Question

java环境中使用XQuery,是用datadirect.jar的，不知道要查询的xml文档名写在哪儿，请高手指点一下~

package xquerytester;

import javax.xml.namespace.QName;
import java.util.Properties;

import com.ddtek.xquery3.XQConnection;
import com.ddtek.xquery3.XQException;
import com.ddtek.xquery3.XQExpression;
import com.ddtek.xquery3.XQItemType;
import com.ddtek.xquery3.XQSequence;
import com.ddtek.xquery3.xqj.DDXQDataSource;

public class XQueryTester {

// Filename for XML document to query
private String filename;

// Data Source for querying
private DDXQDataSource dataSource;

// Connection for querying
private XQConnection conn;

public XQueryTester(String filename) {
this.filename = filename;
}

public void init() throws XQException {
dataSource = new DDXQDataSource();
conn = dataSource.getConnection();
}

public String query(String queryString) throws XQException {
XQExpression expression = conn.createExpression();
expression.bindString(new QName("docName"), filename,
conn.createAtomicType(XQItemType.XQBASETYPE_STRING));
XQSequence results = expression.executeQuery(queryString);
return results.getSequenceAsString(new Properties());
}

public static void main(String[] args) {
if (args.length != 1) {
System.err.println("Usage: java ibm.dw.xqj.XQueryTester [XML filename]");
System.exit(-1);
}

try {
String xmlFilename = args[0];
XQueryTester tester = new XQueryTester(xmlFilename);
tester.init();

final String sep = System.getProperty("line.separator");
String queryString =
"declare variable $docName as xs:string external;" + sep +
" for $cd in doc($docName)/CATALOG/CD " +
" where $cd/YEAR > 1980 " +
" and $cd/COUNTRY = 'USA' " +
" order by $cd/YEAR " +
" return " +
"<cd><title>{$cd/TITLE/text()}</title>" +
" <year>{$cd/YEAR/text()}</year></cd>";
System.out.println(tester.query(queryString));
} catch (Exception e) {
e.printStackTrace(System.err);
System.err.println(e.getMessage());
}
}
}

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Answer 1

不用打开的是使用cmd执行命令使用这个jar包的。具体如下：

用AXMLPrinter2.jar反编译xxx.xml文件
解压xxx.apk,选择main.xml(也可选择其它xml文件，不过xml文件都是乱码)，复制到AXMLPrinter2.jar所在目录，通过cmd进入到AXMLPrinter2.jar所在目录，使用如下命令，得到的main.txt就是反编译后的文件，现在可以看懂了。
java -jar AXMLPrinter2.jar main.xml > main.txt

Answer 2

我给你个例子吧。。。 import javax.xml.parsers.*; import org.w3c.dom.*; import org.xml.sax.SAXException; import java.io.*; public class XMLUtil { //该方法用于从XML配置文件中提取具体类类名,并返回一个实例对象 public static...