Java WS和C#调用

2022-07-15 80酷酷网 80kuku.com

文章中的WS服务使得这个服务可以在DotNet环境中调用.

文件清单:

SEI接口类IImage.java,实现SEI接口的类IIMageImpl.java,描述文件信息的值类型类FileInfo.java,Web应用部署描述文件web.xml,WS发布配置文件jaxrpc-ri.xml,WS编译配置文件config-interface.xml,构建客户端桩的config-wsdl.xml,构建文件builder.xml

客户端测试类:Form1.cs.

本例是从WSDL开始的,因此我们要有一个WSDL文件.第一步就是得到这个文件.

(一) 得到WSDL文件.

为达到互操作要求,这个文件的描述必须是文档样式的绑定,文字格式的编码.为得到此文件,首先介绍构建文件builder.xml:

<?xml version="1.0" encoding="GBK"?>
<project name="webservice" default="build" basedir=".">
<property name="jaxrpc.lib.dir" value="I:\jwsdp-1.6\jaxrpc\lib">
</property>
<property name="jaxrpc.lib.dir1" value="D:\Sun\AppServer\lib">
</property>
<property name="classes.dir" value=".\build\classes">
</property>
<property name="src.dir" value=".\build\src">
</property>
<property name="raw.war.file" value="netservice-raw.war">
</property>
<property name="cook.war.file" value="netservice.war">
</property>
<property name="nonclass.dir" value=".\build\nonclass">
</property>
<property name="build" value="${nonclass.dir}">
</property>
<property name="assemble" value=".\assemble">
</property>
<property name="assemble.war" value=".\assemble\war">
</property>
<property name="assemble.ear" value=".\assemble\ear">
</property>
<property name="wsi.dir" value=".\wsi">
</property>
<property name="wsi.server.dir" value=".\wsi\server">
</property>
<property name="wsi.client.dir" value=".\wsi\client">
</property>
<property name="tmp.dir" value=".\tmp">
</property>

</path>
<taskdef name="wscompile" classpatmessage="build the WAR...." />
  <wscompile import="false" features="wsi,documentliteral" define="true" gen="false" keep="true" base="${classes.dir}" sourceBase="${src.dir}" classpath=".\classes" nonClassDir="${nonclass.dir}" model="model.xml.gz" xPrintStackTrace="true" config="config-interface.xml" verbose="true">
   <classpath refid="compile.classpath" />
  </wscompile>
</target>

在这个构建文件中的build任务中, features的值指定为"wsi,documentliteral",这个任务需要的config-interface.xml:

<?xml version="1.0" encoding="UTF-8"?>
<configuration xmlns="http://java.sun.com/xml/ns/jax-rpc/ri/config">
<service name="BinaryService" targetNamespace="urn:binary"
  typeNamespace="urn:binary" packageName="com.binary">
  <interface name="com.bin.IImage"
   servantName="com.bin.ImageImpl" />
</service>
</configuration>

这个文件的需要的com.bin.IImage SEI接口文件及其实现文件com.bin.ImageImpl:

public interface IImage extends Remote {
//public DataHandler fetchImg(String sn) throws RemoteException;
//public DataHandler[] fetchImgs(String[] sn) throws RemoteException;
public SOAPMessage construcMsg(String[] fn) throws RemoteException;
public byte[] fetchImage(String sn) throws RemoteException;
public FileInfo[] fetchFileList() throws java.rmi.RemoteException;
public FileInfo getFileList(String fn) throws java.rmi.RemoteException;
}

DataHandler,ArrayList属于java的类当然不允许出现在接口中了,因为C#不认识这些类,FileInfo值类型类倒支持,因为这个类没有方法,而且数据类型都是可以用SOAP来表示的,C#是可以理解的.

实现文件,注意实现的方法是空方法.

public class ImageImpl implements IImage {
public SOAPMessage construcMsg(String[] fn) throws RemoteException {
   return null;
  }
public byte[] fetchImage(String sn) throws RemoteException{
  return null;
}
public FileInfo[] fetchFileList() throws java.rmi.RemoteException{
  return null;
}
  public FileInfo getFileList(String fn) throws RemoteException {
  return null;
  }
}

到这里,为互操作所做的修改只是在 features的值指定为"wsi,documentliteral",其它地方没有修改包括config-interface.xml接口配置文件.

通过执行这个任务,可以得到我们想要的BinaryService.wsdl文件.位于nonclass文件夹中,把它移动到conf中.

(二) 构造Web服务

在这个conf文件夹中除了有BinaryService.wsdl外,还有两个文件:

config-client.xml,用来根据WSDL文件生成客户端访问服务所需要的制品.

<?xml version="1.0" encoding="UTF-8"?>
<configuration xmlns="http://java.sun.com/xml/ns/jax-rpc/ri/config">
<wsdl
location="http://localhost:8080/netservice/binary?WSDL"
packageName="wsidotnet" />
</configuration>

config-server.xml则用来根据BinaryService.wsdl生成服务器端制品,包括重新生成的SEI接口文件,我们将利用这个文件编写服务实现,而不是前面提到的com.bin.IImage SEI接口文件及其实现文件com.bin.ImageImpl:

<?xml version="1.0" encoding="UTF-8"?>
<configuration xmlns="http://java.sun.com/xml/ns/jax-rpc/ri/config">
<wsdl location="web-inf/conf/BinaryService.wsdl"
packageName="wsidotnet" />
</configuration>

到目前为止,还有两个文件没有提供:

jaxrpc-ri.xml:

<?xml version="1.0" encoding="UTF-8"?>
<webServices xmlns="http://java.sun.com/xml/ns/jax-rpc/ri/dd"
version="1.0"
targetNamespaceBase="http://java.sun.com/xml/ns/jax-rpc/wsi/wsdl"
typeNamespaceBase="http://java.sun.com/xml/ns/jax-rpc/wsi/types"
urlPatternBase="/ws">

web.xml文件:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<context-param>
  <param-name>BinaryPath</param-name>
  <param-value>更改成你的本地文件路径</param-value>
</context-param>
<welcome-file-list>
  <welcome-file>index.htm</welcome-file>
  <welcome-file>index.jsp</welcome-file>
  <welcome-file>index.jws</welcome-file>
</welcome-file-list>
</web-app>

下面就是构建过程,首先,执行wsi server service得到服务器端的java制品,包括重新生成的SEI,wscompile还生成了一个实现文件IImage_Impl ,后面要修改这个类,在其中加入有用的方法.

wsidotnet.IImage清单:

package wsidotnet;

public interface IImage extends java.rmi.Remote {
    public wsidotnet.ConstrucMsgResponse construcMsg(wsidotnet.ConstrucMsg parameters) throws
         java.rmi.RemoteException;
    public wsidotnet.FetchFileListResponse fetchFileList(wsidotnet.FetchFileList parameters) throws
         java.rmi.RemoteException;
    public wsidotnet.FetchImageResponse fetchImage(wsidotnet.FetchImage parameters) throws
         java.rmi.RemoteException;
    public wsidotnet.GetFileListResponse getFileList(wsidotnet.GetFileList parameters) throws
         java.rmi.RemoteException;
}

和前面的com.bin.IImage接口相比很不同了.因为采用文档样式的绑定,所以这里就产生了所谓的包装类了.

实现文件为:

package wsidotnet;

import java.io.File;
import java.io.FileInputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.util.Calendar;
import java.util.Date;

import javax.servlet.ServletContext;
import javax.xml.rpc.ServiceException;
import javax.xml.rpc.server.ServiceLifecycle;
import javax.xml.rpc.server.ServletEndpointContext;

public class IImage_Impl implements wsidotnet.IImage, java.rmi.Remote,ServiceLifecycle {
ServletEndpointContext servletEndpointContext = null;

String binarypath = "";

ServletContext servletContext = null;

    public wsidotnet.ConstrucMsgResponse construcMsg(wsidotnet.ConstrucMsg parameters) throws
         java.rmi.RemoteException {

        wsidotnet.ConstrucMsgResponse _retVal = null;
        return _retVal;
    }
    public wsidotnet.FetchFileListResponse fetchFileList(wsidotnet.FetchFileList parameters) throws
         java.rmi.RemoteException {
        wsidotnet.FetchFileListResponse _retVal = new FetchFileListResponse();
        _retVal.setResult(fetchFileList());
        return _retVal;
    }
    public wsidotnet.FetchImageResponse fetchImage(wsidotnet.FetchImage parameters) throws
         java.rmi.RemoteException {
        wsidotnet.FetchImageResponse _retVal = new FetchImageResponse();
        _retVal.setResult(fetchImage(parameters.getString_1()));
        return _retVal;
    }

    public wsidotnet.GetFileListResponse getFileList(wsidotnet.GetFileList parameters) throws
         java.rmi.RemoteException {

        wsidotnet.GetFileListResponse _retVal = null;
        return _retVal;
    }
private FileInfo[] fetchFileList() {
  File file = new File(this.binarypath);
  System.out.println(this.binarypath);
  File[] c = file.listFiles();
  FileInfo[] fis = new FileInfo[c.length];
  for (int i = 0; i < c.length; i++) {
   FileInfo fi = new FileInfo();
   fi.setIsdir(c[i].isDirectory());
   fi.setFilename(c[i].getName());
   fi.setFilelength(c[i].length());
   fi.setFilepath(c[i].getAbsolutePath());
   Calendar cal=Calendar.getInstance();
   cal.setTime(new Date(c[i].lastModified()));
   fi.setCreatedate(cal);
   fis[i] = fi;
  }
  return fis;
}

private byte[] fetchImage(String sn) {
  File file = new File(sn);
  byte[] b=null;
  MappedByteBuffer buffer = null;
  try {
   FileInputStream is = new FileInputStream(file);
   b=new byte[(int)file.length()];
   is.read(b,0,(int)file.length());
   /*
   FileChannel fc = is.getChannel();
   buffer = fc.map(FileChannel.MapMode.READ_ONLY, 0, file.length());
   buffer.get
   */
  } catch (Exception ex) {
   System.out.println(ex);
  }
  //return buffer.array();
  return b;
}

public void destroy() {
  // TODO Auto-generated method stub
  servletEndpointContext = null;
  servletContext = null;
}
public void init(Object arg0) throws ServiceException {
  // TODO Auto-generated method stub
  servletEndpointContext = (ServletEndpointContext) arg0;
  servletContext = servletEndpointContext.getServletContext();
  binarypath = servletContext.getInitParameter("BinaryPath");
}
}

这里展示的实现类,已经过修改,让它扩展了ServiceLifecycle接口,以便运行环境送给它小金豆.这里就是获得了文件路径.此外,还提供了两个私有方法:fetchImage,fetchFileList用于具体执行功能,这里也可以把这两个方法移动到一个新类,然后IImage_Impl使用这个新类,使IImage_Impl类变成调用者对外部类的适配器,这样就形成了一个适配器模式.

完成以上修改后,继续执行Ant 任务:create-war,deploy后,得到了可供发布的netservice.war进行发布.本例使用Tomcat5,检查http://localhost:8080/netservice/binary?WSDL是否装入.
发布成功后,用VS新建一个C#项目,通过这个地址http://localhost:8080/netservice/binary?WSDL引用这个服务,然后编写以下类:

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using testws.binary;

namespace testws
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
  private System.Windows.Forms.Button button1;
  private System.Windows.Forms.ListBox listBox1;
  private System.Windows.Forms.PictureBox pictureBox1;
  private System.Windows.Forms.StatusBar statusBar1;
  private System.Windows.Forms.StatusBarPanel statusBarPanel1;
  private System.Windows.Forms.StatusBarPanel statusBarPanel2;

  testws.binary.IImageBinding imagelist;
  private System.Windows.Forms.Panel panel1;
  private System.Windows.Forms.Panel panel2;
  private System.Windows.Forms.Panel panel3;
  private System.Windows.Forms.Panel panel4;
  private System.Windows.Forms.Splitter splitter1;
  /// <summary>
  /// 必需的设计器变量。
  /// </summary>
  private System.ComponentModel.Container components = null;

  public Form1()
  {
   //
   // Windows 窗体设计器支持所必需的
   //
   InitializeComponent();

   //
   // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
   //
  }

  /// <summary>
  /// 清理所有正在使用的资源。
  /// </summary>
  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if (components != null)
    {
     components.Dispose();
    }
   }
   base.Dispose( disposing );
  }

  #region Windows 窗体设计器生成的代码
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {
   this.button1 = new System.Windows.Forms.Button();
   this.listBox1 = new System.Windows.Forms.ListBox();
   this.pictureBox1 = new System.Windows.Forms.PictureBox();
   this.statusBar1 = new System.Windows.Forms.StatusBar();
   this.statusBarPanel1 = new System.Windows.Forms.StatusBarPanel();
   this.statusBarPanel2 = new System.Windows.Forms.StatusBarPanel();
   this.panel1 = new System.Windows.Forms.Panel();
   this.panel2 = new System.Windows.Forms.Panel();
   this.panel3 = new System.Windows.Forms.Panel();
   this.panel4 = new System.Windows.Forms.Panel();
   this.splitter1 = new System.Windows.Forms.Splitter();
   ((System.ComponentModel.ISupportInitialize)(this.statusBarPanel1)).BeginInit();
   ((System.ComponentModel.ISupportInitialize)(this.statusBarPanel2)).BeginInit();
   this.panel1.SuspendLayout();
   this.panel2.SuspendLayout();
   this.panel3.SuspendLayout();
   this.panel4.SuspendLayout();
   this.SuspendLayout();
   //
   // button1
   //
   this.button1.Location = new System.Drawing.Point(24, 8);
   this.button1.Name = "button1";
   this.button1.Size = new System.Drawing.Size(56, 23);
   this.button1.TabIndex = 0;
   this.button1.Text = "装入";
   this.button1.Click += new System.EventHandler(this.button1_Click);
   //
   // listBox1
   //
   this.listBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
   this.listBox1.Dock = System.Windows.Forms.DockStyle.Fill;
   this.listBox1.ItemHeight = 12;
   this.listBox1.Location = new System.Drawing.Point(0, 0);
   this.listBox1.Name = "listBox1";
   this.listBox1.Size = new System.Drawing.Size(136, 230);
   this.listBox1.TabIndex = 1;
   this.listBox1.SelectedIndexChanged += new System.EventHandler(this.listBox1_SelectedIndexChanged);
   //
   // pictureBox1
   //
   this.pictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
   this.pictureBox1.Dock = System.Windows.Forms.DockStyle.Fill;
   this.pictureBox1.Location = new System.Drawing.Point(0, 0);
   this.pictureBox1.Name = "pictureBox1";
   this.pictureBox1.Size = new System.Drawing.Size(261, 231);
   this.pictureBox1.TabIndex = 2;
   this.pictureBox1.TabStop = false;
   //
   // statusBar1
   //
   this.statusBar1.Location = new System.Drawing.Point(0, 271);
   this.statusBar1.Name = "statusBar1";
   this.statusBar1.Panels.AddRange(new System.Windows.Forms.StatusBarPanel[] {
                        this.statusBarPanel1,
                        this.statusBarPanel2});
   this.statusBar1.ShowPanels = true;
   this.statusBar1.Size = new System.Drawing.Size(400, 22);
   this.statusBar1.TabIndex = 3;
   this.statusBar1.Text = "statusBar1";
   //
   // statusBarPanel1
   //
   this.statusBarPanel1.AutoSize = System.Windows.Forms.StatusBarPanelAutoSize.Contents;
   this.statusBarPanel1.Width = 10;
   //
   // statusBarPanel2
   //
   this.statusBarPanel2.AutoSize = System.Windows.Forms.StatusBarPanelAutoSize.Spring;
   this.statusBarPanel2.Width = 374;
   //
   // panel1
   //
   this.panel1.Controls.Add(this.listBox1);
   this.panel1.Dock = System.Windows.Forms.DockStyle.Left;
   this.panel1.Location = new System.Drawing.Point(0, 0);
   this.panel1.Name = "panel1";
   this.panel1.Size = new System.Drawing.Size(136, 231);
   this.panel1.TabIndex = 4;
   //
   // panel2
   //
   this.panel2.Controls.Add(this.button1);
   this.panel2.Dock = System.Windows.Forms.DockStyle.Top;
   this.panel2.Location = new System.Drawing.Point(0, 0);
   this.panel2.Name = "panel2";
   this.panel2.Size = new System.Drawing.Size(400, 40);
   this.panel2.TabIndex = 5;
   //
   // panel3
   //
   this.panel3.Controls.Add(this.panel4);
   this.panel3.Controls.Add(this.splitter1);
   this.panel3.Controls.Add(this.panel1);
   this.panel3.Dock = System.Windows.Forms.DockStyle.Fill;
   this.panel3.Location = new System.Drawing.Point(0, 40);
   this.panel3.Name = "panel3";
   this.panel3.Size = new System.Drawing.Size(400, 231);
   this.panel3.TabIndex = 6;
   //
   // panel4
   //
   this.panel4.Controls.Add(this.pictureBox1);
   this.panel4.Dock = System.Windows.Forms.DockStyle.Fill;
   this.panel4.Location = new System.Drawing.Point(139, 0);
   this.panel4.Name = "panel4";
   this.panel4.Size = new System.Drawing.Size(261, 231);
   this.panel4.TabIndex = 5;
   //
   // splitter1
   //
   this.splitter1.Location = new System.Drawing.Point(136, 0);
   this.splitter1.Name = "splitter1";
   this.splitter1.Size = new System.Drawing.Size(3, 231);
   this.splitter1.TabIndex = 6;
   this.splitter1.TabStop = false;
   //
   // Form1
   //
   this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
   this.ClientSize = new System.Drawing.Size(400, 293);
   this.Controls.Add(this.panel3);
   this.Controls.Add(this.statusBar1);
   this.Controls.Add(this.panel2);
   this.Name = "Form1";
   this.Text = "WS-I Demo---Access Sun WS";
   this.Load += new System.EventHandler(this.Form1_Load);
   ((System.ComponentModel.ISupportInitialize)(this.statusBarPanel1)).EndInit();
   ((System.ComponentModel.ISupportInitialize)(this.statusBarPanel2)).EndInit();
   this.panel1.ResumeLayout(false);
   this.panel2.ResumeLayout(false);
   this.panel3.ResumeLayout(false);
   this.panel4.ResumeLayout(false);
   this.ResumeLayout(false);

}
#endregion

  /// <summary>
  /// 应用程序的主入口点。
  /// </summary>
  [STAThread]
  static void Main()
  {
   Application.Run(new Form1());
  }

  private void Form1_Load(object sender, System.EventArgs e)
  {
   listBox1.Items.Clear();
   panel4.AutoScroll =true;
   pictureBox1.SizeMode= PictureBoxSizeMode.AutoSize;
   imagelist=new testws.binary.IImageBinding();
  }

  private void button1_Click(object sender, System.EventArgs e)
  {
   testws.binary.fetchFileList fl=new fetchFileList();
   listBox1.Items.Clear();
   //testws.binary.
   FileInfo[] fis= imagelist.fetchFileList(fl);
   if(fis!=null)
    Console.WriteLine(fis.Length);

   foreach(FileInfo info in fis)
   {
    //Console.WriteLine(info.filepath+"   "+ info.createdate);
    listBox1.Items.Add(info.filepath);
   }

//testws.binary.HelloIFBinding bind=new HelloIFBinding();
}

  private void listBox1_SelectedIndexChanged(object sender, System.EventArgs e)
  {
   ListBox lb=(ListBox)sender;
   if(lb.SelectedItem!=null)
   {
    statusBar1.Panels[0].Text=lb.SelectedItem.ToString();
    testws.binary.fetchImage fn=new fetchImage();
    fn.String_1=lb.SelectedItem.ToString();
    testws.binary.fetchImageResponse res=imagelist.fetchImage(fn);
    try
    {
     System.IO.MemoryStream ms=new System.IO.MemoryStream(res.result);
     Image image=Image.FromStream(ms);
     pictureBox1.Image=image;
     panel4.AutoScrollMinSize=pictureBox1.Size;
    }
    catch(Exception ex)
    {
     Console.WriteLine(ex.StackTrace);
    }
   }
  }
}
}

测试界面:

到此,在C#访问Java WS的过程结束了,实现互操作性关键在于要生成遵守WS-I的javaWeb服务制品,这样的服务才可以跨不同平台操作.