增加XML字符串格式化

basic-util/src/main/java/ink/wgink/util/xml/XMLUtil.java

@@ -1,15 +1,19 @@
 package ink.wgink.util.xml;
 
+import ink.wgink.exceptions.base.SystemException;
 import ink.wgink.util.ReflectUtil;
-import org.apache.commons.collections.KeyValue;
 import org.apache.commons.lang3.StringUtils;
 import org.dom4j.Document;
 import org.dom4j.DocumentException;
+import org.dom4j.DocumentHelper;
 import org.dom4j.Element;
+import org.dom4j.io.OutputFormat;
 import org.dom4j.io.SAXReader;
+import org.dom4j.io.XMLWriter;
 
 import java.io.ByteArrayInputStream;
-import java.io.InputStream;
+import java.io.IOException;
+import java.io.StringWriter;
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.nio.charset.StandardCharsets;
@@ -72,4 +76,30 @@ public class XMLUtil {
         return t;
     }
 
+    /**
+     * 格式化XML字符串
+     *
+     * @param xml
+     * @return
+     */
+    public static String formatXmlString(String xml) {
+        StringWriter writer = new StringWriter();
+        try {
+            OutputFormat format = OutputFormat.createPrettyPrint();
+            Document document = DocumentHelper.parseText(xml);
+            // 格式化输出格式
+            format.setEncoding("UTF-8");
+            // 格式化输出流
+            XMLWriter xmlWriter = new XMLWriter(writer, format);
+            // 将document写入到输出流
+            xmlWriter.write(document);
+            xmlWriter.close();
+        } catch (DocumentException e) {
+            throw new SystemException(e);
+        } catch (IOException e) {
+            throw new SystemException(e);
+        }
+        return writer.toString();
+    }
+
 }