如何通过身份验证提供程序从数据库对用户进行身份验证？

Question

我是Spring安全的新手，我想用数据库验证用户。我已经用jdbc创建了一个登录页面和一个身份验证提供程序，它检查用户是否存在于数据库中。但是我的代码没有这样做的问题是，它允许所有用户登录！我的代码怎么了？谢谢你的帮助。

@Component(value = "userService")
public class UserService implements AuthenticationProvider {

@Inject
@Named(value = "dataSource")
private DataSource dataSource;

ResultSet resultSet = null;
PreparedStatement preparedStatement = null;
Connection connection = null;

name=auth.getName();    
    pwd=auth.getCredentials().toString();


public Authentication authenticate(Authentication auth)
        throws AuthenticationException {
    final String select_auth = "select username,password from users where username='"+name+"' and password='"+pwd+"'";
    try {
        connection = dataSource.getConnection();
        preparedStatement = connection.prepareStatement(select_auth);
        resultSet = preparedStatement.executeQuery();
        while (resultSet.next()) {

                 //what to return here ?
            }

这是我的安全会议。xml:

<http auto-config="true">
    <form-login login-page="/login" username-parameter="j_username"
        password-parameter="j_password" default-target-url="/accueil"

        authentication-failure-url="/403" />
    <logout logout-success-url="/login" />
</http>

<authentication-manager>
    <authentication-provider ref="userService">
    </authentication-provider>
</authentication-manager>

Answer 1

在代码中，我看不到为查询设置用户名和密码的位置。您尝试获取名称和密码，并检查您的查询是否返回任何结果

  @Override
public Authentication authenticate(Authentication authentication) throws AuthenticationException {
    String select_auth = "select username,password from users where username=? and password=?";
    String username = authentication.getName();
    String password = (String) authentication.getCredentials();

    preparedStatement = connection.prepareStatement(select_auth);
    p.setString(1, username);
    p.setString(2, password);
    resultSet = preparedStatement.executeQuery();

    while (resultSet.next()) {

        List<SampleAuthority> authorities = new ArrayList<SampleAuthority>();

        SampleAuthority a = new SampleAuthority();
        authorities.add(a);
        Collection<? extends GrantedAuthority> authorities1 = authorities;
        return new UsernamePasswordAuthenticationToken(username, password, authorities1);

   }
}

@Override
public boolean supports(Class<?> arg0) {
    return true;
}

class SampleAuthority implements GrantedAuthority {

    @Override
    public String getAuthority() {
        return "ROLE_USER";
    }

}

在配置中，您可以添加

<intercept-url pattern="/**" access="hasRole('ROLE_USER')" />
<logout logout-url="/logout" />