关键技术点和体会:

压缩的结果采用Base64编码，方便在Java端或者C#端打印出来调试，也方便在不同的应用间传输（如webservice），缺点是比转码前体积变大了约35%
字符串采用UTF-8编码获得byte数组，保证两端通用，如果应用对编码有要求，两端同时改为其他编码方式也可以
从Java和C#的代码看，两者代码上有细微差别，但是思路方面两者基本是一样的
另外一个备忘，Java里边，Stream类要及时close，不然输出的结果是不完整的，即使调用了flush
C#的using真好用，Java的类似语言特性在1.7才支持…
Java，用Session Bean建立了一个简单的WebService，提供一个简单的调用SayHello，然后C#里建立一个winform应用，添加服务引用，引用Java的webservice WSDL。

具体过程不多说，代码如下：

Java代码：

[javascript]
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

import javax.ejb.Stateless;
import javax.jws.WebMethod;
import javax.jws.WebService;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

@Stateless
@WebService
public class TestWebService {

@WebMethod
public String SayHello(String name) throws Exception {

String t = uncompress(name);
return compress(“解压：” + t);

}

@WebMethod(exclude = true)
public static String compress(String str) throws IOException {
if (str == null || str.length() == 0) {
return “”;
}

byte[] tArray;
ByteArrayOutputStream out = new ByteArrayOutputStream();
GZIPOutputStream gzip = new GZIPOutputStream(out);
try {
gzip.write(str.getBytes(“UTF-8”));
gzip.flush();
} finally {
gzip.close();
}

tArray = out.toByteArray();
out.close();

BASE64Encoder tBase64Encoder = new BASE64Encoder();
return tBase64Encoder.encode(tArray);
}

@WebMethod(exclude = true)
public static String uncompress(String str) throws IOException {
if (str == null || str.length() == 0) {
return “”;
}

BASE64Decoder tBase64Decoder = new BASE64Decoder();
byte[] t = tBase64Decoder.decodeBuffer(str);

ByteArrayOutputStream out = new ByteArrayOutputStream();
ByteArrayInputStream in = new ByteArrayInputStream(t);
GZIPInputStream gunzip = new GZIPInputStream(in);
try {
byte[] buffer = new byte[256];
int n;
while ((n = gunzip.read(buffer)) >= 0) {
out.write(buffer, 0, n);
}
}finally{
gunzip.close();
}
in.close();
out.close();

return out.toString(“UTF-8”);
}

}

 

C#的代码：

[csharp]
using System;
using System.IO;
using System.IO.Compression;
using System.Text;
using System.Windows.Forms;
using testWebService.ServiceReference1;

namespace testWebService
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void btnSayOK_Click(object sender, EventArgs e)
{

string name = txtName.Text;
string zipedName = Zip(name);

TestWebServiceClient client = new TestWebServiceClient();
string result = client.SayHello(zipedName);
MessageBox.Show(UnZip(result));
}

public static string Zip(string value)
{
byte[] byteArray = Encoding.UTF8.GetBytes(value);
byte[] tmpArray;

using (MemoryStream ms = new MemoryStream())
{
using (GZipStream sw = new GZipStream(ms, CompressionMode.Compress))
{
sw.Write(byteArray, 0, byteArray.Length);
sw.Flush();
}
tmpArray = ms.ToArray();
}
return Convert.ToBase64String(tmpArray);
}

public static string UnZip(string value)
{
byte[] byteArray = Convert.FromBase64String(value);
byte[] tmpArray;

using (MemoryStream msOut = new MemoryStream())
{
using (MemoryStream msIn = new MemoryStream(byteArray))
{
using (GZipStream swZip = new GZipStream(msIn, CompressionMode.Decompress))
{
swZip.CopyTo(msOut);
tmpArray = msOut.ToArray();
}
}
}
return Encoding.UTF8.GetString(tmpArray);
}
}
}