XML小项目------dom4j操作联系人(图形界面版)
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内容图文
在进行此项目之前需要将dom4j的jar包及其依赖包导入，具体操作间本博客文章：XML之------dom4j对XML文档增删改查点击打开链接
公共类：DocumentFactory.java
package cn.hncu.contact.common;
import java.io.FileWriter;
import java.io.IOException;
import org.dom4j.Document;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
public class DocumentFactory {
private static Document dom=null;
static{
try {
SAXReader sax=new SAXReader();
dom=sax.read("xml/contact.xml");
} catch (Exception e) {
throw new RuntimeException("xml文件解析出错", e);
}
}
private DocumentFactory(){
}
public static Document getDocument(){
return dom;
}
public static void save(){
try {
XMLWriter writer=new XMLWriter(new FileWriter("xml/contact.xml"));
writer.write(dom);
writer.close();
} catch (IOException e) {
throw new RuntimeException("xml文件保存出错", e);
}
}
}
工具类：
IDGenerate.java
package cn.hncu.contact.utils;
import java.util.UUID;
public class IDGenerate {
private IDGenerate(){
}
public static String getId(){
String uuid=UUID.randomUUID().toString();
uuid=uuid.replace("-", "");
return uuid;
}
}PwdMd5Utils.java
package cn.hncu.contact.utils;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import sun.misc.BASE64Encoder;
public class PwdMd5Utils {
public static String mkPwd(String pwd){
String pwd2="";
try {
MessageDigest msg=MessageDigest.getInstance("MD5");
byte buf[]=msg.digest(pwd.getBytes());//buf的长度是16
for (byte b:buf){
String s=Integer.toHexString(b & 0xff);
if (s.length()==1){
s+="f";//可以把'f'换成其它的16进制数如'a'
}
pwd2+=s;
}
return pwd2;
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("加密失败", e);
}
}
public static void main(String[] args) {
//introduce1();
//introduce2();
md5_2();
}
//该加密方式目前可以用，但不建议，因为使用了oracle公司没有公开的类
private static void introduce1() {
String pwd="1234";
try {
MessageDigest msg=MessageDigest.getInstance("MD5");
byte buf[]=msg.digest(pwd.getBytes());
for (byte b:buf){
System.out.print(b+" ");
}
System.out.println();
System.out.println(buf.length);
//BASE64Encoder在API文档中不存在，即该类是oracle公司没有公开的，因此我们要谨用!!!
BASE64Encoder en=new BASE64Encoder();
String pwd2=en.encode(buf);
System.out.println("pwd2: "+pwd2);
} catch (Exception e) {
e.printStackTrace();
}
}
//该加密方式可用，我们自己写一段替代BASE64Encoder类中encode()方法的代码
private static void introduce2() {
String pwd="1234";
String pwd2="";
try {
MessageDigest msg=MessageDigest.getInstance("MD5");
byte buf[]=msg.digest(pwd.getBytes());
for (byte b:buf){
String s=Integer.toHexString(b & 0xff);
if (s.length()==1){
s+="f";
}
pwd2+=s;
}
System.out.println(pwd2);
System.out.println("len: "+pwd2.length());
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
}
private static void md5_2() {
String pwd="1234";
String pwd2="";
try {
MessageDigest msg=MessageDigest.getInstance("MD5");
byte buf[]=msg.digest(pwd.getBytes());
for (byte b:buf){
String s=Integer.toHexString(b & 0xff);
if (Math.abs(b)<16){
s="a"+s;
}
pwd2+=s;
}
System.out.println(pwd2);
System.out.println("len: "+pwd2.length());
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
}
}
表现层：ContactWin.java
package cn.hncu.contact.ui;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.DefaultTableModel;
import org.dom4j.Element;
import cn.hncu.contact.dao.ContactDAO;
import cn.hncu.contact.utils.IDGenerate;
public class ContactWin extends JFrame implements ActionListener{
private static Element currentUser=null;
private JTable jTable;
private DefaultTableModel dtm;
JTextField tfdName,tfdTel,tfdAddr,tfdSex;
JButton btnAdd,btnDel;
private ContactDAO dao=new ContactDAO();
public ContactWin(Element user){
this.currentUser=user;
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setBounds(200, 200, 500, 400);
this.setTitle("联系人管理界面");
Container c=this.getContentPane();
jTable=getTable();
c.add(new JScrollPane(jTable));
tfdName=new JTextField(5);
tfdAddr=new JTextField(5);
tfdSex=new JTextField(5);
tfdTel=new JTextField(5);
JPanel p=new JPanel();
p.add(new JLabel("联系人信息"));
p.add(tfdName);
p.add(tfdTel);
p.add(tfdSex);
p.add(tfdAddr);
btnAdd=new JButton("添加");
btnDel=new JButton("删除");
p.add(btnAdd);
p.add(btnDel);
c.add(p,BorderLayout.SOUTH);
btnAdd.addActionListener(this);
btnDel.addActionListener(this);
this.setVisible(true);
}
private JTable getTable() {
//表头
Vector<Object> vHeader=new Vector<Object>();
vHeader.add("id");
vHeader.add("name");
vHeader.add("telephone");
vHeader.add("sex");
vHeader.add("address");
Vector<Vector<Object>>datas=dao.getContacts(currentUser);
dtm=new DefaultTableModel(datas, vHeader);
JTable jt=new JTable(dtm);
//删除第一列，即不显示id
jt.removeColumn(jt.getColumn("id"));
return jt;
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource()==btnAdd){
//收集参数
String name=tfdName.getText();
String tel=tfdTel.getText();
String sex=tfdSex.getText();
String addr=tfdAddr.getText();
//补一个id
String id=IDGenerate.getId();
//保存到后台
boolean boo=dao.addContact(currentUser,id,name,tel,sex,addr);
//保存成功，刷新界面
if (boo){
Vector<Object> v=new Vector<Object>();
v.add(id);
v.add(name);
v.add(tel);
v.add(sex);
v.add(addr);
dtm.addRow(v);
} else {
JOptionPane.showMessageDialog(this, "添加联系人失败");
return;
}
} else if (e.getSource()==btnDel){
int row=jTable.getSelectedRow();
if (row==-1){
JOptionPane.showMessageDialog(null, "前选择要删除的行");
return;
}
String id=(String) dtm.getValueAt(row, 0);
boolean isSuccess=dao.delete(currentUser,id);
if (isSuccess){
dtm.removeRow(row);
} else {
JOptionPane.showMessageDialog(this, "删除联系人失败");
return;
}
}
}
}
数据层：ContactDAO.java
package cn.hncu.contact.dao;
import java.util.Iterator;
import java.util.Vector;
import org.dom4j.Document;
import org.dom4j.Element;
import cn.hncu.contact.common.DocumentFactory;
import cn.hncu.contact.utils.PwdMd5Utils;
public class ContactDAO {
private Document dom=DocumentFactory.getDocument();
//private static Element currentUser=null;
//登录
public Element login(String name, String pwd){
name=name.toLowerCase();
pwd=PwdMd5Utils.mkPwd(pwd);
String xpath="//user[fn:lower-case(@name)='"+name+"'][@pwd='"+pwd+"']";
Element e=(Element) dom.selectSingleNode(xpath);
//currentUser=e;
return e;
}
//查询所有联系人
public Vector<Vector<Object>> getContacts(Element currentUser) {
Vector<Vector<Object>> datas=new Vector<Vector<Object>>();
Iterator<Element> it=currentUser.elementIterator("contact");
while (it.hasNext()){
Element e=it.next();
Vector<Object> v=new Vector<Object>();
v.add(e.attributeValue("id"));
v.add(e.elementText("name"));
v.add(e.elementText("tel"));
v.add(e.elementText("sex"));
v.add(e.elementText("addr"));
datas.add(v);
}
return datas;
}
public boolean addContact(Element currentUser, String id, String name, String tel, String sex, String addr) {
Element e=currentUser.addElement("contact");
e.addAttribute("id", id);
e.addElement("name").setText(name);
e.addElement("tel").setText(tel);
e.addElement("sex").setText(sex);
e.addElement("addr").setText(addr);
try {
DocumentFactory.save();
return true;
} catch (Exception e1) {
return false;
}
}
public boolean delete(Element currentUser, String id) {
String xpath="//contact[@id='"+id+"']";
Element e=(Element) dom.selectSingleNode(xpath);
boolean boo=e.getParent().remove(e);
if (boo){
try {
DocumentFactory.save();
return true;
} catch (Exception e1) {
return false;
}
}
return false;
}
}登陆界面：LoginWin.java
package cn.hncu.contact;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import org.dom4j.Element;
import cn.hncu.contact.dao.ContactDAO;
import cn.hncu.contact.ui.ContactWin;
public class LoginWin extends JFrame {
private static Element currentUser=null;
public LoginWin(){
setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setBounds(200, 200, 400, 140);
JPanel p1=new JPanel(new GridLayout(2,2));
p1.add(new JLabel("用户名: "));
final JTextField tfdName=new JTextField(10);
p1.add(tfdName);
p1.add(new JLabel("用户名: "));
final JPasswordField jpfPwd=new JPasswordField(10);
p1.add(jpfPwd);
JPanel p2=new JPanel();
JButton btnLogin=new JButton("登录");
JButton btnCancel=new JButton("取消");
p2.add(btnLogin);
p2.add(btnCancel);
this.getContentPane().add(p1);
this.getContentPane().add(p2,BorderLayout.SOUTH);
btnLogin.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String name=tfdName.getText();
String pwd=new String(jpfPwd.getPassword());
if (name.trim().equals("")){
JOptionPane.showMessageDialog(LoginWin.this, "请输入用户名");
return;
}
Element user=new ContactDAO().login(name,pwd);
if (!(user==null)){
currentUser=user;
new ContactWin(currentUser);
LoginWin.this.setVisible(false);
} else {
JOptionPane.showConfirmDialog(LoginWin.this, "用户名或密码不正确");
return;
}
}
});
btnCancel.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
this.setVisible(true);
}
public static void main(String[] args) {
new LoginWin();
}
}
xml文档：
<?xml version="1.0" encoding="UTF-8"?>
<contacts>
<user name="Jack" pwd="81dc9bdb52d04dc20f36dbd8313ed055">
<contact id="a001">
<name>Tom</name>
<sex>Male</sex>
<tel>13812345678</tel>
<addr>湖南益阳</addr>
</contact>
<contact id="a002">
<name>Rose</name>
<sex>Female</sex>
<tel>13887654321</tel>
<addr>浙江杭州</addr>
</contact>
</user>
<user name="Tom" pwd="d93591bdf786ef1e4ee2fca799911215">
<contact id="b001">
<name>Jack</name>
<sex>Male</sex>
<tel>13800000000</tel>
<addr>浙江杭州</addr>
</contact>
<contact id="b002">
<name>Rose</name>
<sex>Female</sex>
<tel>13887654321</tel>
<addr>中国上海</addr>
</contact>
</user>
</contacts>原文：http://blog.csdn.net/x121850182/article/details/51902023
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