大家好，又见面了，我是你们的朋友全栈君。
下面是完整的代码
import org.apache.catalina.tribes.membership.StaticMember;
import org.apache.xml.serialize.OutputFormat;
import org.apache.xml.serialize.OutputFormat;
import org.apache.xml.serialize.XMLSerializer;
import org.w3c.dom.Document;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
public class XmlFormatter {
public String format(String unformattedXml) {
try {
final Document document = parseXmlFile(unformattedXml);
OutputFormat format = new OutputFormat(document);
format.setLineWidth(65);
format.setIndenting(true);
format.setIndent(2);
Writer out = new StringWriter();
XMLSerializer serializer = new XMLSerializer(out, format);
serializer.serialize(document);
return out.toString();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
private Document parseXmlFile(String in) {
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
InputSource is = new InputSource(new StringReader(in));
return db.parse(is);
} catch (ParserConfigurationException e) {
throw new RuntimeException(e);
} catch (SAXException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static void main(String[] args) throws Exception{
String s = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><PARAM><DBID>35</DBID><SEQUENCE>atgtca</SEQUENCE><MAXNS>10</MAXNS><MINIDENTITIES>90</MINIDENTITIES><MAXEVALUE>10</MAXEVALUE><USERNAME>admin</USERNAME><PASSWORD>111111</PASSWORD><TYPE>P</TYPE><RETURN_TYPE>2</RETURN_TYPE></PARAM>";//未格式化前的xml
System.out.println(new XmlFormatter().format(s));
}
}
输出结果是：
<?xml version="1.0" encoding="UTF-8"?>
<PARAM>
<DBID>35</DBID>
<SEQUENCE>atgtca</SEQUENCE>
<MAXNS>10</MAXNS>
<MINIDENTITIES>90</MINIDENTITIES>
<MAXEVALUE>10</MAXEVALUE>
<USERNAME>admin</USERNAME>
<PASSWORD>111111</PASSWORD>
<TYPE>P</TYPE>
<RETURN_TYPE>2</RETURN_TYPE>
</PARAM>
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