spring security demo

package com.ytx.user.web.security;

import org.springframework.security.authentication.*;
import org.springframework.security.core.*;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class AuthenticationExample {
    private static AuthenticationManager am = new SampleAuthenticationManager();

    public static void main(String[] args) throws Exception {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

        while(true) {
            System.out.println("Please enter your username:");
            String name = in.readLine();
            System.out.println("Please enter your password:");
            String password = in.readLine();
            try {
                Authentication request = new UsernamePasswordAuthenticationToken(name, password);
                Authentication result = am.authenticate(request);
                SecurityContextHolder.getContext().setAuthentication(result);
                break;
            } catch(AuthenticationException e) {
                System.out.println("Authentication failed: " + e.getMessage());
            }
        }
        System.out.println("Successfully authenticated. Security context contains: " +
                SecurityContextHolder.getContext().getAuthentication());
    }
}

class SampleAuthenticationManager implements AuthenticationManager {
    static final List<GrantedAuthority> AUTHORITIES = new ArrayList<>();

    static {
        AUTHORITIES.add(new SimpleGrantedAuthority("ROLE_USER"));
    }

    public Authentication authenticate(Authentication auth) throws AuthenticationException {
        if (auth.getName().equals(auth.getCredentials())) {
            return new UsernamePasswordAuthenticationToken(auth.getName(),
                    auth.getCredentials(), AUTHORITIES);
        }
        throw new BadCredentialsException("Bad Credentials");
    }
}

spring security demo

原文：http://www.cnblogs.com/yiyaopeng/p/5137477.html