java DSA加密算法公共类，线上环境已成功运行

具体使用方法如下

import java.util.Map;

public class DSACoderMain {
    public static void main(String[] args) throws Exception {
        String inputStr = "abc";  
        byte[] data = inputStr.getBytes();  
  
        // 构建密钥  
        Map<String, Object> keyMap = DSACoder.initKey();  
  
        // 获得密钥  
        String publicKey = DSACoder.getPublicKey(keyMap);  
        String privateKey = DSACoder.getPrivateKey(keyMap);  
  
        System.err.println("publicKey:\r" + publicKey);  
        System.err.println("privateKey:\r" + privateKey);  
  
        // 产生签名  
        String sign = DSACoder.sign(data, privateKey);  
        System.err.println("签名:\r" + sign);  
  
        // 验证签名  
        boolean status = DSACoder.verify(data, publicKey, sign);  
        System.err.println("状态:\r" + status);  
    }
}