基于JDBC的通讯录管理系统
文章目录
- 1.设计阶段
- 1.1需求分析
- 1.2通讯录管理系统的功能图
- 1.3通讯录管理系统的用例图
- 1.4通讯录管理系统的E-R图
- 2.数据库设计
- 3.程序设计
- 2.1function
- 2.1.1设计ContactPerson类
- 2.1.2设计DBUtils类
- 2.1.3设计ContactHandle接口
- 2.1.4设计ContactFunction类
- 2.2ContactTest
1.设计阶段
1.1需求分析
通讯录中需要存储姓名，地址，电话号码，邮政编码，Email，家庭电话等信息。
程序应提供的基本管理功能有：
1、添加：增加一个人的记录（包括姓名，地址，电话号码，邮政编码，Email，家庭电话等信息）到通信录中。
2、显示：在屏幕上显示所有通信录中的联系人的全部信息（包括姓名，地址，电话号码，邮政编码，Email，家庭电话等信息）。
3、存储：将通讯录信息保存在数据库表中。
4、查询：可根据姓名查找某人的相关信息，若找到显示该联系人的其他信息（包括姓名，地址，电话号码，邮政编码，Email，家庭电话等信息）。
5、修改：输入一个人的姓名，若姓名存在，则对其他内容进行修改，若不存在则显示修改失败
6、排序：可以根据据条目的某个项对所有条目进行排序，如姓名。
1.2通讯录管理系统的功能图
1.3通讯录管理系统的用例图
1.4通讯录管理系统的E-R图
2.数据库设计
3.程序设计
2.1function
2.1.1设计ContactPerson类
package function;
//联系人类
public class ContactPerson {
private String name;
private String address;
private String num;
private String postal_code; //邮政编码
private String e_mail;
private String home_phon; //家庭电话
public void setName(String name) {
this.name = name;
}
public void setAdd(String address) {
this.address = address;
}
public void setNum(String num) {
this.num = num;
}
public void setPostal_code(String postal_code) {
this.postal_code = postal_code;
}
public void setE_mail(String e_mail) {
this.e_mail = e_mail;
}
public void setHome_phon(String home_phon) {
this.home_phon = home_phon;
}
public String getName() {
return name;
}
public String getAdd() {
return address;
}
public String getNum() {
return num;
}
public String getPostal_code() {
return postal_code;
}
public String getE_mail() {
return e_mail;
}
public String getHome_phon() {
return home_phon;
}
@Override
public String toString() {
return "ContactPerson{" + "name='" + name + '\'' + ", address='" + address + '\'' + ", num='" + num + '\'' + ", postal_code='" + postal_code + '\'' + ", e_mail='" + e_mail + '\'' + ", home_phon='" + home_phon + '\'' + '}';
}
}
2.1.2设计DBUtils类
package function;
import java.sql.*;
public class DBUtils {
private static String url = "jdbc:mysql://127.0.0.1:3306/text?useSSL=false&useUnicode=yes&characterEncoding=UTF-8";
private static String user = "root"; //数据库用户名
private static String password = "123456"; //数据库密码
public static Connection getConn() throws SQLException, ClassNotFoundException {
//1.加载驱动程序
Class.forName("com.mysql.jdbc.Driver");
//2.获得数据库的连接
return DriverManager.getConnection(url, user, password);
}
public static void close(Statement stat, Connection conn, ResultSet res) {
//关闭结果集
if( stat != null){
try {
stat.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
//关闭命令
if( conn != null){
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
//关闭连接
if( res != null){
try {
res.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
2.1.3设计ContactHandle接口
package function;//通讯录功能接口
import java.sql.SQLException;
public interface ContactHandle {
public abstract void add(String name,String address,String num,String postal_code,String e_mail,String home_phon);
//添加
public abstract void remove(String name) throws SQLException, ClassNotFoundException;
//删除
public abstract void update(String name,String address,String num,String postal_code,String e_mail,String home_phon);
//修改
public abstract ContactPerson selectName(String name);
//根据姓名查询
public abstract ContactPerson selectNum(String num);
//根据电话查询
public abstract void sort() throws SQLException;
//排序
public abstract void show();
//显示所有联系人
public void save();
//保存到本地
}
2.1.4设计ContactFunction类
package function;
import com.mysql.jdbc.Connection;
import java.io.*;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
public class ContactFunction implements ContactHandle {
private Connection conn;
private PreparedStatement pst;
private ResultSet res;
@Override
public void add(String name, String address, String num, String postal_code, String e_mail, String home_phon) {
try {
conn = (Connection) DBUtils.getConn();
String sql = "insert into conperson(name,address,num,postal_code,e_mail,home_phon) values (?,?,?,?,?,?)";
pst=conn.prepareStatement(sql); // 预编译sql语句
//repareStatement这个方法会将SQL语句加载到驱动程序conn集成程序中
//但是并不直接执行,而是当它调用execute()方法的时候才真正执行
pst.setString(1,name); //给第1个占位符赋值
pst.setString(2,address);
pst.setString(3,num);
pst.setString(4,postal_code);
pst.setString(5,e_mail);
pst.setString(6,home_phon);
pst.executeUpdate(); // 执行SQL语句
} catch (SQLException e) {
} catch (ClassNotFoundException e) {
}finally {
DBUtils.close(pst,conn,res);
}
}
@Override
public void remove(String name) {
try {
conn = (Connection) DBUtils.getConn();
String sql = "delete from conperson where name=?";
pst=conn.prepareStatement(sql);// 预编译sql语句
pst.setString(1,name);
pst.executeUpdate();// 执行SQL语句
} catch (SQLException e) {
} catch (ClassNotFoundException e) {
}finally {
DBUtils.close(pst,conn,res);
}
}
@Override
public void update(String name,String address,String num,String postal_code,String e_mail,String home_phon) {
ContactFunction contactFunction = new ContactFunction();
contactFunction.remove(name);
contactFunction.add(name,address,num,postal_code,e_mail,home_phon);
}
@Override
public ContactPerson selectName(String name) {
ContactPerson person = null;
try{
conn = (Connection) DBUtils.getConn();
String sql = "select * from conperson where name = ?";
pst=conn.prepareStatement(sql);// 预编译sql语句
pst.setString(1,name);
res = pst.executeQuery();// 执行SQL语句
if(res.next()){
person = new ContactPerson();
person.setName(res.getString("name"));
person.setAdd(res.getString("address"));
person.setNum(res.getString("num"));
person.setPostal_code(res.getString("postal_code"));
person.setE_mail(res.getString("e_mail"));
person.setHome_phon(res.getString("home_phon"));
}
}catch (SQLException e){
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (Throwable e) {
e.printStackTrace();
}finally {
DBUtils.close(pst,conn,res);
return person;
}
}
@Override
public ContactPerson selectNum(String num) {
ContactPerson person = null;
try{
conn = (Connection) DBUtils.getConn();
String sql = "select * from conperson where num = ?";
pst=conn.prepareStatement(sql);// 预编译sql语句
pst.setString(1,num);
res = pst.executeQuery();// 执行SQL语句
if(res.next()) {
person = new ContactPerson();
person.setName(res.getString("name"));
person.setAdd(res.getString("address"));
person.setNum(res.getString("num"));
person.setPostal_code(res.getString("postal_code"));
person.setE_mail(res.getString("e_mail"));
person.setHome_phon(res.getString("home_phon"));
}
}catch (SQLException e){
} catch (ClassNotFoundException e) {
}finally {
DBUtils.close(pst,conn,res);
return person;
}
}
@Override
public void sort() {
List<ContactPerson> list = new ArrayList<>();
try {
conn = (Connection) DBUtils.getConn();
String sql = "SELECT * FROM conperson ORDER BY CONVERT(NAME USING GB2312)";
pst = conn.prepareStatement(sql);
res = pst.executeQuery();
while(res.next()){
ContactPerson person = new ContactPerson();
person.setName(res.getString("name"));
person.setAdd(res.getString("address"));
person.setNum(res.getString("num"));
person.setPostal_code(res.getString("postal_code"));
person.setE_mail(res.getString("e_mail"));
person.setHome_phon(res.getString("home_phon"));
list.add(person);
}
for(ContactPerson c:list){
System.out.println(c.toString());
}
} catch (SQLException e) {
} catch (ClassNotFoundException e) {
}finally {
DBUtils.close(pst,conn,res);
}
}
@Override
public void show() {
List<ContactPerson> list = new ArrayList<>();
try {
conn = (Connection) DBUtils.getConn();
String sql = "select * from conperson";
pst=conn.prepareStatement(sql);
res = pst.executeQuery();
while(res.next()){
ContactPerson person = new ContactPerson();
person.setName(res.getString("name"));
person.setAdd(res.getString("address"));
person.setNum(res.getString("num"));
person.setPostal_code(res.getString("postal_code"));
person.setE_mail(res.getString("e_mail"));
person.setHome_phon(res.getString("home_phon"));
list.add(person);
}
for(ContactPerson c:list){
System.out.println(c.toString());
}
} catch (SQLException e) {
} catch (ClassNotFoundException e) {
}finally {
DBUtils.close(pst,conn,res);
}
}
@Override
public void save(){
try {
conn = (Connection) DBUtils.getConn();
List<ContactPerson> list = new ArrayList<>();
String sql = "select * from conperson";
pst=conn.prepareStatement(sql);
res = pst.executeQuery();
while(res.next()){
ContactPerson person = new ContactPerson();
person.setName(res.getString("name"));
person.setAdd(res.getString("address"));
person.setNum(res.getString("num"));
person.setPostal_code(res.getString("postal_code"));
person.setE_mail(res.getString("e_mail"));
person.setHome_phon(res.getString("home_phon"));
list.add(person);
}
File writename = new File("data\\test.text");
BufferedWriter out = new BufferedWriter(new FileWriter(writename));
//BufferedWriter字符缓冲流
//为了提高字符流读写的效率，引入了缓冲机制，进行字符批量的读写，提高了单个字符读写的效率
for(ContactPerson c:list){
out.write(c.toString());
out.write("\r\n"); // \r\n即为换行
}
out.flush(); // 把缓存区内容压入文件
out.close(); // 最后记得关闭文件
} catch (Exception e) {
e.printStackTrace();
}finally {
DBUtils.close(pst,conn,res);
}
}
}
2.2ContactTest
import function.ContactFunction;
import function.ContactPerson;
import java.sql.SQLException;
import java.util.Scanner;
public class ContactTest {
public static void main(String[] args) throws SQLException, ClassNotFoundException {
ContactFunction address = new ContactFunction();
Scanner sc = new Scanner(System.in);
while (true) {
System.out.println("***********[A]添加 [B]修改***********");
System.out.println("***********[C]删除 [D]显示***********");
System.out.println("***********[E]根据名字查询 [F]根据手机号查询*");
System.out.println("***********[G]根据姓名排序 [H]保存通讯录*****");
System.out.println("********************[I]退出*******************");
System.out.println("**********请输入您的选择 不区分大小写*********");
String strFountion = sc.nextLine();
if ("a".equalsIgnoreCase(strFountion)) { // 添加
System.out.print("请输入您要添加的名字:");
String name = sc.nextLine();
System.out.print("请输入您要添加的住址:");
String adr = sc.nextLine();
System.out.print("请输入您要添加的电话号码:");
String num = sc.nextLine();
System.out.print("请输入您要添加的邮政编码:");
String post = sc.nextLine();
System.out.print("请输入您要添加的电子邮箱:");
String e = sc.nextLine();
System.out.print("请输入您要添加的家庭电话:");
String phone= sc.nextLine();
address.add(name,adr,num,post,e,phone);
} else if ("b".equalsIgnoreCase(strFountion)) {// 修改
System.out.println("请输入您要修改的联系人的姓名是?");
String name = sc.nextLine();
if(address.selectName(name)==null){
System.out.println("修改的"+name+"不存在\r\n"+"修改失败！");
}else {
System.out.print("请您输入修改后的住址：");
String adr = sc.nextLine();
System.out.print("请您输入修改后的电话号码:");
String num = sc.nextLine();
System.out.print("请您输入修改后的邮政编码:");
String post = sc.nextLine();
System.out.print("请您输入修改后的电子邮箱:");
String e = sc.nextLine();
System.out.print("请您输入修改后的家庭电话:");
String phone = sc.nextLine();
address.update(name, adr, num, post, e, phone);
}
} else if ("c".equalsIgnoreCase(strFountion)) {// 删除
System.out.println("请输入您要删除的联系人的姓名是?");
String name1 = sc.nextLine();
System.out.println("您确定要删除的联系人的姓名是" + name1 + "确定为Y,不确定为N");
String name2 = sc.nextLine();
if ("y".equalsIgnoreCase(name2)) {
if(address.selectName(name1) == null){
System.out.println("查无此人！！！删除失败！！");
}else{
address.remove(name1);
}
} else if ("n".equalsIgnoreCase(name2)) {
System.out.println("退出删除");
break;
} else {
System.out.println("您输入的不是Y和N,退出删除功能");
break;
}
} else if ("d".equalsIgnoreCase(strFountion)) {// 显示
address.show();
} else if ("e".equalsIgnoreCase(strFountion)) {// 查询
System.out.println("请输入您要查询的名字");
String name = sc.nextLine();
ContactPerson contactPerson = address.selectName(name);
if (contactPerson == null) {
System.out.println("查询无此人");
} else {
System.out.println("查询有此人");
System.out.println(contactPerson);
}
} else if ("f".equalsIgnoreCase(strFountion)) {// 根据手机号查询
System.out.println("请输入您要查询的手机号");
String num = sc.nextLine();
ContactPerson contactPerson= address.selectNum(num);
if (contactPerson != null) {
System.out.println("查询有此人");
System.out.println(contactPerson);
} else {
System.out.println("查询无此人");
}
} else if ("g".equalsIgnoreCase(strFountion)) {//排序
address.sort();
} else if("h".equalsIgnoreCase(strFountion)){
address.save();
System.out.println("保存成功");
} else if ("i".equalsIgnoreCase(strFountion)){//退出
System.out.println("退出成功");
break;
}else {// 删除
System.out.println("您输入的选项有误,请重新输入");
}
}
sc.close();
}
}