使用java NIO及高速缓冲区写入文件过程解析

这篇文章主要介绍了使用java nio及高速缓冲区写入文件过程解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

代码如下

byte[] bytes = files.readallbytes(paths.get("e:\\pdf\\aaa\\html\\text.txt").normalize());
    string text = ioutils.tostring(bytes);
    string xml = text.substring(text.indexof("<tbody>"));
    inputsource inputxml = new inputsource( new stringreader( xml ) );
    xpath xpath = xpathfactory.newinstance().newxpath();
    nodelist nodes = (nodelist) xpath.evaluate("/tbody/tr", inputxml, xpathconstants.nodeset);
    int length = nodes.getlength();
    path file = paths.get("e:\\pdf\\aaa\\html\\out.txt");
    try (bufferedwriter writer = files.newbufferedwriter(file, charset.defaultcharset(), standardopenoption.create)) {
      for (int i = 0; i < length; i++) {
        node node = nodes.item(i);
        nodelist childlist = (nodelist) xpath.evaluate("td", node, xpathconstants.nodeset);
        for (int j = 0; j < childlist.getlength(); j++) {
          node child = childlist.item(j);
          string content = child.gettextcontent();
          //system.out.print(content);
          writer.write(content);
          if (j <childlist.getlength() - 1) {
            writer.write("\t");
          }
        }
        writer.newline();
      }
    }

text.txt内容

输出内容：

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