Question

给出一个字符串：

<APP START="2014-08-25 13:45:58" SINCE="2014-08-25 13:45:58" STATE="Running" NAME="abc" ID="4305" Codebase="www.domain.com" Build-Revision="3d6ca1de3ce6d9832bc314356e54038bb8cab342" Build-Path="UNKNOWN" Build-Label="128.3" Build-Date="2014-08-16 20:03:34" Permissions="all-permissions">
<Runtime NUM_PROCESSORS="12" TOTAL_MEMORY="8588886016" MAX_MEMORY="8588886016" FREE_MEMORY="4902842840"/>
</APP>

如何申请Build-Label？

的价值

Answer 1

您可以使用javax.xml.xpath API：

import java.io.StringReader;
import javax.xml.xpath.*;
import org.xml.sax.*;

public class Demo {

    private static String XML = "<APP START='2014-08-25 13:45:58' SINCE='2014-08-25 13:45:58' STATE='Running' NAME='abc' ID='4305' Codebase='www.domain.com' Build-Revision='3d6ca1de3ce6d9832bc314356e54038bb8cab342' Build-Path='UNKNOWN' Build-Label='128.3' Build-Date='2014-08-16 20:03:34' Permissions='all-permissions'><Runtime NUM_PROCESSORS='12' TOTAL_MEMORY='8588886016' MAX_MEMORY='8588886016' FREE_MEMORY='4902842840'/></APP>";

    public static void main(String[] args) throws Exception {
        XPath xpath = XPathFactory.newInstance().newXPath();
        InputSource xml = new InputSource(new StringReader(XML));
        String result = (String) xpath.evaluate("//@Build-Label", xml, XPathConstants.STRING);
        System.out.println(result);
    }

}

Answer 2

我总是尝试使用JAXB来编组XML代码，然后我就可以简单地访问属性值。

通过密钥从XML中检索数据，需要澄清

2 个答案: