element.add(node)插入操作

import org.junit.Test;

import java.util.List;

/**
 * Created by dalei.qi on 2021/6/3.
 */
public class DocumentHelperUntil {
    
    @Test
    public void replace() throws DocumentException {
        String strtaeget = getxmlStrtaeget();
        String strRplace = getxmlStrRplace();
        Document targe = DocumentHelper.parseText(strtaeget);
        Document replace = DocumentHelper.parseText(strRplace);

        Element rootElement = replace.getRootElement();
        //栓除/Application/RosterList的RosterList节点
        Element rosterList = rootElement.element("RosterList").element("GreyList");

        //获取根节点
        Element targeRootElement = targe.getRootElement();
        //得到Element的内容
        List content = targeRootElement.content();
        //添加节点content.add(rosterList);
        //制动位置
        content.add(0,rosterList);
        //加载数据到原始节点
        targeRootElement.setContent(content);

        System.out.println("after = "+ targe.asXML());
    }

    public String getxmlStrtaeget() {
        return "\t<Application >  \n" +
                "\t\t<RosterList>\n" +
                "\t\t<BlackList bLackStrategyID=\"-9981\" blackListLevel=\"-9981\" blackListLevelJXH=\"-9981\" blackListScoreJXH=\"-9981\" blackListSourceChannel=\"-9981\" blackListType=\"-9981\" blackReasonMsg=\"-9981\" blackSourceType=\"-9981\" isBlackCustomer=\"false\"/>\n" +
                "\t\t<GreyList greyReasonMsg=\"-9999\" greyStrategyID=\"-9999\" isGreyCustomer=\"-9999\"/>\n" +
                "\t</RosterList>\n" +
                "\t\n" +
                "\t</Application>";
    }
    public String getxmlStrRplace() {
        return "<Application>  \n" +
                "\t\t<RosterList>\n" +
                "\t\t<GreyList greyReasonMsg=\"-9999\" greyStrategyID=\"-9999\" isGreyCustomer=\"-9999\"/>\n" +
                "\t</RosterList>\n" +
                "\t\n" +
                "\t</Application>";
    
    }
}