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SSM框架实现xml导出并在客户端下载的三种方式(本文原创,转载请标明转载地址，谢谢~)

1.使用Document创建节点

// 创建xml
Document document = DocumentHelper.createDocument();

//创建节点

Element elements = document.addElement("ImportMessage").addNamespace("xsi","http://www.w3.org/2001/XMLSchema-instance").addAttribute("xsi:noNamespaceSchemaLocation","SWImportMessagexsd.xsd");

注:第一个是创建根节点，addNamespace()定义命名空间，后面一个就是自定义属性，如下图所示：

//创建子节点

-----创建第一个子节点

Element ele = elements.addElement("Head");　

Element nameEle = ele.addElement("CopMsgId").addText("普通报关单.xml");
nameEle = ele.addElement("MsgType").addText("SWDEC001");
nameEle = ele.addElement("FunctionCode").addText("0");
　　　　　nameEle = ele.addElement("Format").addText("xml");
nameEle = ele.addElement("Compress").addText("0");
nameEle = ele.addElement("Version").addText("1.0");

如图所示：

-----------创建第二个子节点

Element ele2 = elements.addElement("Data");

--------创建第二个子节点的子节点

Element nameEle2 = ele2.addElement("DecMessage");

-------创建子节点的子节点

Element nameEle3 = nameEle2.addElement("DecLists");
nameEle3 = nameEle2.addElement("DecContainers");
nameEle3 = nameEle2.addElement("DecLicenseDocus");

//获取所有的节点名称

Element root = document.getRootElement();

------------创建子节点下的节点循环，例如DecLists

for (CustomsDeclareBillDetail detail:detailList) {

//找到要创造节点循环的子节点名称:root.selectSingleNode()
Element ee2 = (Element) root.selectSingleNode("//DecLists");

//创建节点循环的节点名称

Element ele6 = ee2.addElement("DecList");

 Element ele7=ele7=ele6.addElement("商品编号").addText(XMLUtil.replaceNullString(detail.getCodeT()));
         ele7=ele6.addElement("备案序号").addText(XMLUtil.replaceNullString(detail.getRelmanNo()));
         ele7=ele6.addElement("商品名称").addText(XMLUtil.replaceNullString(detail.getGName()));
         ele7=ele6.addElement("规格型号").addText(XMLUtil.replaceNullString(detail.getgModel()));
         ele7= ele6.addElement("成交数量").addText(XMLUtil.replaceNullString(detail.getgQty()==null?"":detail.getgQty().toString()));
         ele7= ele6.addElement("成交单位").addText(XMLUtil.replaceNullString(detail.getGUnit()));
         ele7= ele6.addElement("法定单位").addText(XMLUtil.replaceNullString(detail.getLegalUnits()));
         ele7= ele6.addElement("成交总价").addText(XMLUtil.replaceNullString(detail.getDeclTotal()==null?"":detail.getDeclTotal().toString()));
         ele7= ele6.addElement("币制").addText(XMLUtil.replaceNullString(detail.getDeclCurr()));
         ele7= ele6.addElement("原产国").addText(XMLUtil.replaceNullString(detail.getOriginCountry()));
         ele7= ele6.addElement("征减免税方式").addText(XMLUtil.replaceNullString(detail.getDutyMode()));
         ele7= ele6.addElement("最终目的国").addText(XMLUtil.replaceNullString(detail.getDestCountry()));
         ele7= ele6.addElement("提运单号").addText(XMLUtil.replaceNullString(detail.getBillNo()));
}

String xmlString = document.asXML();

String xmlDoc = XMLUtil.formatXml(xmlString);
String fileName = "报关单.xml";

XMLUtil.getXMLWriter(response, fileName,xmlDoc);

如下图所示:

2.使用StringBuffer拼接xml文件：

System.getProperty("line.separator");//为换行标记

StringBuffer buffer = new StringBuffer();

buffer.append("<?xml version="1.0" encoding="UTF-8"?>"+System.getProperty("line.separator"));
buffer.append("<ImportMessage xsi:noNamespaceSchemaLocation="SWImportMessagexsd.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">"+System.getProperty("line.separator"));

buffer.append("<Head>"+System.getProperty("line.separator"));
buffer.append("<CopMsgId>普通报关单.xml</CopMsgId>"+System.getProperty("line.separator"));
buffer.append("<MsgType>SWDEC001</MsgType>"+System.getProperty("line.separator"));
buffer.append("<FunctionCode>0</FunctionCode>"+System.getProperty("line.separator"));
buffer.append("<Format>xml</Format>"+System.getProperty("line.separator"));
buffer.append("<Compress>0</Compress>"+System.getProperty("line.separator"));
buffer.append("<Version>1.0</Version>"+System.getProperty("line.separator"));
buffer.append("</Head>"+System.getProperty("line.separator"));

buffer.append("<Data>"+System.getProperty("line.separator"));
buffer.append("<DecMessage>"+System.getProperty("line.separator"));
buffer.append("<DecLists>"+System.getProperty("line.separator"));

for (CustomsDeclareBillDetail detail:detailList) {
               buffer.append("<DecList>"+System.getProperty("line.separator"));
               buffer.append("<商品编号>"+detail.getCodeT()+"</商品编号>"+System.getProperty("line.separator"));
               buffer.append("<备案序号>"+detail.getRelmanNo()+"</备案序号>"+System.getProperty("line.separator"));
               buffer.append("<商品名称>"+detail.getGName()+"</商品名称>"+System.getProperty("line.separator"));
               buffer.append("<规格型号>"+detail.getgModel()+"</规格型号>"+System.getProperty("line.separator"));
               buffer.append("<成交数量>"+XMLUtil.replaceNullString(detail.getgQty()==null?"":detail.getgQty().toString())+"</成交数量>"+System.getProperty("line.separator"));
               buffer.append("<成交单位>"+detail.getGUnit()+"</成交单位>"+System.getProperty("line.separator"));
               buffer.append("<法定单位>"+detail.getLegalUnits()+"</法定单位>"+System.getProperty("line.separator"));
               buffer.append("<成交总价>"+XMLUtil.replaceNullString(detail.getDeclTotal()==null?"":detail.getDeclTotal().toString())+"</成交总价>"+System.getProperty("line.separator"));
               buffer.append("<币制>"+detail.getDeclCurr()+"</币制>"+System.getProperty("line.separator"));
               buffer.append("<原产国>"+detail.getOriginCountry()+"</原产国>"+System.getProperty("line.separator"));
               buffer.append("<征减免税方式>"+detail.getDutyMode()+"</征减免税方式>"+System.getProperty("line.separator"));
               buffer.append("<最终目的国>"+detail.getDestCountry()+"</最终目的国>"+System.getProperty("line.separator"));
               buffer.append("<提运单号>"+detail.getBillNo()+"</提运单号>"+System.getProperty("line.separator"));
               buffer.append("</DecList>"+System.getProperty("line.separator"));
}
               buffer.append("</DecLists>"+System.getProperty("line.separator"));
               buffer.append("</DecMessage>"+System.getProperty("line.separator"));
               buffer.append("</Data>"+System.getProperty("line.separator"));

buffer.append("</ImportMessage>");

String xmlString = buffer.toString();
String xmlDoc = XMLUtil.formatXml(xmlString);
String fileName = "报关单.xml";

XMLUtil.getXMLWriter(response, fileName,xmlDoc);

3.使用String += 输出xml文件:

string strXML = "<?xml version="1.0"?>";
          strXML+="<books><bookdata id="1">";
            
          strXML+="<title>C# premier</title>";
          strXML += "<year>2005</year>";
          strXML+="<publisher> Qinghua University Press</publisher>";
          strXML+="<Author>hou </Author>";
          strXML+="<pagers>500 </pagers>";
          strXML+="<description> c# fundation knowledge</description>";
          strXML+="<Price>50.00</Price>";
          strXML+="</bookdata>";

          strXML+="<bookdata id="2">";
          strXML+="<title>xml premier</title>";
          strXML+="<year>2005</year>";
          strXML+="<publisher> Peking University Press</publisher>";
          strXML+="<Author>Leo </Author>";
          strXML+="<pagers>400 </pagers>";
          strXML+="<description> xml fundation knowledge</description>";
          strXML+="<Price>45.00</Price>";
          strXML+="</bookdata>";

     strXML+="<bookdata id="3">";
     strXML+="<title>UML</title>";
     strXML+="<year>2005</year>";
     strXML+="<publisher> Peking University Press</publisher>";
     strXML+=" <Author>James </Author>";
     strXML+=" <pagers>650 </pagers>";
     strXML+=" <description>UML fundation knowledge</description>";
     strXML += " <Price>85.00</Price>";
     strXML+=" </bookdata></books>";

Response.ContentType = "text/xml";
            Response.Charset = "UTF-8";
            System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
            doc.LoadXml(strXML);
            doc.Save(Response.OutputStream);
            Response.End();

或:

String xmlDoc = XMLUtil.formatXml(strXML);
String fileName = "报关单.xml";

XMLUtil.getXMLWriter(response, fileName,xmlDoc);

最后附上调用的工具包:

public class XMLUtil {
    private final static org.slf4j.Logger logger = LoggerFactory.getLogger(XMLUtil.class);  
      
    private XMLUtil() {  
    }  
  
    /** 
     * 根据字符串创建 document 对象 
     * 
     * @param xmlStr 
     * @return 
     */  
    public static Document getDocumentByString(String xmlStr) {  
        Document doc = null;  
        try {  
            doc = DocumentHelper.parseText(xmlStr);  
        } catch (DocumentException e) {  
            logger.error("字符串转换成XML失败:" + e.getMessage());  
        }  
        return doc;  
    }  
  
    /** 
     * 设置response的返回信息 
     * @param response 
     * @param fileName 
     * @return    XMLWriter 
     */  
    public static XMLWriter getXMLWriter(HttpServletResponse response,String fileName,String xmlDoc) {  
        XMLWriter writer = null;  
        OutputStream os = null;  
        try {  
            //定义xml文件的格式  
            OutputFormat format = OutputFormat.createPrettyPrint();  
            format.setEncoding("UTF-8");  
            //准备输出xml文件  
            writer =new XMLWriter(response.getOutputStream(),format);  
            response.setContentType("text/xml;charset=UTF-8");  
            response.setHeader("Content-disposition", "attachment;filename=" + new String(fileName.getBytes(), "iso-8859-1")); 
            os = response.getOutputStream();  
            os.write(xmlDoc.getBytes("UTF-8"));
            writer.setOutputStream(os);
        }catch (Exception e){  
            logger.error("导出xml时获取XMLWriter出错："+e);  
        }finally {  
            if(null != os){  
                try {  
                    os.close();  
                } catch (IOException e) {  
                    logger.error("关闭outputStream出错："+e);  
                }  
            }  
        }  
        return writer;  
    }  
    
    public static String formatXml(String xml) throws DocumentException, IOException{   
     SAXReader saxReader = new SAXReader(); 
     
     Document document = saxReader.read(new ByteArrayInputStream(xml.getBytes()));   
     //创建输出格式
     OutputFormat format = OutputFormat.createPrettyPrint();  
     //制定输出xml的编码类型
     format.setEncoding("UTF-8");
     
     StringWriter writer = new StringWriter();
     //创建一个文件输出流
     XMLWriter xmlwriter = new XMLWriter(writer, format);
     //将格式化后的xml串写入到文件
     xmlwriter.write(document); 
      String returnValue = writer.toString();
     writer.close();  
            
      //返回编译后的字符串格式
     return returnValue;
    }
  
    /** 
     * 根据file获得Document 
     * @param file   MultipartFile 
     * @return       Document 
     */  
    public static Document getDocumentByFile(MultipartFile file){  
        File file1 = new File(file.getOriginalFilename());  
        Document document = null;  
        try {  
            file.transferTo(file1);  
            //创建SAXReader对象  
            SAXReader reader = new SAXReader();  
            //读取文件 转换成Document  
            document = reader.read(file1);  
        } catch (IOException e) {  
            document = null;  
            logger.error("文件转换出错："+e);  
        } catch (DocumentException e) {  
            document = null;  
            logger.error("读取文件出错："+e);  
        }  
        return document;  
    }  
    
    
    
    public static void main(String[] args){
        //创建xml
                Document document = DocumentHelper.createDocument();  
                //创建节点
                Element elements = document.addElement("list");
                
                for (int i = 0; i < 1; i++) {
                    Element ele = elements.addElement("CustomsDeclareBill");
                    ele.addAttribute("id", "6");
                    
                    Element nameEle = ele.addElement("提运单号");
                    nameEle.setText("55555");
                    
                    OutputFormat format = OutputFormat.createPrettyPrint();//Format格式！！  
                    format.setEncoding("UTF-8");
                     XMLWriter writer = null;
                    try {
                        writer = new XMLWriter(format);
                    } catch (UnsupportedEncodingException e1) {
                        // TODO Auto-generated catch block
                        e1.printStackTrace();
                    }  
                     try {  
                         //讲xml文档输出到控制台上  
                        writer.write(document);  
                    } catch (IOException e) {  
                          
                        e.printStackTrace();  
                    }  
                }
    }
    
    
    public static String replaceNullString(String str){  
        if(str == null ){
            return "";  
        }else if(str.equals("")){
            return "";
        }else{
            return str;  
        } 
    }  
}

View Code

最后导出个xml文件如图所示:

以上三种方法都是本人亲测并实现的功能，有什么问题欢迎留言询问~如果觉得此文对你有帮助的话，顶一下文哦~

部分代码参考自http://www.cnblogs.com/zgqys1980/archive/2009/10/17/1585052.html

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原文地址：https://www.cnblogs.com/jbml-154312/p/7794148.html