cas之自定义代码查询认证

1、在eclipse中导入【cas-server-webapp-3.3.2.war（在cas-server/modules下面）】war项目，
2、添加 jar 引用文件：cas-server-support-jdbc-3.3.2.jar和mysql-connector-java-3.1.13-bin.jar
3、新建自定义类 CustomQueryDBHandler继承AbstractJdbcUsernamePasswordAuthenticationHandler

public final class CustomQueryDBHandler extends
    AbstractJdbcUsernamePasswordAuthenticationHandler {
    @NotNull
    private String sql;
    @Override
    protected final boolean authenticateUsernamePasswordInternal(
        final UsernamePasswordCredentials credentials)
        throws AuthenticationException {
        final String username = credentials.getUsername();
        final String password = credentials.getPassword();
        final String encryptedPassword = this.getPasswordEncoder().encode(
            password);
        
        try {
            final String dbPassword = getJdbcTemplate().queryForObject(
                this.sql, String.class, username);

            if (password==null ){

                //在中messages_zh_CN.properties文件中添加以下信息（密码错误）
//error.authentication.credentials.bad.usernameorpassword.password=\u5bc6\u7801\u9519\u8bef
                throw new BadPasswordAuthenticationException();
            }

            return dbPassword.equals(encryptedPassword);
        } catch (final IncorrectResultSizeDataAccessException e) {
            // this means the username was not found.
            return false;
        }
    }
    /**
     * @param sql The sql to set.
     */
    public void setSql(final String sql) {
        this.sql = sql;
    }
}

4、更改验证方式

                <bean
class="com.tgb.handler.CustomQueryDBHandler ">

<property name="dataSource" ref="dataSource"></property>
<property name="sql" value="select PASSWORD from sso_t_user where LOGIN_NAME=?"></property>
</bean>