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任务五JWT工具类的书写

3

2

会话管理

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

package com.POJO;

import com.sun.org.apache.xml.internal.security.algorithms.SignatureAlgorithm;

import javax.crypto.spec.SecretKeySpec;
import javax.xml.bind.DatatypeConverter;
import java.security.Key;
import java.util.Date;

/**
 * @author: 曹樾
 * @program: task5
 * @description: JWT生成token
 * @create: 2018/4/27 下午8:14
 */

public class JwtHelper {
    private final static String base64Secret = "MDk4ZjZiY2Q0NjIxZDM3M2NhZGU0ZTgzMjYyN2I0ZjY=";
    private final static int expiresSecond = 172800000;
    
    public static Claims parseJWT(String jsonWebToken) {
        try {
            Claims claims = Jwts.parser()
                    .setSigningKey(DatatypeConverter.parseBase64Binary(base64Secret))
                    .parseClaimsJws(jsonWebToken).getBody();
            return claims;
        } catch (Exception ex) {
            return null;
        }
    }
    
    public static String createJWT(String username, String roles, String privileges) {
        SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.HS256;
        
        long nowMillis = System.currentTimeMillis();
        Date now = new Date(nowMillis);
        
        //生成签名密钥
        byte[] apiKeySecretBytes = DatatypeConverter.parseBase64Binary(base64Secret);
        Key signingKey = new SecretKeySpec(apiKeySecretBytes, signatureAlgorithm.getJcaName());
        
        //添加构成JWT的参数
        JwtBuilder builder = Jwts.builder().setHeaderParam("typ", "JWT")
                .claim("user_name", username)
                .claim("user_role", roles)
                .claim("user_privilege", privileges)
                .signWith(signatureAlgorithm, signingKey);
        //添加Token过期时间
        if (expiresSecond >= 0) {
            long expMillis = nowMillis + expiresSecond;
            Date exp = new Date(expMillis);
            builder.setExpiration(exp).setNotBefore(now);
        }
        
        //生成JWT
        return builder.compact();
    }
}

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时间戳到底是用了什么进行方法的运用呢？

0

1

会话管理

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

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405 ‘GET’ not found

0

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

 @RequestMapping(value = "/login",method = RequestMethod.POST)

<form method="post" action="/login" >
<filter>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <servlet-name>spring-mvc-mybatis</servlet-name>
  </filter-mapping>

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slf4j和log4j2配置之后找不到日志文件

0

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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项目上传服务器之后报错

2

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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关于在servlet中创建了cookie，但在jsp中无法读取到该cookie的

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1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

//servlet中的代码
Cookie c=new Cookie(“userlogin”, ul.toString());
c.setMaxAge(60);
c.setPath(“/”);//此处添加了一句
response.addCookie(c);
response.sendRedirect(“../shopPage.jsp”);//此处改为重定向方式跳转至shopPage.jsp页面

//jsp中的代码
if(cookies!=null&& cookies.length>0){
for(Cookie c:cookies){
if(c.getName().equals(“userlogin”)){
userlogin=c.getValue();
String[] uLogin=userlogin.split(“,”);
username=uLogin[0];
password=uLogin[1];
}

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登录拦截异常

1

1

interceptor

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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重构项目后，web.xml 中的encodingFilter一直报红，一直提示找

0

1

会话管理

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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des加密之后乱码问题

1

1

md5/des

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

package com.afreon.util;
 
import java.io.IOException;
import java.security.SecureRandom;
 
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
 
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
 
public class DesUtil {
 
    private final static String DES = "DES";
 
    public static void main(String[] args) throws Exception {
        String data = "123 456";
        String key = "wang!@#$%";
        System.err.println(encrypt(data, key));
        System.err.println(decrypt(encrypt(data, key), key));
 
    }
     
    /**
     * Description 根据键值进行加密
     * @param data 
     * @param key  加密键byte数组
     * @return
     * @throws Exception
     */
    public static String encrypt(String data, String key) throws Exception {
        byte[] bt = encrypt(data.getBytes(), key.getBytes());
        String strs = new BASE64Encoder().encode(bt);
        return strs;
    }
 
    /**
     * Description 根据键值进行解密
     * @param data
     * @param key  加密键byte数组
     * @return
     * @throws IOException
     * @throws Exception
     */
    public static String decrypt(String data, String key) throws IOException,
            Exception {
        if (data == null)
            return null;
        BASE64Decoder decoder = new BASE64Decoder();
        byte[] buf = decoder.decodeBuffer(data);
        byte[] bt = decrypt(buf,key.getBytes());
        return new String(bt);
    }
 
    /**
     * Description 根据键值进行加密
     * @param data
     * @param key  加密键byte数组
     * @return
     * @throws Exception
     */
    private static byte[] encrypt(byte[] data, byte[] key) throws Exception {
        // 生成一个可信任的随机数源
        SecureRandom sr = new SecureRandom();
 
        // 从原始密钥数据创建DESKeySpec对象
        DESKeySpec dks = new DESKeySpec(key);
 
        // 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
        SecretKey securekey = keyFactory.generateSecret(dks);
 
        // Cipher对象实际完成加密操作
        Cipher cipher = Cipher.getInstance(DES);
 
        // 用密钥初始化Cipher对象
        cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
 
        return cipher.doFinal(data);
    }
     
     
    /**
     * Description 根据键值进行解密
     * @param data
     * @param key  加密键byte数组
     * @return
     * @throws Exception
     */
    private static byte[] decrypt(byte[] data, byte[] key) throws Exception {
        // 生成一个可信任的随机数源
        SecureRandom sr = new SecureRandom();
 
        // 从原始密钥数据创建DESKeySpec对象
        DESKeySpec dks = new DESKeySpec(key);
 
        // 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
        SecretKey securekey = keyFactory.generateSecret(dks);
 
        // Cipher对象实际完成解密操作
        Cipher cipher = Cipher.getInstance(DES);
 
        // 用密钥初始化Cipher对象
        cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
 
        return cipher.doFinal(data);
    }
}

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不知拦截的url这配置是否正确

1

1

interceptor

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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