可以参考以下的代码示例解决此问题：

import java.security.; import java.security.spec.;

public class EcdsaVerify {

public static void main(String[] args) throws Exception {
    
    // Use P-256 curve
    String algorithm = "SHA256withECDSA";
    Signature signature = Signature.getInstance(algorithm);
    
    // Generate key pair
    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("EC");
    ECGenParameterSpec ecGenParameterSpec = new ECGenParameterSpec("secp256r1");
    keyPairGenerator.initialize(ecGenParameterSpec);
    KeyPair keyPair = keyPairGenerator.generateKeyPair();
    PublicKey publicKey = keyPair.getPublic();
    PrivateKey privateKey = keyPair.getPrivate();
    
    // Create data to sign
    byte[] data = "Hello, World!".getBytes("UTF-8");
    
    // Sign the data with private key
    signature.initSign(privateKey);
    signature.update(data);
    byte[] signatureBytes = signature.sign();

    // Verify the signature with public key
    signature.initVerify(publicKey);
    signature.update(data);
    boolean verified = signature.verify(signatureBytes);
    System.out.println("Verified: " + verified);
}

}

此代码中使用了ECDSA算法来生成椭圆P256签名。生成和验证签名的过程中使用了公钥和私钥。如果运行代码没有报错，就表示签名验证成功。