package com.docus.bgts.utils;


import com.docus.bgts.enums.Codes;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import java.io.InputStream;

public class XmlUtils {
    //定义解析器和文档对象
    private SAXReader saxReader;
    private Document document;

    public XmlUtils(String path) {
        //获取解析器
        saxReader = new SAXReader();
        try {
            //获取文档对象
            document = saxReader.read(path);
        } catch (DocumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public XmlUtils(InputStream path) {
        //获取解析器
        saxReader = new SAXReader();
        try {
            //获取文档对象
            document = saxReader.read(path);
        } catch (DocumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * 根据节点名称获取内容
     *
     * @param name 节点名称
     * @return 节点内容
     */
    public String getElementText(String name) {
        //定位根节点
        Element root = document.getRootElement();
        //根据名称定位节点
        Element msg = root.element(Codes.MSG.getMessage());
        if(msg==null){
            throw new RuntimeException("没有"+Codes.MSG.getMessage()+"节点");
        }
//        Element patInfo = msg.element(Codes.PAT_INFO.getMessage());
//        if(patInfo==null){
//            throw new RuntimeException("没有"+Codes.PAT_INFO.getMessage()+"节点");
//        }
        Element element = msg.element(name);
        if(element==null){
            return null;
        }
        //返回节点内容
        return element.getText();
    }

}