.add(AccountNotFoundExceptionEn.class);
}
｝
cas-servlet.xml：
<bean id="authenticationExceptionHandler" class="org.esteels.cas.authentication.AuthenticationExceptionHandler" />//类中要增加比对哪些异常（复写）
AuthenticationExceptionHandler这个源码里面根据异常类名拼接配置属性，并获取值
<action-state id="handleAuthenticationFailure">
<evaluate expression="authenticationExceptionHandler.handle(currentEvent.attributes.error, messageContext)" />
<transition on="AccountDisabledException" to="casAccountDisabledView"/>
<transition on="AccountLockedException" to="casAccountLockedView"/>
<transition on="CredentialExpiredException" to="casExpiredPassView"/>
<transition on="InvalidLoginLocationException" to="casBadWorkstationView"/>
<transition on="InvalidLoginTimeException" to="casBadHoursView"/>
<transition on="FailedLoginException" to="generateLoginTicket"/>
<transition on="AccountNotFoundException" to="generateLoginTicket"/>
<transition on="FailedLoginExceptionEn" to="generateLoginTicket"/>
<transition on="AccountNotFoundExceptionEn" to="generateLoginTicket"/>
<transition on="UNKNOWN" to="generateLoginTicket"/>
</action-state>
<action-state id="realSubmit">
<evaluate expression="authenticationViaFormAction.submit(flowRequestContext, flowScope.credential, messageContext)" />
<transition on="warn" to="warn" />
<transition on="success" to="sendTicketGrantingTicket" />
<transition on="successWithWarnings" to="showMessages" />
<transition on="authenticationFailure" to="handleAuthenticationFailure" />
<transition on="error" to="generateLoginTicket" />
</action-state>
<action-state id="generateServiceTicket">
<evaluate expression="generateServiceTicketAction" />
<transition on="success" to ="warn" />
<transition on="authenticationFailure" to="handleAuthenticationFailure" />
<transition on="error" to="generateLoginTicket" />
<transition on="gateway" to="gatewayServicesManagementCheck" />
</action-state>
被注入的这个到那个视图
<action-state id="generateLoginTicket">
<evaluate expression="generateLoginTicketAction.generate(flowRequestContext)" />
<transition on="generated" to="viewLoginForm" />
</action-state>
这个视图有什么属性
<view-state id="viewLoginForm" view="casLoginView" model="credential">
<binder>
<binding property="username" />
<binding property="password" />
<!-- 增加验证码属性 -->
<binding property="captcha" />
<!-- 增加rememberMe属性 -->
<binding property="rememberMe" />
<!-- 判断中英文网站 -->
<binding property="webflag" />
</binder>
<on-entry>
<set name="viewScope.commandName" value="'credential'" />
</on-entry>
<transition on="submit" bind="true" validate="true" to="EsteelsValidator"><!-- 自定义验证 -->
<evaluate expression="authenticationViaFormAction.doBind(flowRequestContext, flowScope.credential)" />
</transition>
</view-state>
标签：String,中英文,cas,LIST,DEFAULT,add,ERROR,class,定义 From： https://www.cnblogs.com/telwanggs/p/18099891