Map<String,String> configMap = new HashMap<String,String>();

System.out.println("JSON.toJSONString(configMap) is  " + JSON.toJSONString(configMap)); //第一種 import com.alibaba.fastjson.JSON;
System.out.println("JsonUtils.toJson(configMap) is  " + JsonUtils.toJson(configMap)); //第二種 import com.pisgah.common.util.JsonUtils;
 

try{
     byte byteXl[]  = JSON.toJSONString(configMap).getBytes("UTF-8"); //字符串轉化為一個字節數組byte[]
     Base64 encoder = new Base64();
     String encodedStr = encoder.encodeToString(byteXl); //第一種 轉Base64
     System.out.println("encodedStr is  " + encodedStr);
     String base64EncStr= new String (Base64.encodeBase64(byteXl),"UTF-8"); //第二種 轉Base64
 
     System.out.println("base64EncStr is  " + base64EncStr);
 }catch(Exception e){
     e.printStackTrace();
 }
例：

    public static void main(String[] args) {

        Map<String,String> configMap = new HashMap<String,String>();
        configMap.put("merch","000001110100000812");
        configMap.put(
 
"path","F:/keypath/test_yufu_nonca.cer");
        System.out.println("configMap is  " + configMap);
        String jsonString = JSON.toJSONString(configMap);
        System.out.println("JSON.toJSONString(configMap) is  " + jsonString);
        String json = JsonUtils.toJson(configMap);
        System.out.println("JsonUtils.toJson(configMap) is  " + json);
        try{
          byte byteXl[]  = JSON.toJSONString(configMap).getBytes("UTF-8");
            System.out.println("configMap is  " + byteXl);
            Base64 encoder = new Base64();
            String encodedStr = encoder.encodeToString(byteXl);
            System.out.println("encodedStr is  " + encodedStr);
            String base64EncStr= new String (Base64.encodeBase64(byteXl),"UTF-8");
            System.out.println("base64EncStr is  " + base64EncStr);
        }catch(Exception e){
            e.printStackTrace();
        }
}

結果：
configMap is  {merch=000001110100000812, path=F:/keypath/test_yufu_nonca.cer}
JSON.toJSONString(configMap) is  {"merch":"000001110100000812","path":"F:/keypath/test_yufu_nonca.cer"}
JsonUtils.toJson(configMap) is  {"merch":"000001110100000812","path":"F:/keypath/test_yufu_nonca.cer"}
configMap is  [B@7a36aefa
encodedStr is  eyJtZXJjaCI6IjAwMDAwMTExMDEwMDAwMDgxMiIsInBhdGgiOiJGOi9rZXlwYXRoL3Rlc3RfeXVmdV9ub25jYS5jZXIifQ==
base64EncStr is  eyJtZXJjaCI6IjAwMDAwMTExMDEwMDAwMDgxMiIsInBhdGgiOiJGOi9rZXlwYXRoL3Rlc3RfeXVmdV9ub25jYS5jZXIifQ==

Map<String,String>轉Json轉Base64