下载地址：https://download.csdn.net/download/u011612364/13985581
package YLBlibrary;
//作者 杨丽冰 201831064402
先上数据库设计
用户
查询效果：
具体代码实现：
图书类Book.java
package YLBlibrary;
//作者 swpu杨丽冰 201831064402
public class Book {
private int Bno;
private String name;//书名
private String author;//作者
private String borrowerId;//借阅证号
private String borrowerName;//借阅者姓名
private double price;//价格
public Book() {
}
public Book(String name, double price) {
this.name = name;
this.price = price;
}
public int getBno() {
return Bno;
}
public void setBno(int Bno) {
this.Bno = Bno;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getPrice() {
return price;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public void setPrice(double price) {
this.price = price;
}
//借书人id
public String getBorrowerId() {
return borrowerId;
}
//借书人姓名
public void setBorrowerId(String borrowerId) {
this.borrowerId = borrowerId;
}
public String getBorrowerName() {
return borrowerName;
}
//借书人姓名
public void setBorrowerName(String borrower) {
this.borrowerName = borrower;
}
}
用户类
package YLBlibrary;
//作者 杨丽冰 201831064402
import java.util.List;
import javax.swing.JTextArea;
public class User {
String ID;// 用户
String userName;// 密码
String passwd;
String phone;
// 获取ID
public String getID() {
return ID;
}
public void setID(String iD) {
ID = iD;
}
public String getUser() {
return userName;
}
public void setUser(String userName) {
this.userName = userName;
}
public String getPasswd() {
return passwd;
}
public void setPasswd(String passwd) {
this.passwd = passwd;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
//查询
public void qury(JTextArea text,String mode,String name) throws Exception {
text.setText(" ");
text.append("书本编号\t书名\t价格\t作者\t借阅证号\t借阅者姓名\n");
String str = null;
if(mode.equals("name")) {
str ="select "
+ "Bno, book_name, book_price, book_author,borrower_id, borrower_name "
+ "from tb_books where book_name like '%"+name+"%'";
}
if(mode.equals("aname")) {
str ="select "
+ "Bno, book_name, book_price, book_author,borrower_id, borrower_name "
+ "from tb_books where book_author like '%"+name+"%'";
}
SqlSlove query = new SqlSlove();
//query.query(text,str);
List<Book> list = query.query(str);
for(int i = 0; i < list.size(); i++) {
Book book = (Book)list.get(i);
String price = String.format("%.2f",book.getPrice());
String s = book.getBno()+"\t"+book.getName()+"\t"+price+"\t"+book.getAuthor()+"\t"+book.getBorrowerId()+"\t"+book.getBorrowerName();
System.out.println(s);
text.append(s+"\n");
}
}
//借书
public int lend(int Bno,String name,String id) throws Exception {
String str ="select "
+ "Bno, book_name, book_price, book_author,borrower_id, borrower_name "
+ "from tb_books where Bno="+Bno;
SqlSlove query = new SqlSlove();
List<Book> list = query.query(str);
if(list.size() == 0) {
return 0;
}
else {
Book book =(Book)list.get(0);
book.setBorrowerId(id);
book.setBorrowerName(name);
System.out.println(book.getBno()+"\t"+book.getName()+"\t"+book.getPrice()+"\t"+book.getAuthor()+"\t"+book.getBorrowerId()+"\t"+book.getBorrowerName());
SqlSlove slo=new SqlSlove();
slo.changeBook(book);
return 1;
}
}
//还书
public int borrow(int Bno,String id) throws Exception {
String str ="select "
+ "Bno, book_name, book_price, book_author,borrower_id, borrower_name "
+ "from tb_books where Bno="+Bno;
SqlSlove query = new SqlSlove();
List<Book> list = query.query(str);
if(list.size() == 0) {
return 0;
}
else {
Book book =(Book)list.get(0);
if(Bno == book.getBno()&& id.equals(book.getBorrowerId())) {
System.out.println(book.getBno()+"\t"+book.getName()+"\t"+book.getPrice()+"\t"+book.getAuthor()+"\t"+book.getBorrowerId()+"\t"+book.getBorrowerName());
SqlSlove slo=new SqlSlove();
book.setBorrowerId(null);
book.setBorrowerName(null);
slo.changeBook(book);
}
return 1;
}
}
}
管理员类
package YLBlibrary;
import java.sql.SQLException;
import java.util.List;
public class Ad extends User {
public Ad() {
}
//添加
public void addbook(int id,String name,String author,double price ) {
SqlSlove addb = new SqlSlove();
Book book = new Book();
book.setBno(id);
book.setName(name);
book.setPrice(price);
book.setAuthor(author);
try {
addb.addBook(book);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//删除
public void deletebook(int id) {
SqlSlove deleteb = new SqlSlove();
Book book = new Book();
book.setBno(id);
try {
deleteb.delBook(id);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//更新
public void updatebook(int id,String name,String price,String author) throws Exception {
String str ="select "
+ "Bno, book_name, book_price, book_author,borrower_id, borrower_name "
+ "from tb_books where Bno="+id;
SqlSlove slo = new SqlSlove();
List<Book> list = slo.query(str);
Book book =(Book)list.get(0);
if(name!=null && !name.equals(" "))
book.setName(name);
if(price!=null&& !price.equals(" ")) {
double pri = Double.parseDouble(price);
book.setPrice(pri);
}
if(author!=null&& !author.equals(" "))
book.setAuthor(author);
try {
slo.changeBook(book);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
登录控制类
package YLBlibrary;
import java.sql.SQLException;
import java.util.Iterator;
import java.util.List;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
//作者 杨丽冰 201831064402
public class Contro {
//注册用户
public int adduser(String id,String passwd,String name,String phone ) {
SqlSlove addb = new SqlSlove();
User user = new User();
user.setID(id);
user.setUser(name);
user.setPasswd(passwd);
user.setPhone(phone);
try {
addb.addUser(user);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return 0;
}
System.out.println("aa"+user.getID()+user.getPasswd()+user.getUser()+user.getPhone());
return 1;
}
//登录验证
public int loginConf(String id,String pwd) {
SqlSlove addb = new SqlSlove();
int state;
try {
state = addb.conUser(id, pwd);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return 0;
}
if(state == 1)
return 1;
else
return 0;
}
//查找密码
public void FindPaw(User user) throws Exception {
SqlSlove slo = new SqlSlove();
slo.FindUser(user.getID(), user.getPasswd());
}
}
数据库操作类，实现了java对数据库的操作
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JTextArea;
public class SqlSlove {
ResultSet rs = null;
Statement stmt = null;
//添加图书
public void addBook(Book book) throws Exception{
Connection con = SqlConnect.getConnection();
String sql="insert into tb_books"
+ "(Bno, book_name, book_price, book_author,borrower_id, borrower_name) "
+ "values(?,?,?,?,?,?)";
PreparedStatement psmt = con.prepareStatement(sql);
// 先对应SQL语句，给SQL语句传递参数
psmt.setInt(1,book.getBno());
psmt.setString(2, book.getName());
psmt.setDouble(3, book.getPrice());
psmt.setString(4, book.getAuthor());
if (book.getBorrowerId() == null || book.getBorrowerId() == "") {
psmt.setString(5, null);
}
else {
psmt.setString(5, book.getBorrowerId());
}
if (book.getBorrowerName() == null || book.getBorrowerName() == "") {
psmt.setString(6, null);
}
else {
psmt.setString(6, book.getBorrowerId());
}
psmt.execute();
}
//删除图书
public void delBook(int ID) throws SQLException{
// 首先拿到数据库的连接
Connection con=SqlConnect.getConnection();
String sql="" +
"DELETE FROM tb_books "+
"WHERE Bno = ?";
PreparedStatement psmt = con.prepareStatement(sql);
psmt.setInt(1, ID);
// 执行SQL语句
psmt.execute();
}
//添加用户
public void addUser(User user) throws Exception{
Connection con = SqlConnect.getConnection();
String sql="insert into tb_users"
+ "(ID,passwd,userName, phone) "
+ "values(?,?,?,?)";
PreparedStatement psmt = con.prepareStatement(sql);
// 先对应SQL语句，给SQL语句传递参数
psmt.setString(1,user.getID());
psmt.setString(2, user.getPasswd());
if (user.getUser() == null|| user.getUser() == "") {
psmt.setString(3, null);
}
else {
psmt.setString(3, user.getUser());
}
if (user.getPhone() == null || user.getPhone() == "") {
psmt.setString(4, null);
}
else {
psmt.setString(4, user.getPhone());
}
psmt.execute();
}
//登录确认
public int conUser(String ID,String pwd) throws Exception{
Connection con = SqlConnect.getConnection();
String sql="select passwd from tb_users where ID = '"+ID+"'and passwd = '"+pwd+"'";
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(sql);
if(rs.next()) {
System.out.println("登录成功");
return 1;
}
else {
System.out.println("登录失败");
return 0;
}
}
//修改密码
public void FindUser(String id,String pwd) throws Exception{
Connection con = SqlConnect.getConnection();
String sql="Update tb_users set passwd = ? where ID = ? ";
PreparedStatement psmt = con.prepareStatement(sql);
// 先对应SQL语句，给SQL语句传递参数
psmt.setString(1,pwd);
psmt.setString(2,id);
System.out.println("触发修改");
psmt.execute();
}
// 更新图书信息
public void changeBook(Book book) throws SQLException{
// 首先拿到数据库的连接
Connection con=SqlConnect.getConnection();
String sql="update tb_books set Bno = ?, book_name = ? , book_price = ? , book_author = ?,borrower_id = ?, borrower_name = ? where Bno = ? ";
PreparedStatement psmt = con.prepareStatement(sql);
// 先对应SQL语句，给SQL语句传递参数
System.out.println(book.getAuthor());
System.out.println(book.getBno());
psmt.setInt(1,book.getBno());
psmt.setString(2,book.getName());
psmt.setDouble(3,book.getPrice());
psmt.setString(4,book.getAuthor());
psmt.setString(5,book.getBorrowerId());
psmt.setString(6,book.getBorrowerName());
psmt.setInt(7,book.getBno());
// 执行SQL语句
psmt.execute();
}
//查询图书信息
public List<Book> query(String sql) throws Exception{
Connection con = SqlConnect.getConnection();
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(sql);
List<Book> bookList = new ArrayList<Book>();
Book book = null;
// 如果对象中有数据，就会循环打印出来
while (rs.next()){
String str = rs.getString(1)+"\t"+rs.getString(2)+"\t"+rs.getString(3)+"\t"+rs.getString(4)+"\t"+rs.getString(5)+"\t"+rs.getString(6);
book = new Book();
book.setBno(rs.getInt("Bno"));
book.setName(rs.getString("book_name"));
book.setAuthor(rs.getString("book_author"));
book.setPrice(rs.getFloat("book_price"));
book.setBorrowerId(rs.getString("borrower_id"));
book.setBorrowerName(rs.getString("borrower_name"));
bookList.add(book);
}
return bookList;
}
}
//数据库连接类
package YLBlibrary;
//作者 杨丽冰 201831064402
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class SqlConnect {
//System.out.println("数据库原理及应用--杨丽冰 201831064402");
static String connectionUrl = "jdbc:sqlserver://localhost:1433;databaseName=MyDb";
static Connection con = null;
static Statement stmt = null;
static ResultSet rs = null;
static{
System.out.println("正在连接数据库和检索，请等待...");
try {
//Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
con = DriverManager.getConnection(connectionUrl,"sa","123456");
}
catch (Exception e) {
e.printStackTrace();
}
}
// 对外提供一个方法来获取数据库连接
public static Connection getConnection(){
return con;
}
}
全局类，当前登录用户
package YLBlibrary;
public class Globle {
static User userLog = new User();
void set(User user)
{
userLog = user;
}
User get()
{
return userLog;
}
}