c#和java base64不一致的解决方法

{ "contenttype" : "" , "httpmethod" : "post" , "parammap" : "{\"keyword\":\"华为\"}" , "url" : "https:\/\/bizapi.jd测试数据\/api\/search\/search" } --第一条

{ "contenttype" : "" , "httpmethod" : "post" , "parammap" :{ "keyword" : "华为" }, "url" : "https://bizapi.jd测试数据/api/search/search" }  ----第二条

using newtonsoft.json;

using system;

using system.collections.generic;

using system测试数据ponentmodel;

using system.data;

using system.drawing;

using system.linq;

using system.text;

using system.windows.forms;

namespace base64

{

  public partial class form1 : form

  {

   public form1()

   {

    initializecomponent();

   }

   private void button1_click(object sender, eventargs e)

   {

    dictionary<string, string> dic = new dictionary<string, string>();

    dic.add( "cid" , "123456" ); dic.add( "type" , "int" );

    jsonstr jsonstr= new jsonstr(dic, "http://localhost" );

    string result = javabase64(jsonconvert.serializeobject(jsonstr));

   }

   #region 实体类

   /// <summary>

   /// 实体类

   /// </summary>

   class jsonstr

   {

    public string method = "post" ;

    public dictionary<string, string> param;

    public string url = "" ;

    public jsonstr(dictionary<string, string> _param, string _url)

    {

     param = _param; url = _url;

    }

   }

   #endregion

   #region 转换为单字节 java base64

   /// <summary>

   /// 转换为单字节 java base64

   /// </summary>

   /// <param name="str"></param>

   /// <returns></returns>

   public static string javabase64(string str)

   {

    byte [] by = encoding.utf8.getbytes(str);

    sbyte[] sby = new sbyte[by.length];

    for ( int i = 0 ; i < by.length; i++)

    {

     if (by[i] > 127 )

      sby[i] = (sbyte)(by[i] - 256 );

     else

      sby[i] = (sbyte)by[i];

    }

    byte [] newby = ( byte [])(object)sby;

    return convert.tobase64string(newby);

   }

   #endregion

  }

}

{ "contenttype" : "" , "httpmethod" : "post" , "parammap" : "{\"keyword\":\"华为\"}" , "url" : "https:\/\/bizapi.jd测试数据\/api\/search\/search" }