有Menu这个model如下
:
private MenuId id;
private String intranetNo;
public MenuId getId() {
return this.id;
} public void setId(MenuId id) {
this.id = id;
} public String getIntranetNo() {
return this.intranetNo;
} public void setIntranetNo(String intranetNo) {
this.intranetNo = intranetNo;
}
MenuId也是个实体类
private String sysNo;
private String progId;
public String getSysNo() {
return this.sysNo;
} public void setSysNo(String sysNo) {
this.sysNo = sysNo;
} public String getProgId() {
return this.progId;
} public void setProgId(String progId) {
this.progId = progId;
}
也是就是hibernate里,MenuId是复合主键
现在有一个List<Menu> menus ,如何生成xml文件,
并且读取xml文件返回List menus
:
private MenuId id;
private String intranetNo;
public MenuId getId() {
return this.id;
} public void setId(MenuId id) {
this.id = id;
} public String getIntranetNo() {
return this.intranetNo;
} public void setIntranetNo(String intranetNo) {
this.intranetNo = intranetNo;
}
MenuId也是个实体类
private String sysNo;
private String progId;
public String getSysNo() {
return this.sysNo;
} public void setSysNo(String sysNo) {
this.sysNo = sysNo;
} public String getProgId() {
return this.progId;
} public void setProgId(String progId) {
this.progId = progId;
}
也是就是hibernate里,MenuId是复合主键
现在有一个List<Menu> menus ,如何生成xml文件,
并且读取xml文件返回List menus
解决方案 »
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<?xml version="1.0" encoding="GB2312"?>
<RESULT>
<VALUE>
<NO>A1234</NO>
<ADDR>四川省XX县XX镇XX路X段XX号</ADDR>
</VALUE>
<VALUE>
<NO>B1234</NO>
<ADDR>四川省XX市XX乡XX村XX组</ADDR>
</VALUE>
</RESULT>
第一种 DOM 实现方法
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
public class MyXMLReader2DOM {
public static void main(String arge[]) {
long lasting = System.currentTimeMillis();
try {
File f = new File("data_10k.xml");
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(f);
NodeList nl = doc.getElementsByTagName("VALUE");
for (int i = 0; i < nl.getLength(); i++) {
System.out.print("车牌号码:"+ doc.getElementsByTagName("NO").item(i).getFirstChild().getNodeValue());
System.out.println("车主地址:"+ doc.getElementsByTagName("ADDR").item(i).getFirstChild().getNodeValue());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
第二种,DOM4J实现方法
import java.io.*;
import java.util.*;
import org.dom4j.*;
import org.dom4j.io.*;
public class MyXMLReader2DOM4J {
public static void main(String arge[]) {
long lasting = System.currentTimeMillis();
try {
File f = new File("data_10k.xml");
SAXReader reader = new SAXReader();
Document doc = reader.read(f);
Element root = doc.getRootElement();
Element foo;
for (Iterator i = root.elementIterator("VALUE"); i.hasNext();) {
foo = (Element) i.next();
System.out.print("车牌号码:" + foo.elementText("NO"));
System.out.println("车主地址:" + foo.elementText("ADDR"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
第三种 JDOM实现方法
import java.io.*;
import java.util.*;
import org.jdom.*;
import org.jdom.input.*;
public class MyXMLReader2JDOM {
public static void main(String arge[]) {
long lasting = System.currentTimeMillis();
try {
SAXBuilder builder = new SAXBuilder();
Document doc = builder.build(new File("data_10k.xml"));
Element foo = doc.getRootElement();
List allChildren = foo.getChildren();
for (int i = 0; i < allChildren.size(); i++) {
System.out.print("车牌号码:"+ ((Element) allChildren.get(i)).getChild("NO").getText());
System.out.println("车主地址:"+ ((Element) allChildren.get(i)).getChild("ADDR").getText());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
第四种SAX实现方法
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class MyXMLReader2SAX extends DefaultHandler {
java.util.Stack tags = new java.util.Stack();
public MyXMLReader2SAX() {
super();
}
public static void main(String args[]) {
long lasting = System.currentTimeMillis();
try {
SAXParserFactory sf = SAXParserFactory.newInstance();
SAXParser sp = sf.newSAXParser();
MyXMLReader2SAX reader = new MyXMLReader2SAX();
sp.parse(new InputSource("data_10k.xml"), reader);
} catch (Exception e) {
e.printStackTrace();
}
System.out.println("运行时间:" + (System.currentTimeMillis() - lasting)
+ "毫秒");
}
public void characters(char ch[], int start, int length)
throws SAXException {
String tag = (String) tags.peek();
if (tag.equals("NO")) {
System.out.print("车牌号码:" + new String(ch, start, length));
}
if (tag.equals("ADDR")) {
System.out.println("地址:" + new String(ch, start, length));
}
}
public void startElement(String uri, String localName, String qName,
Attributes attrs) {
tags.push(qName);
}
}
public String createXML() {
try {
// 生成根节点,并为根节点添加属性和属性值
Element root = (Element) DocumentHelper.createElement("根节点")
.addAttribute("id", "编号").addAttribute("name", "名称");
// 生成子节点,并为子节点添加属性和属性值
Element childElement = DocumentHelper.createElement("子节点")
.addAttribute("id", "子节点编号");
// 为节点添加值
childElement.addText("子节点值");
// 将子节点添加到根节点
root.add(childElement);
String filename = "jinchun.xml";
Document responseDoc = DocumentHelper.createDocument(root);
OutputFormat outputFormat = OutputFormat.createPrettyPrint();
outputFormat.setEncoding("GB2312");
XMLWriter xMLWriter = new XMLWriter(new FileWriter(filename),
outputFormat);
xMLWriter.write(responseDoc);
xMLWriter.close();
} catch (IOException e) { e.printStackTrace();
}
return "new ok!";
} /** * 解析XML */
public void parseXML() {
try {
SAXReader sAXReader = new SAXReader();
// 要解析的xml文件
File file = new File("jinchun2.xml");
Document document = sAXReader.read(file);
// 获取根节点
Element acreen = document.getRootElement();
// 打印根节点属性
System.out.println(acreen.attributeValue("id"));
System.out.println(acreen.attributeValue("name"));
// 获取子节点
List<Element> helloments = acreen.elements("子节点");
for (Element helloment : helloments) {
// 打印子节点属性
System.out.println(helloment.attributeValue("id"));
System.out.println(helloment.getText());
}
} catch (DocumentException e) { e.printStackTrace();
}
} public static void main(String args[]) {
Test test = new Test();
test.createXML();
test.parseXML();
}}
********************jinchun2.xml文件<?xml version="1.0" encoding="GB2312"?><根节点 id="编号" name="名称">
<子节点 id="子节点编号1">子节点值</子节点>
<子节点 id="子节点编号2">子节点值</子节点>
<子节点 id="子节点编号3">子节点值</子节点>
<子节点 id="子节点编号4">子节点值</子节点>
<子节点 id="子节点编号5">子节点值</子节点>
<子节点 id="子节点编号6">子节点值</子节点>
</根节点>
<menu>
<menuid>
<sysNo>value</sysNo>
<progId>value</progId>
</menuid>
<intranetNo>value</intranetNo>
</menu>你按照这样的格式去生成应该不难!
import java.io.FileOutputStream;
import java.io.IOException;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.output.XMLOutputter;
public class Java2XML {
public void BuildXMLDoc() throws IOException, JDOMException {
// 创建根节点 list;
Element root = new Element("list");
// 根节点添加到文档中;
Document Doc = new Document(root);
// 此处 for 循环可替换成 遍历 数据库表的结果集操作;
for (int i = 0; i < 5; i++) {
// 创建节点 user;
Element elements = new Element("user");
// 给 user 节点添加属性 id;
elements.setAttribute("id", "" + i);
// 给 user 节点添加子节点并赋值;
// new Element("name")中的 "name" 替换成表中相应字段,setText("xuehui")中 "xuehui 替换成表中记录值;
elements.addContent(new Element("name").setText("xuehui"));
elements.addContent(new Element("age").setText("28"));
elements.addContent(new Element("sex").setText("Male"));
// 给父节点list添加user子节点;
root.addContent(elements);
}
XMLOutputter XMLOut = new XMLOutputter();
// 输出 user.xml 文件;
XMLOut.output(Doc, new FileOutputStream("user.xml"));
}
public static void main(String[] args) {
try {
Java2XML j2x = new Java2XML();
System.out.println("生成 mxl 文件...");
j2x.BuildXMLDoc();
} catch (Exception e) {
e.printStackTrace();
}
}
}
生成的 user.xml 文件
<?xml version="1.0" encoding="UTF-8"?>
<list>
<user id="0">
<name>xuehui</name>
<age>28</age>
<sex>Male</sex>
</user>
<user id="1">
<name>xuehui</name>
<age>28</age>
<sex>Male</sex>
</user>
<user id="2">
<name>xuehui</name>
<age>28</age>
<sex>Male</sex>
</user>
<user id="3">
<name>xuehui</name>
<age>28</age>
<sex>Male</sex>
</user>
<user id="4">
<name>xuehui</name>
<age>28</age>
<sex>Male</sex>
</user>
</list>