Java读写XML代码示例
采用技术：dom4j
需要jar包：dom4j-1.6.1.jar
主类如下----
public class dom4jTestXML {
/**
*
* 方法描述：读取XML文件示例 备 注: </br>
* 创 建 人: bo.gaobo</br>
* 修改日期: @2013-8-20</br>
*/
public static void readXML() {
SAXReader sr = new SAXReader();// 获取读取xml的对象。
try {
Document doc = sr.read("src/Noname1.xml");// 得到xml所在位置。然后开始读取。并将数据放入doc中
Element el_root = doc.getRootElement();// 向外取数据，获取xml的根节点。
System.out.println("根节点：" + el_root.getName());
Iterator it = el_root.elementIterator();// 从根节点下依次遍历，获取根节点下所有子节点
while (it.hasNext()) {// 遍历子节点
Object o = it.next();
Element el_row = (Element) o;
String str = el_row.getText();
Iterator it_row = el_row.elementIterator();
while (it_row.hasNext()) {
Element el_ename = (Element) it_row.next();
System.out.println(el_ename.getName() + "="
+ el_ename.getData());
}
}
} catch (DocumentException e) {
e.printStackTrace();
}
}
/**
*
* 方法描述：写入XML文件并存储 备 注: </br>
* 创 建 人: bo.gaobo</br>
* 修改日期: @2013-8-20</br>
*/
public static void writeToXML() {
Row row1 = new Row();
row1.setCo("co_1");
row1.setComm("comm_1");
row1.setDepno("depno_1");
row1.setEmpno("empno_1");
row1.setEname("ename_1");
row1.setMgr("mgr_1");
row1.setHiredate("2012-03-29");
row1.setJob("job_1");
row1.setSal("sal_1");
Document document = DocumentHelper.createDocument();
Element root = document.addElement("ROWDATA");
Element row = root.addElement("ROW");
row.addElement("CO").addText(row1.getCo());
row.addElement("EMPNO").addText(row1.getEmpno());
row.addElement("ENAME").addText(row1.getEname());
row.addElement("JOB").addText(row1.getJob());
row.addElement("MGR").addText(row1.getMgr());
row.addElement("HIREDATE").addText(row1.getHiredate());
row.addElement("SAL").addText(row1.getSal());
row.addElement("COMM").addText(row1.getComm());
row.addElement("DEPTNO").addText(row1.getDepno());
String filePath = "D:/xmlTest/" + getNowDay() + "/";
String fileName = "row1.xml";
String xmlStr = "";
xmlStr = document.asXML();
try {
Document dcmt = DocumentHelper.parseText(xmlStr);
saveDocumentToFile(dcmt, filePath, fileName, true, "UTF-8");
} catch (DocumentException e) {
e.printStackTrace();
}
}
public static String getNowDay() {
SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
return format.format(new Date());
}
/**
* 方法描述：<b>存储完整XML文件.</b></br>
* 备 注: </br>
* 创 建 人: zyl</br>
* 创建日期:2013-3-18</br>
*
* @param document
* @param xmlFilePath
* @param xmlFileName
* @param isTrimText
* @param xmlEncoding
*/
public static void saveDocumentToFile(Document document,
String xmlFilePath, String xmlFileName, boolean isTrimText,
String xmlEncoding) {
if (document == null || xmlFilePath == null || "".equals(xmlFileName)) {
return;
}
File file = new File(xmlFilePath);
// 判断路径是否存在，不存在创建
if (!file.exists()) {
file.mkdirs();
}
// 保存文件
OutputFormat format = null;
if (isTrimText) {
format = OutputFormat.createPrettyPrint();
} else {
format = DomXmlOutputFormat.createPrettyPrint();// 保留xml属性值中的回车换行
}
if (xmlEncoding != null) {
format.setEncoding(xmlEncoding);// GBK
} else {
format.setEncoding("UTF-8");// UTF-8
}
try {
org.dom4j.io.XMLWriter xmlWriter = new org.dom4j.io.XMLWriter(
new FileOutputStream(xmlFilePath + xmlFileName), format);// FileOutputStream可以使UTF-8生效
xmlWriter.write(document);
xmlWriter.close();
} catch (IOException e) {
System.out.println("保存XML异常：" + e.getMessage());
System.out.println("正在保存的文件名是：" + xmlFileName);
}
// 存到文件中结束
}
public static void main(String args[]) {
// readXML();
writeToXML();
}
}
class Row {
private String co;
private String empno;
private String ename;
private String job;
private String mgr;
private String hiredate;
private String sal;
private String comm;
private String depno;
public String getCo() {
return co;
}
public void setCo(String co) {
this.co = co;
}
public String getEmpno() {
return empno;
}
public void setEmpno(String empno) {
this.empno = empno;
}
public String getEname() {
return ename;
}
public void setEname(String ename) {
this.ename = ename;
}
public String getJob() {
return job;
}
public void setJob(String job) {
this.job = job;
}
public String getHiredate() {
return hiredate;
}
public void setHiredate(String hiredate) {
this.hiredate = hiredate;
}
public String getSal() {
return sal;
}
public void setSal(String sal) {
this.sal = sal;
}
public String getComm() {
return comm;
}
public void setComm(String comm) {
this.comm = comm;
}
public String getDepno() {
return depno;
}
public void setDepno(String depno) {
this.depno = depno;
}
public String getMgr() {
return mgr;
}
public void setMgr(String mgr) {
this.mgr = mgr;
}
}
主类结束----
辅助类，重写了createPrettyPrint()方法----
import org.dom4j.io.OutputFormat;
/**
* 类 描 述：<b>dom4j输出格式化.</b></br>
* 备 注: </br>
* 创 建 人: yanlei.zhao</br>
* 创建日期: 2011-12-1</br>
*/
public class DomXmlOutputFormat extends OutputFormat {
/**
* 方法描述：<b>dom4j输出格式化..</b></br>
* 备 注: 保存Document到xml文件时，xml属性中的回车换行需要保留，
* 可是发现在使用过程中发现dom4j自动把回车换行去掉了。特写此类</br>
* 创 建 人: yanlei.zhao</br>
* 创建日期: 2011-12-1</br>
* @return
*/
public static OutputFormat createPrettyPrint() {
OutputFormat format = new OutputFormat();
format.setIndentSize(2);
format.setNewlines(true);
format.setTrimText(false); // 覆盖 父类的 format.setTrimText(true);
format.setPadText(true);
return format;
}
}
辅助类结束----
示例XML文件----
<?xml version="1.0" ?>
<ROWDATA>
<ROW>
<C0>1</C0>
<EMPNO>7891</EMPNO>
<ENAME>sdffff</ENAME>
<JOB>job</JOB>
<MGR>mgr</MGR>
<HIREDATE>2010-1-1</HIREDATE>
<SAL>5000.00</SAL>
<COMM>1000.00</COMM>
<DEPTNO>deptno</DEPTNO>
</ROW>
<ROW>
<C0>2</C0>
<EMPNO>7369</EMPNO>
<ENAME>SMITH</ENAME>
<JOB>CLERK</JOB>
<MGR>7902</MGR>
<HIREDATE>1980-12-17</HIREDATE>
<SAL>800.00</SAL>
<COMM>comm</COMM>
<DEPTNO>20</DEPTNO>
</ROW>
</ROWDATA>
示例文件结束----
