（1）：casLoginView.jsp 添加如下信息
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<
view-state
id
=
"viewLoginForm"
view
=
"casLoginView"
model
=
"credentials"
>
<
binder
>
<
binding
property
=
"username"
/>
<
binding
property
=
"password"
/>
<binding property="captcha" />
</
binder
>
<
on-entry
>
<
set
name
=
"viewScope.commandName"
value
=
"'credentials'"
/>
</
on-entry
>
<
transition
on
=
"submit"
bind
=
"true"
validate
=
"true"
to
=
"realSubmit"
>
<
evaluate
expression
=
"authenticationViaFormAction.doBind(flowRequestContext, flowScope.credentials)"
/>
</
transition
>
</
view-state
>
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（2）：casLoginView.jsp 添加如下信息
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<
div
class
=
"log_input_box"
>
<
span
class
=
"log_tit"
>动态码</
span
>
<
div
class
=
"login_box_input"
style
=
"padding:0px;"
>
<
input
tabindex
=
"3"
type
=
"text"
id
=
"captcha"
name
=
"captcha"
autocomplete
=
"off"
class
=
"login_box_input"
placeholder
=
"请输入动态码"
style
=
"width:120px;border:none;margin-right:9px;"
>
<
span
style
=
"float:left;"
>|</
span
>
<
a
href
=
"javascript:;"
class
=
"log_btn_01"
style
=
"float:left;"
id
=
"getPhoneCode"
onclick
=
"javascript:getPhoneCode();"
>获取动态码</
a
>
<
span
id
=
"timeShow"
style
=
"float:left;display:none;backgronclick="
javascript:submitInfo();"ound-color:rgba(222, 222, 222, 1)!important;color:rgba(102, 102, 102, 1)!important;"
class
=
"log_btn_01"
></
span
>
</
div
>
</
div
>
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（3）：UsernamePasswordCredentials 添加captcha字段，
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@NotNull
@Size
(min=
1
,message =
"required.captcha"
)
private
String captcha;
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在 equals 和 hashCode 添加判断条件
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@Override
public
boolean
equals(
final
Object o) {
if
(
this
== o)
return
true
;
if
(o ==
null
|| getClass() != o.getClass())
return
false
;
UsernamePasswordCredentials that = (UsernamePasswordCredentials) o;
if
(password !=
null
? !password.equals(that.password) : that.password !=
null
)
return
false
;
if
(username !=
null
? !username.equals(that.username) : that.username !=
null
)
return
false
;
if
(captcha !=
null
? !captcha.equals(that.captcha) : that.captcha !=
null
)
return
false
;
return
true
;
}
@Override
public
int
hashCode() {
int
result = username !=
null
? username.hashCode() :
0
;
result =
31
* result + (password !=
null
? password.hashCode() :
0
);
result =
31
* result + (captcha !=
null
? captcha.hashCode() :
0
);
return
result;
}
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（4）：根据配置文件的Class 重写 类
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<bean id=
"primaryAuthenticationHandler"
class
=
"org.jasig.cas.adaptors.jdbc.QueryDatabaseAuthenticationHandler"
>
<property name=
"dataSource"
ref=
"dataSource"
></property>
<property name=
"sql"
value=
"select apassword from sys_t_user where del_flag='0' and alogin_name=?"
></property>
<property name=
"passwordEncoder"
ref=
"MD5PasswordEncoder"
></property>
</bean>
<bean id=
"secondaryAuthenticationHandler"
class
=
"com.unknow.cas.server.web.flow.QueryDatabaseAuthenticationWithUsernameHandler"
>
<property name=
"dataSource"
ref=
"dataSource"
></property>
<property name=
"sql"
value=
"select apassword from sys_t_user where del_flag='0' and alogin_name=?"
></property>
</bean>
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重写 QueryDatabaseAuthenticationWithUsernameHandler
AuthenticationManagerImpl extends AbstractAuthenticationManager
AbstractAuthenticationManager extends AuthenticationManager
问题：
（1）：UsernamePasswordCredentialsToPrincipalResolver 与Credentials 如何关联
（2）：什么时候调用 UsernameOnlyCredentialsToPrincipalResolver