SpringBoot实现License认证（只校验有效期）

import de.schlichtherle.license.LicenseContent;
import de.schlichtherle.license.LicenseParam;
import de.schlichtherle.license.LicenseManager;
import de.schlichtherle.license.DefaultCipher;
 
import java.io.*;
import java.security.PrivateKey;
import java.text.SimpleDateFormat;
import java.util.Properties;
 
public class LicenseVerifier {
 
    private static final String SERVER_PUBLIC_KEY = "your_public_key.txt";
    private static final String LICENSE_FILE = "your_license.lic";
 
    public static void main(String[] args) throws Exception {
        // 初始化 LicenseManager
        LicenseManager licenseManager = new LicenseManager(initLicenseParam());
        // 验证许可证
        licenseManager.verify();
        System.out.println("License验证通过。");
    }
 
    private static LicenseParam initLicenseParam() throws Exception {
        // 读取服务端公钥
        InputStream in = new BufferedInputStream(new FileInputStream(SERVER_PUBLIC_KEY));
        Properties props = new Properties();
        props.load(in);
        in.close();
 
        // 加载服务端公钥
        PublicKey publicKey = SecurityUtils.getPublicKey(props.getProperty("public.key"));
 
        // 构建LicenseParam
        LicenseParam licenseParam = new LicenseParam();
        licenseParam.setPublicAlias("public");
        licenseParam.setPublicKey(publicKey);
        licenseParam.setLicensePath(LICENSE_FILE);
        licenseParam.setLicenseCallback(new DefaultLicenseCallback());
        return licenseParam;
    }
 
    private static class DefaultLicenseCallback implements LicenseCallback {
        @Override
        public boolean verify(LicenseContent content) throws Exception {
            // 只验证有效期
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            Date start = sdf.parse(content.getNotBefore());
            Date end = sdf.parse(content.getNotAfter());
            Date now = new Date();
            return now.after(start) && now.before(end);
        }
 
        @Override
        public void onValid(LicenseContent content, LicenseStore store) throws Exception {
            // 当许可证有效时的回调
        }
 
        @Override
        public void onExpired(LicenseContent content, LicenseStore store) throws Exception {
            // 当许可证过期时的回调
            throw new Exception("License已过期。");
        }
    }
}

这个代码示例展示了如何使用自定义的DefaultLicenseCallback来实现只验证许可证的有效期的方法。在verify方法中，我们只比较当前日