java联系人管理系统简单设计
本文实例为大家分享了java联系人管理系统毕业设计,供大家参考,具体内容如下
要求:
请使用XML保存数据,完成一个联系人管理系统。
用户必须经过认证登录后方可以使用系统。
注册、增加、删除、查看联系人功能。
分模块进行设计。
两层框架-用户交互层,Dao层。
其他支持层-数据封装层。
工具类-加密,工厂Bean。
开发步骤:
第一步:设计数据结构-XML。
第一步:设计数据结构-XML。
第三步:准备资源并编码实现。
第四步:运行测试。
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<? xml version = "1.0" encoding = "UTF-8" standalone = "no" ?>< contacts >
< user name = "Jack" pwd = "1234" >
< contact id = "707dede609dd4a2990f7cfa4cd5233f9" >
< name >xiaoming</ name >
< sex >male</ sex >
< tel >123456</ tel ></ contact >
< contact id = "80983802eaa6402d8bac8bb39e71c48f" >
< name >12</ name >
< sex >12</ sex >
< tel >12</ tel >
</ contact ></ user >
< user name = "Rose" pwd = "4321" >
< contact id = "eedb795b97194c3aaa9bacda7e2948e9" >
< name >xiaoming</ name >
< sex >female</ sex >
< tel >123</ tel >
</ contact ></ user >
</ contacts >
|
util
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package cn.hncu.contact.util;
import java.util.UUID;
public class IDGenerate {
private IDGenerate(){
}
public static String getID(){
// return UUID.randomUUID().toString(); return UUID.randomUUID().toString().replace( "-" , "" );
}
} |
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package cn.hncu.contact.util;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
public class myDocumentFactory {
private static final String FILE_NAME= "./xml/users.xml" ;
private static Document dom= null ;
static {
DocumentBuilder db;
try {
db=DocumentBuilderFactory.newInstance().newDocumentBuilder();
dom=db.parse(FILE_NAME);
} catch (Exception e) {
throw new RuntimeException( "xml文档解析失败..." ,e);
}
}
public static Document getDocument(){
return dom;
}
public static void save(){
try {
Transformer tf=TransformerFactory.newInstance().newTransformer();
tf.transform( new DOMSource(dom), new StreamResult(FILE_NAME));
} catch (Exception e) {
throw new RuntimeException( "xml文档存储失败..." , e);
}
// ConfigurationError:配置异常 }
} |
dao
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package cn.hncu.contact.dao;
import java.util.List;
import java.util.Map;
import org.w3c.dom.Element;
public interface contactDAO {
public abstract boolean login(String name,String pwd);
public abstract List<Map<String, String>> queryAll();
public abstract Element add(String name,String sex,String tel);
public abstract void reg(String name,String pwd);
public Element delete(String id); //默认abstract
public abstract Element change(String id, String name, String sex,
String tel);
} |
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package cn.hncu.contact.dao;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import cn.hncu.contact.util.IDGenerate;
import cn.hncu.contact.util.myDocumentFactory;
public class contactImpl implements contactDAO{
private Element currentUser;
Document dom= null ;
public contactImpl(){
}
// private static String name=null; // private static String pwd=null; @Override
// public boolean login(String name2, String pwd2) { public boolean login(String name, String pwd) {
// name=name2; // pwd=pwd2; dom=myDocumentFactory.getDocument();
Element root=(Element) dom.getFirstChild();
NodeList nodelist=root.getElementsByTagName( "user" );
for ( int i= 0 ;i<nodelist.getLength();i++){
Element e=(Element) nodelist.item(i);
if (e.getAttribute( "name" ).equalsIgnoreCase(name)&&e.getAttribute( "pwd" ).equalsIgnoreCase(pwd)){
currentUser=e;
return true ;
}
}
return false ;
}
@Override
public List<Map<String, String>> queryAll() {
List<Map<String, String>> list= new ArrayList<Map<String,String>>();
if (currentUser== null ){
return list ;
}
NodeList nodeList=currentUser.getElementsByTagName( "contact" );
for ( int i= 0 ;i<nodeList.getLength();i++){
Map<String, String> map= new HashMap<String, String>();
Element e=(Element) nodeList.item(i);
String id=e.getAttribute( "id" );
map.put( "id" , id);
String name=e.getElementsByTagName( "name" ).item( 0 ).getTextContent();
map.put( "name" , name);
String sex=e.getElementsByTagName( "sex" ).item( 0 ).getTextContent();
map.put( "sex" , sex);
String tel=e.getElementsByTagName( "tel" ).item( 0 ).getTextContent();
map.put( "tel" , tel);
list.add(map);
}
return list;
}
@Override
public Element add(String name,String sex,String tel) {
Document dom=myDocumentFactory.getDocument();
Element eNewContact=dom.createElement( "contact" );
eNewContact.setAttribute( "id" , IDGenerate.getID());
Element nameNew=dom.createElement( "name" );
nameNew.setTextContent(name);
eNewContact.appendChild(nameNew);
Element sexNew=dom.createElement( "sex" );
sexNew.setTextContent(sex);
eNewContact.appendChild(sexNew);
Element telNew=dom.createElement( "tel" );
telNew.setTextContent(tel);
eNewContact.appendChild(telNew);
currentUser.appendChild(eNewContact);
myDocumentFactory.save();
// login(name, pwd); return eNewContact;
}
public Element delete(String id) {
NodeList nodeList=currentUser.getElementsByTagName( "contact" );
for ( int i= 0 ;i<nodeList.getLength();i++){
Element e=(Element) nodeList.item(i);
if (e.getAttribute( "id" ).equals(id)){
currentUser.removeChild(e); //把节点从树中移除
myDocumentFactory.save();
// login(name, pwd); return e;
}
}
return null ;
}
@Override
public void reg(String name, String pwd) {
Document dom=myDocumentFactory.getDocument();
Element userNew=dom.createElement( "user" );
userNew.setAttribute( "name" , name);
userNew.setAttribute( "pwd" , pwd);
dom.getFirstChild().appendChild(userNew);
myDocumentFactory.save();
}
@Override
public Element change(String id, String name, String sex, String tel) {
NodeList nodeList=currentUser.getElementsByTagName( "contact" );
for ( int i= 0 ;i<nodeList.getLength();i++){
Element e=(Element) nodeList.item(i);
if (e.getAttribute( "id" ).equals(id)){
e.getElementsByTagName( "name" ).item( 0 ).setTextContent(name);
e.getElementsByTagName( "sex" ).item( 0 ).setTextContent(sex);
e.getElementsByTagName( "tel" ).item( 0 ).setTextContent(tel);
myDocumentFactory.save();
// login(name, pwd); return e;
}
}
return null ;
}
} |
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package cn.hncu.contact.dao;
public class contactDAOFactory {
private contactDAOFactory(){
}
public static contactDAO getContactDAO(){
return new contactImpl();
}
} |
cmd
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package cn.hncu.contact.cmd;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import org.w3c.dom.Element;
import cn.hncu.contact.dao.contactDAO;
import cn.hncu.contact.dao.contactDAOFactory;
public class contanctAction {
private contactDAO dao=contactDAOFactory.getContactDAO();
private Scanner sc= null ;
private String delIds[];
public contanctAction(){
sc= new Scanner(System.in);
while ( true ) {
System.out.println( "1:登录" );
System.out.println( "2:注册" );
System.out.println( "0:退出" );
String op=sc.nextLine();
if ( "1" .equals(op)) {
Login();
} else if ( "2" .equals(op)) {
Reg();
} else {
// System.exit(0); break ;
}
}
}
private void Reg() {
System.out.println( "请输入用户名:" );
String name=sc.nextLine();
System.out.println( "请输入用户密码:" );
String pwd=sc.nextLine();
System.out.println( "请确认用户密码:" );
String pwd2=sc.nextLine();
if (pwd.equals(pwd2)){
dao.reg(name,pwd);
} else {
System.out.println( "两次密码输入不一致,请重新注册" );
}
}
private void Login() {
System.out.println( "请输入用户名:" );
String name=sc.nextLine();
System.out.println( "请输入用户密码:" );
String pwd=sc.nextLine();
boolean boo=dao.login(name, pwd);
if (boo){
System.out.println( "登录成功..." );
operation();
} else {
System.out.println( "denglushibai" );
}
}
private void operation() {
List<Map<String, String>> list = dao.queryAll();
delIds= new String[list.size()];
int i= 0 ;
for (Map<String, String> map : list) {
String id=map.get( "id" );
delIds[i++]=id;
}
// while (true) { //因为共用同一棵dom树,所以每次增删改查之后,还是原来那棵dom树.
//而while内的操作都是对之前的操作,所以要退出到上一阶段重新登陆,获取更新之后的dom树
System.out.println( "1:显示联系人" );
System.out.println( "2:添加联系人" );
System.out.println( "3:删除联系人" );
System.out.println( "4:修改联系人" );
System.out.println( "0:退出" );
String sel = sc.nextLine();
if ( "1" .equals(sel)) {
System.out.println( "序号\t姓名\t性别\t电话" );
System.out.println( "------------------------------" );
int j = 1 ;
for (Map<String, String> map : list) {
String name = map.get( "name" );
String sex = map.get( "sex" );
String tel = map.get( "tel" );
System.out.println((j++) + "\t" + name + "\t" + sex + "\t"
+ tel);
}
} else if ( "2" .equals(sel)) {
addContact();
} else if ( "3" .equals(sel)) {
delContact();
} else if ( "4" .equals(sel)) {
changeContact();
} else if ( "0" .equals(sel)) {
return ;
// break; }
// } operation();
}
private void changeContact() {
System.out.println( "请输入要修改的联系人的序号:" );
int num=sc.nextInt();
sc.nextLine(); //吸掉换行符1
System.out.println( "请输入要修改的联系人的姓名:" );
String name=sc.nextLine();
System.out.println( "请输入要修改的联系人的姓别:" );
String sex=sc.nextLine();
System.out.println( "请输入要修改的联系人的电话:" );
String tel=sc.nextLine();
Element e=dao.change(delIds[num- 1 ],name,sex,tel);
if (e!= null ){
System.out.println(num+ "号联系人更新之后:姓名:" +e.getElementsByTagName( "name" ).item( 0 ).getTextContent()
+ "性别:" +e.getElementsByTagName( "sex" ).item( 0 ).getTextContent()
+ "电话号码:" +e.getElementsByTagName( "tel" ).item( 0 ).getTextContent());
} else {
System.out.println( "修改失败..." );
}
}
private void delContact() {
System.out.println( "请输入删除的联系人序号:" );
int num=sc.nextInt();
sc.nextLine(); //吸掉换行符
Element e=dao.delete(delIds[num- 1 ]);
if (e== null ){
System.out.println( "删除失败,无此联系人" );
} else {
System.out.println( "删除联系人:" +e.getElementsByTagName( "name" ).item( 0 ).getTextContent()+ "成功..." );
}
}
private void addContact() {
System.out.println( "请输入联系人信息:" );
System.out.println( "姓名:" );
String name=sc.nextLine();
System.out.println( "姓别:" );
String sex=sc.nextLine();
System.out.println( "电话:" );
String tel=sc.nextLine();
Element e=dao.add( name,sex, tel);
System.out.println( "添加联系人" +e.getElementsByTagName( "name" ).item( 0 ).getTextContent()+ "成功..." );
}
public static void main(String[] args) {
new contanctAction();
}
} |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我。