Android 调用.NET Webservice无返回结果解决方案

存在Android 调用.NET Webservice无返回结果问题有2种可能

1、入参名称不同

	[WebMethod(Description = "登录Login")]
        public DataSet Login(string Xming, string pws)
        {}

在java端调用此Login时写的入参名称一定要相同

public InputStream Login(String Xming, String pws) {
		Parameters.clear();
		ParValues.clear();
		// 添加入参
		String methedNmae = "Login";
		Parameters.add("Xming");
}

2、中文乱码问题

java端的utf-8 和。net端的utf-8编码方式不同，导致在java端传入参数时因为中文解码关系出现调用返回无结果情况。在网络上逛了很久才找到解决方法。

步骤一、在java端写一个Base64Code 类来将java端入参加码。

package com.easyread.util;

import java.io.UnsupportedEncodingException;

public class Base64Code {
	
	private static char[] base64EncodeChars = new char[] { 'A', 'B', 'C', 'D',
			'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q',
			'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
			'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q',
			'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3',
			'4', '5', '6', '7', '8', '9', '+', '/' };
	private static byte[] base64DecodeChars = new byte[] { -1, -1, -1, -1, -1,
			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
			-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
			-1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59,
			60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
			10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1,
			-1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,
			38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1,
			-1, -1 };

	public static String encode(byte[] data) {
		StringBuffer sb = new StringBuffer();
		int len = data.length;
		int i = 0;
		int b1, b2, b3;
		while (i < len) {
			b1 = data[i++] & 0xff;
			if (i == len) {
				sb.append(base64EncodeChars[b1 >>> 2]);
				sb.append(base64EncodeChars[(b1 & 0x3) << 4]);
				sb.append("==");
				break;
			}
			b2 = data[i++] & 0xff;
			if (i == len) {
				sb.append(base64EncodeChars[b1 >>> 2]);
				sb.append(base64EncodeChars[((b1 & 0x03) << 4)
						| ((b2 & 0xf0) >>> 4)]);
				sb.append(base64EncodeChars[(b2 & 0x0f) << 2]);
				sb.append("=");
				break;
			}
			b3 = data[i++] & 0xff;
			sb.append(base64EncodeChars[b1 >>> 2]);
			sb.append(base64EncodeChars[((b1 & 0x03) << 4)
					| ((b2 & 0xf0) >>> 4)]);
			sb.append(base64EncodeChars[((b2 & 0x0f) << 2)
					| ((b3 & 0xc0) >>> 6)]);
			sb.append(base64EncodeChars[b3 & 0x3f]);
		}
		return sb.toString();
	}

	public static byte[] decode(String str) throws UnsupportedEncodingException {
		StringBuffer sb = new StringBuffer();
		byte[] data = str.getBytes("US-ASCII");
		int len = data.length;
		int i = 0;
		int b1, b2, b3, b4;
		while (i < len) {

			do {
				b1 = base64DecodeChars[data[i++]];
			} while (i < len && b1 == -1);
			if (b1 == -1)
				break;

			do {
				b2 = base64DecodeChars[data[i++]];
			} while (i < len && b2 == -1);
			if (b2 == -1)
				break;
			sb.append((char) ((b1 << 2) | ((b2 & 0x30) >>> 4)));

			do {
				b3 = data[i++];
				if (b3 == 61)
					return sb.toString().getBytes("iso8859-1");
				b3 = base64DecodeChars[b3];
			} while (i < len && b3 == -1);
			if (b3 == -1)
				break;
			sb.append((char) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2)));

			do {
				b4 = data[i++];
				if (b4 == 61)
					return sb.toString().getBytes("iso8859-1");
				b4 = base64DecodeChars[b4];
			} while (i < len && b4 == -1);
			if (b4 == -1)
				break;
			sb.append((char) (((b3 & 0x03) << 6) | b4));
		}
		return sb.toString().getBytes("iso8859-1");
	}

}

步骤二、入参时如下调用

 

xming=Base64Code.encode(xming.getBytes("utf-8"));
	ParValues.add(xming);

步骤三、在.NET Webservice 中添加解码的方法

public string Base64Decode( string decryptString)
        {
            byte[] decbuff = Convert.FromBase64String(decryptString);
            return System.Text.Encoding.UTF8.GetString(decbuff);
        }

步骤四：将获得的参数解码

[WebMethod(Description = "登录Login")]
        public DataSet Login(string Xming, string pws)
        {
            try
            {
                DataSet ds = new DataSet();
                pws = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(pws, "MD5");
                ds = ExecuteSql("select * from  logintab    where 1=1 and name='" + Base64Decode(Xming) + "' and pwd='" + pws + "'");
                return ds;
            }
            catch(Exception ex)
            {
                throw ex;
            }
        }