java DOM4J 读取XML实例代码

下面展示一篇我自己写的一个xml读取测试

import java.util.iterator;
import java.io.bufferedreader;
import java.io.file;
import java.io.ioexception;
import java.io.inputstreamreader;
import java.net.malformedurlexception;
import org.dom4j.*;
import org.dom4j.io.saxreader;

public class xmlread {

    static stringbuilder sbuilder = new stringbuilder();

    public static void main(string[] args) throws ioexception {

        bufferedreader breader = new bufferedreader(new inputstreamreader(
                system.in));
        string path = null;
        system.out.println("请输入xml文件的绝对路径以及文件名:\n");
        path = breader.readline();

        sbuilder.append("开始输出xml文件内容\n");

        document document = null;
        try {
            document = read(path);
            sbuilder.append(path + "\n");
        } catch (malformedurlexception e) {
            e.printstacktrace();
        } catch (documentexception e) {
            e.printstacktrace();
        }

        element root = getrootelement(document);
        if (root == null) {
            system.out.print("没有获取到root节点");
            return;
        }
        // 获取xml文档的编码格式
        string encstring = document.getxmlencoding();
        sbuilder.append("<?xml version=\"1.0\" encoding=\"" + encstring
                + "\">\n");
        sbuilder.append(elementtext(root, atttext(root), 0));

        system.out.println(getiterator(root, 0) + "</" + root.getname() + ">");

    }

    /**
     * 递归节点
     *
     * @description
     * @param element
     * @param lvl
     *            层级
     * @return
     */
    private static string getiterator(element element, int lvl) {

        lvl += 1;

        for (iterator i = element.elementiterator(); i.hasnext();) {
            element e = (element) i.next();
            sbuilder.append(elementtext(e, atttext(e), lvl));
            getiterator(e, lvl);

            int count = e.nodecount();

            if (count > 0) {
                for (int j = 0; j < lvl; j++) {
                    sbuilder.append("    ");
                }
            }
            sbuilder.append("</" + e.getname() + ">\n");
        }

        return sbuilder.tostring();
    }

    /**
     * 获取当前节点的属性的值的字符串
     *
     * @description
     * @param element
     *            当前节点
     * @return
     */
    private static string atttext(element element) {

        string str = " ";
        for (int i = 0; i < element.attributecount(); i++) {
            attribute attribute = element.attribute(i);

            str += attribute.getname() + "=\"" + attribute.getvalue() + "\" ";
        }
        return str;
    }

    /**
     * 获取当前element的文本值
     *
     * @description
     * @param element
     *            当前element节点
     * @param text
     *            属性值
     * @param lvl
     *            层级
     * @return
     */
    private static string elementtext(element element, string text, int lvl) {
        string str = "";
        for (int i = 0; i < lvl; i++) {
            str += "    ";
        }
        str += "<" + element.getname();
        if (text != null && text != "") {
            str += text;
        }
　　　　　//由于dom4j里面没有 haschild这个属性或者方法，所以要用nodecount()这个方法来判断时候还有子节点
        int count = element.nodecount();
        if (count == 0) {
            return str += ">";
        }
        return str += ">\n";
    }

    /**
     *
     * @description 读取xml文件
     * @param file
     *            xml文件路径，包含文件名
     * @return document 文档
     * @throws malformedurlexception
     * @throws documentexception
     */
    public static document read(string file) throws malformedurlexception,
            documentexception {

        saxreader reader = new saxreader();
        document document = reader.read(new file(file));
        return document;
    }

    /**
     * 获取document文档的root节点
     *
     * @param document
     * @return
     */
    public static element getrootelement(document document) {
        return document.getrootelement();
    }

}