javaxml寫入

⑴ java怎麼讀寫xml文件

public List<Student> doReadXML(String path) throws Exception {
List<Student> empvoList = new ArrayList<Student>();

File file = new File(path);
//輸入流對象
FileInputStream fis = new FileInputStream(file);
//jdom解析器
SAXBuilder sb = new SAXBuilder();
Document doc= sb.build(fis);
//獲得XML的根元素
Element root = doc.getRootElement();
//獲得根元素下的所有子元素
List<Element> employees = root.getChildren();
for(int i=0;i<employees.size();i++){
Element employee =employees.get(i);
Student stu= new Student();
String name = employee.getChildText("name");
String sex = employee.getChildText("sex");
String agetemp = employee.getChildText("age");
String home = employee.getChildText("home");
String email = employee.getChildText("email");

stu.setName(name);
stu.setSex(sex);
int age = 0;
if(agetemp.equals("")){
age = 0;
} else {
age = Integer.parseInt(agetemp);
}
stu.setAge(age);
stu.setHome(home);
stu.setEmail(email);
System.out.println(name+"\t"+i);
empvoList.add(stu);
}
return empvoList;
}

⑵ java xml如何寫

這個是要求命令行程序吧
首先是選擇一個xml庫，然後是實現基本的集合查詢，最後是實現輸入輸出

⑶ java如何向xml文件寫入內容

解析(也就是讀取)的話，可以採用SAX解析，或者DOM4J (dom for java)解析，寫入的話，可以採用dom寫入，SAX和DOM4J都是Apache的開源項目，你可以從官網上搜到相關的Jar包，導入的Eclipse即可使用，至於代碼示例的話，網路谷歌一下，栗子很多，希望能幫到你。

⑷ JAVA如何寫XML文件

import java.io.*;

import org.dom4j.*;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

public class DOM4JTest {
public static void main(String[] args) {
Document doc = DocumentHelper.createDocument();
doc.addProcessingInstruction("xml-stylesheet", "type='text/xsl href='students.xsl'");
Element root = doc.addElement("students");

Element eltStu1 = root.addElement("student").addAttribute("sn", "01");
Element eltName1 = eltStu1.addElement("name");
Element eltAge1 = eltStu1.addElement("age");
eltName1.setText("張三");
eltAge1.setText("20");

Element eltStu2 = root.addElement("student").addAttribute("sn", "02");
Element eltName2 = eltStu2.addElement("name");
Element eltAge2 = eltStu2.addElement("age");
eltName2.setText("李四");
eltAge2.setText("18");

try {
OutputFormat format = new OutputFormat("
", true);
format.setEncoding("gb2312");
// 可以把System.out改為你要的流。
XMLWriter xmlWriter = new XMLWriter(new PrintWriter(System.out), format);
xmlWriter.write(doc);
xmlWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

⑸ java如何將一段xml的字元串文件寫入到xml文件 然後再解析出來

用dom4j，獲取指定的位元組 List rootList = root.selectNodes("RETURN_CD"); rootList.get(0);
獲取的就是成功了哦

⑹ JAVA如何寫XML文件

呵呵，你這個問題，其實寫XML很簡單的，氛圍以下幾步：
1.導入DOM4J包，在此我使用dom4j來做。
2.創建dom4j的實例：Document document = DocumentHelper.createDocument();
3.一級一級的添加節點或者屬性，這個具體參照dom4j幫助：
Element rootGen = document.addElement("root");
4.定義以下3個對象，然後進行操作：
Writer writer = null;
OutputFormat format = null;
XMLWriter xmlwriter = null;

***********************************************************************************
附上代碼：
public void CreateXMl(StudentBean sn){
//創建document對象
Document document = DocumentHelper.createDocument();
//定義根節點Element
Element rootGen = document.addElement("root");
//定義根節點ROOT的子節點們
Element nameGen = rootGen.addElement("Name");
nameGen.addAttribute("name", "我是中文");
Element ageGen = rootGen.addElement("Age");
Element addrGen = rootGen.addElement("Address");
Writer writer = null;
OutputFormat format = null;
XMLWriter xmlwriter = null;
//將定義好的內容寫入xml文件中
try {
//使用這個writer也可以，只不過遇到中文會亂碼哦
// writer = new FileWriter("d:/test.xml");
//進行格式化
format = OutputFormat.createPrettyPrint();
//設定編碼
format.setEncoding("UTF-8");
xmlwriter = new XMLWriter(new FileOutputStream("d:/test.xml"), format);
xmlwriter.write(document);
xmlwriter.flush();
xmlwriter.close();
System.out.println("-----------Xmlfile successfully created-------------");
} catch (Exception e) {
e.printStackTrace();
System.out.println("-----------Exception occured ring of create xmlfile -------");
}
}

⑺ java中如何寫xml

您好，提問者：
String xml = 「<?xml version=\"1.0\" encoding=\"GBK\"?><父節點><子節點></子節點></父節點>」;
一般是介面傳輸數據用的。

⑻ 如何用Java實現對xml文件的讀取和寫入以及保存

直接附源碼import java.io.FileWriter;
import java.io.IOException;
import java.util.Iterator;import org.dom4j.*;
import org.dom4j.io.XMLWriter;
public class Dom4jSample { public static void main(String[] args) {
Dom4jSample dom4jSample = new Dom4jSample();
Document document = dom4jSample.createDocument();
try{
dom4jSample.FileWrite(document);

Document documentStr = dom4jSample.StringToXML("<China>I Love!</China>");
dom4jSample.XMLWrite(documentStr);

Element legend = dom4jSample.FindElement(document);
System.out.println(legend.getText());
}
catch(Exception e)
{

}
}

/*
* Create a XML Document
*/
public Document createDocument()
{
Document document = DocumentHelper.createDocument();

Element root = document.addElement("root");

Element author1 = root.addElement("Lynch");
author1.addAttribute("Age","25");
author1.addAttribute("Country","China");
author1.addText("I am great!");

Element author2 = root.addElement("Legend");
author2.addAttribute("Age","25");
author2.addAttribute("Country","China");
author2.addText("I am great!too!");

return document;
}

/*
* Create a XML document through String
*/
public Document StringToXML(String str) throws DocumentException
{
Document document = DocumentHelper.parseText(str);
return document;
}
public Element FindElement(Document document)
{
Element root = document.getRootElement();
Element legend = null;
for(Iterator i=root.elementIterator("legend");i.hasNext();)
{
legend = (Element)i.next();
}
return legend;
}

/*
* Write a XML file
*/
public void FileWrite(Document document) throws IOException
{
FileWriter out = new FileWriter("C:/Dom2jSample.xml");
document.write(out);
out.close();
}

/*
* Write a XML format file
*/
public void XMLWrite(Document document) throws IOException
{
XMLWriter writer = new XMLWriter(new FileWriter("C:/Dom2jSampleStr.xml"));
writer.write(document);
writer.close();
}
}