tomcat动态映射路径

写了一个工具类,将上传文件功能保存文件的目录移到webapps目录外面,通过动态生成xml映射文件到tomcat\conf\Catalina\localhost目录下从而实现目录映射。可以被http直接访问的文件直接映射,不能被直接访问的通过输入输出流读取。

files.xml文件内容(ps:xml文件名需和path配置的目录名称一样):

<?xml version="1.0" encoding="utf-8"?>
<Context docBase="/E:/apache-tomcat-7.0.61/data/files" path="/files" reloadable="true"/>

这样就可以直接通过http://files/xxx.png访问图片。而/files只是一个映射的路径,可以映射到系统中任何路径.

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import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
 
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;
 
public class FileUtils {
 
    /**
     * 通过class获取本身所在目录的URL
     */
    private static URL url = FileUtils.class.getResource("/");
    /**
     * 获取项目绝对路径
     */
    public static String getProjectPath() {
        String path = url.getPath().split("/WEB-INF")[0];
        return path;
    }
     
    /**
     * 获取tomcat绝对路径
     * @return
     */
    public static String getTomcatPath() {
        String path = getProjectPath();
        path = path.substring(0, path.lastIndexOf("/"));
        path = path.substring(0, path.lastIndexOf("/"));
        return path;
    }
     
    /**
     * 获取Webapps绝对路径
     * @return
     */
    public static String getWebappsPath() {
        String path = getProjectPath();
        path = path.substring(0, path.lastIndexOf("/"));
        return path;
    }
     
    /**
     * 获取data绝对路径
     * @return
     */
    public static String getDataPath() {
        return getTomcatPath() + "/data";
    }
     
    /**
     * 创建虚拟目录的方法--直接设置映射的路径和映射路径
     * @param docBase 被映射的真实路径
     * @param path 映射的路径
     * @throws IOException
     * @throws JDOMException
     */
    public static void setUrlPattern(String docBase, String path) throws IOException {
        String filesPath = docBase + path;
        File file = new File(filesPath);
        if (!file.exists()) {
            file.mkdirs();
        }
        Element root = DocumentHelper.createElement("Context");
        Document document = DocumentHelper.createDocument(root);
        root.addAttribute("docBase", filesPath)
        .addAttribute("path", path)
        .addAttribute("reloadable", "true");
        // 把生成的xml文档存放在硬盘上 true代表是否换行
        OutputFormat format = new OutputFormat();
        format.setEncoding("utf-8");
        StringBuilder savePath = new StringBuilder(getTomcatPath() + "/conf/Catalina/localhost/" + path + ".xml");
        XMLWriter xmlWriter = new XMLWriter(new FileOutputStream(savePath.toString()), format);
        xmlWriter.write(document);
        xmlWriter.close();
    }
     
    /**
     * 创建虚拟目录的方法--直接设置映射的路径,默认映射为files
     * @param docBase 被映射的真实路径,映射的路径默认是files
     * @throws IOException
     * @throws JDOMException
     */
    public static void setUrlPattern(String path) throws IOException {
        setUrlPattern(getDataPath(), path);
    }
    /**
     * 创建虚拟目录的方法--直接设置映射的路径,默认映射为files
     * @param docBase 被映射的真实路径默认<tomcat目录>/data/files目录,映射的路径默认是files
     * @throws IOException
     * @throws JDOMException
     */
    public static void setUrlPattern() throws IOException {
        setUrlPattern(getDataPath(), "files");
    }
     
    public static boolean isUrlPatternExist(String path) {
        StringBuilder savePath = new StringBuilder(getTomcatPath() + "/conf/Catalina/localhost/" + path + ".xml");
        File file = new File(savePath.toString());
        if (file.exists()) {
            return true;
        }
        return false;
    }
     
    public static boolean isUrlPatternExist() {
        StringBuilder savePath = new StringBuilder(getTomcatPath() + "/conf/Catalina/localhost/files.xml");
        File file = new File(savePath.toString());
        if (file.exists()) {
            return true;
        }
        return false;
    }
     
}

 

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