Java針對XML檔案的操作大集合
XML是工作上常用到的資料交換格式,會需要利用JAVA進行XML資料的新增、修改或刪除,這裡把相關的方法記錄下來。
下述範例會存取在C:\Projects\Javas\中的sample.xml檔,而檔案中已經有以下的內容:
<?xml version="1.0" encoding="utf-8"?> <root> <item> <productID>10001</productID> <productName>產品名稱1</productName> <productPrice>10</productPrice> </item> <item> <productID>10002</productID> <productName>產品名稱2</productName> <productPrice>20</productPrice> </item> <item> <productID>10003</productID> <productName>產品名稱3</productName> <productPrice>30</productPrice> </item> </root>
利用Java存取XML我選用的Library是dom4j,可參考官網的介紹,以下是JAVA存取的程式範例:
package CDIT.stanley; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.util.Iterator; import org.dom4j.io.OutputFormat; import org.dom4j.io.XMLWriter; import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.Element; import org.dom4j.io.SAXReader; public class dom4jXMLFullSample { //新增XML Node內容 public static String XMLAppendNode(String xmlFilePath, String productID, String productName, String productPrice){ String appendStatus = "0"; try { SAXReader reader = new SAXReader(); Document document = reader.read(xmlFilePath); Element root = document.getRootElement(); Element item = root.addElement("item"); item.addElement("productID").setText(productID); item.addElement("productName").setText(productName); item.addElement("productPrice").setText(productPrice); OutputFormat format = OutputFormat.createPrettyPrint(); format.setEncoding("utf-8"); XMLWriter writer = new XMLWriter(new FileOutputStream(xmlFilePath),format); writer.write(document); writer.close(); appendStatus = "1"; } catch (DocumentException e) { return appendStatus; } catch (UnsupportedEncodingException e) { return appendStatus; } catch (FileNotFoundException e) { return appendStatus; } catch (IOException e) { return appendStatus; } return appendStatus; } //修改XML Node內容 public static String XMLChangeNodeValue(String xmlFilePath, String productID, String productName, String productPrice){ String updateStatus = "0"; try { SAXReader reader = new SAXReader(); Document document = reader.read(xmlFilePath); Element root = document.getRootElement(); @SuppressWarnings("rawtypes") Iterator it = root.elementIterator(); while (it.hasNext()) { Element element = (Element) it.next(); if(productID.equals(element.elementText("productID"))){ try { element.element("productName").setText(productName); element.element("productPrice").setText(productPrice); OutputFormat format = OutputFormat.createPrettyPrint(); format.setEncoding("utf-8"); XMLWriter writer = new XMLWriter(new FileOutputStream(xmlFilePath),format); writer.write(document); writer.close(); updateStatus = "1"; } catch (IOException e) { return updateStatus; } } } return updateStatus; } catch (DocumentException e) { return updateStatus; } } //刪除XML Node public static String XMLRemoveNode(String xmlFilePath , String productID){ String removeStatus = "0"; try { SAXReader reader = new SAXReader(); Document document = reader.read(xmlFilePath); Element root = document.getRootElement(); @SuppressWarnings("rawtypes") Iterator it = root.elementIterator(); while (it.hasNext()) { Element element = (Element) it.next(); if(productID.equals(element.elementText("productID"))){ try { element.element("item"); element.detach(); OutputFormat format = OutputFormat.createPrettyPrint(); format.setEncoding("utf-8"); XMLWriter writer = new XMLWriter(new FileOutputStream(xmlFilePath),format); writer.write(document); writer.close(); removeStatus = "1"; } catch (IOException e) { return removeStatus; } } } return removeStatus; } catch (DocumentException e) { return removeStatus; } } public static void main (String[] args){ String xmlFilePath = "C:\\Projects\\Javas\\sample.xml"; //新增 XMLAppendNode(xmlFilePath , "10004", "產品名稱4", "40"); //修改 XMLChangeNodeValue (xmlFilePath , "10001", "測試修改", "100"); //刪除 XMLRemoveNode (xmlFilePath , "10002"); } }
上述程式進行完後,會將原本的XML檔變成如下的內容:
<?xml version="1.0" encoding="utf-8"?> <root> <item> <productID>10001</productID> <productName>測試修改</productName> <productPrice>100</productPrice> </item> <item> <productID>10003</productID> <productName>產品名稱3</productName> <productPrice>30</productPrice> </item> <item> <productID>10004</productID> <productName>產品名稱4</productName> <productPrice>40</productPrice> </item> </root>
https://wakelet.com/wake/SrNOGPOPQQwL8uW17yVN1
e246d94438 karmfind
https://wakelet.com/wake/x_Euf-M-dMbGrW5iwDm2r
e246d94438 maizyoun
https://wakelet.com/wake/4BZL7NqpO1bvphXppg9x8
e246d94438 agrell
https://wakelet.com/wake/CMM4QztUl87ub0r6LUoGB
e246d94438 arrida
https://wakelet.com/wake/SgD0xpOh29hAQL5VxfgDp
e246d94438 okalmar
high on baclofen baclofen cheapest can you take tramadol with baclofen what is baclofen 10mg tablets
omeprazole and prednisone prednisone oral how often can i take prednisone how long does it take prednisone to start working
dragon slots
online slots bonus
win casino
https://weedseeds.garden/cbd-oil-in-oregon/
60292283da meynixs
https://weedseeds.garden/cbd-oil-in-kentucky/
60292283da engcle
ivermectin dosing chart ivermectin 12 mg where can i buy ivermectin how much ivermectin for chickens
casino machine gratuite
free classic slots games
777 casino
albuterol sulfate inhaler
propecia discount propecia merck effects of propecia on fertility what do doctors check for when perscribing propecia
simslots free slots slot machine
cleopatra slots free
free vegas penny slots