WebDav的java客户端开发包：Jackrabbit

上一篇帖子“WebDav的java客户端开发包：sardine”中说到，对于开发WebDav客户端
sardine是一个很好的选择，但sardine并未实现WevDav的全部规范，所以我又试了试
apache的Jackrabbit，这个是已退休的slide的替代品。
Jackrabbit中的WevDav客户端只是一个附带的模块，并不是Jackrabbit的主要功能，
所以关于开发的文档很少，我只找到一篇：
http://wiki.apache.org/jackrabbit/WebDAV
我是下载的jackrabbit-standalone-2.0.3.jar包，其中应该大部分类都用不到，不过
我没找到单独的WebDav客户端的包。

演示程序的主要处理就是创建了一个目录，然后上载了jpg文件，最后列出了创建目录
中的内容。其中创建目录要用MkCol命令，上载用Put命令，列出目录内容其实是列出
指定路径下的所有属性。我没有仔细研究过WebDav的规范，估计jackrabbit是按照规范
实现的，需要理解WebDav的规范才能很好地使用，sardine则要接近对WebDav的一般性
理解，不需要理解相应的规范就可以快速地开始使用。

下面就是我的演示程序代码：

package test;

import java.io.FileInputStream;
import java.io.IOException;

import org.apache.commons.httpclient.Credentials;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.UsernamePasswordCredentials;
import org.apache.commons.httpclient.auth.AuthScope;
import org.apache.commons.httpclient.methods.InputStreamRequestEntity;
import org.apache.commons.httpclient.methods.RequestEntity;
import org.apache.jackrabbit.webdav.DavConstants;
import org.apache.jackrabbit.webdav.DavException;
import org.apache.jackrabbit.webdav.MultiStatus;
import org.apache.jackrabbit.webdav.MultiStatusResponse;
import org.apache.jackrabbit.webdav.client.methods.DavMethod;
import org.apache.jackrabbit.webdav.client.methods.MkColMethod;
import org.apache.jackrabbit.webdav.client.methods.PropFindMethod;
import org.apache.jackrabbit.webdav.client.methods.PutMethod;

public class TestJackrabbit {
    public static void main(String[] args) throws IOException, DavException {
        HttpClient client = new HttpClient();
        Credentials creds = new UsernamePasswordCredentials("admin", "admin");
        client.getState().setCredentials(AuthScope.ANY, creds);

        DavMethod mkCol = new MkColMethod("http://192.168.1.71:4502/crx/repository/crx.default/content/dam/testfolder");
        client.executeMethod(mkCol);
        System.out.println("mkcol testfolder:" + mkCol.getStatusCode() + " " + mkCol.getStatusText());

        PutMethod put = new PutMethod("http://192.168.1.71:4502/crx/repository/crx.default/content/dam/testfolder/testimg.jpg");
        RequestEntity requestEntity = new InputStreamRequestEntity(new FileInputStream("img12.jpg"));
        put.setRequestEntity(requestEntity);
        client.executeMethod(put);
        System.out.println("put image file:" + put.getStatusCode() + " " + put.getStatusText());

        DavMethod find = new PropFindMethod("http://192.168.1.71:4502/crx/repository/crx.default/content/dam/testfolder", DavConstants.PROPFIND_ALL_PROP, DavConstants.DEPTH_1);
        client.executeMethod(find);
        MultiStatus multiStatus = find.getResponseBodyAsMultiStatus();
        MultiStatusResponse[] responses = multiStatus.getResponses();
        System.out.println("Folders and files:");
        for (int i=0; i<responses.length; i++) {
            System.out.println(responses[i].getHref());
        }
    }
}