【安卓大作业】Android Studio图书管理系统 听雨轩
【安卓大作业】Android Studio图书管理系统 听雨轩
一、界面展示
二、功能介绍
登陆注册，借阅图书、收藏图书、修改个人信息、钱包充值、退出登录
三、关键代码展示
（1）database
public class DbHelper extends SQLiteOpenHelper {
private static final String SQL_BOOK= "create table if not exists "+Constants.TABLE_NAME_BOOK+"(" +
"number INTEGER NOT NULL primary key autoincrement," +
"type varchar(50) NOT NULL," +
"price float NOT NULL," +
"public_com varchar(50) DEFAULT '听雨喧出版社'," +
"count int(11) NOT NULL," +
"name varchar(50) NOT NULL," +
"cover varchar(50) DEFAULT NULL," +
"introduce varchar(128) DEFAULT NULL," +
"look_number int(11) default 0," +
"star_number int(11) default 0," +
"brow_number int(11) default 0" +
")";
private static final String SQL_USER= "create table if not exists "+Constants.TABLE_NAME_USER+"(" +
"id INTEGER NOT NULL primary key autoincrement," +
"type int(11) DEFAULT 1," +
"sex varchar(5) DEFAULT NULL," +
"major varchar(100) DEFAULT NULL," +
"classnum int(11) DEFAULT NULL," +
"name varchar(50) NOT NULL unique," +
"cover varchar(128) DEFAULT NULL," +
"age int(11) DEFAULT 0," +
"phone int(11) DEFAULT 0," +
"jointime datetime DEFAULT NULL," +
"email int(11) DEFAULT 0," +
"password varchar(50) not null"+
")";
private static final String SQL_OUT_BOOK= "create table if not exists "+Constants.TABLE_NAME_OUT_BOOK+"(" +
"id INTEGER primary key autoincrement," +
"outtime varchar(100) not null," +
"userid int(11) not null," +
"bookname varchar(51) not null," +
"duration int(11) default 30," +
"state int(11) default 0" +
")";
private static final String SQL_FAVIOR_BOOK= "create table if not exists "+Constants.TABLE_NAME_FAVOR+"(" +
"id INTEGER primary key autoincrement," +
"time varchar(100) not null," +
"userid int(11) not null," +
"bookname varchar(51) not null," +
"state int(11) default 1" +
")";
private static final String SQL_OPERATION = "create table if not exists "+Constants.TABLE_NAME_RECORD_OPERATION+"(" +
"id INTEGER primary key autoincrement," +
"operation varchar(128) not null," +
"username varchar(51) not null," +
"time varchar(100) not null" +
")";
public DbHelper(Context context){
super(context,"tingyuxuan.db",null,1);
}
public DbHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
super(context, name, factory, version);
}
@Override
public void onCreate(SQLiteDatabase sqLiteDatabase) {
//创建表
sqLiteDatabase.execSQL(SQL_BOOK);
sqLiteDatabase.execSQL(SQL_USER);
sqLiteDatabase.execSQL(SQL_OUT_BOOK);
sqLiteDatabase.execSQL(SQL_OPERATION);
sqLiteDatabase.execSQL(SQL_FAVIOR_BOOK);
System.out.println("数据库创建成功");
}
@Override
public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
}
public void addUser(String name,String pwd,String email,int type){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put("name",name);
values.put("password",pwd);
values.put("email",email);
values.put("type",type);
db.insert("user",null,values);
values.clear();
db.close();
}
public int getUserLevl(String name){
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select type from user where name='" + name + "'", null);
cursor.moveToLast();
int type=0;
try{
type= cursor.getInt(cursor.getColumnIndex("type"));
}catch (SQLException e){
e.printStackTrace();
}finally {
db.close();
return type;
}
}
public String getUserName(int id){
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select name from user where id='" + id + "'", null);
cursor.moveToLast();
String name="";
try{
name= cursor.getString(cursor.getColumnIndex("name"));
}catch (SQLException e){
e.printStackTrace();
}finally {
db.close();
return name;
}
}
//获取用户的id
public int getUserId(String name){
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select id from user where name='" + name + "'", null);
cursor.moveToLast();
int type=0;
try{
type= cursor.getInt(cursor.getColumnIndex("id"));
}catch (SQLException e){
e.printStackTrace();
}finally {
db.close();
return type;
}
}
public String getBookName(int id){
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery("select name from book where id=" + id , null);
cursor.moveToLast();
String nmae="";
try{
nmae= cursor.getString(cursor.getColumnIndex("name"));
}catch (SQLException e){
e.printStackTrace();
}finally {
db.close();
return nmae;
}
}
public List<BookBean> getAllBooks(){
List<BookBean> books = new ArrayList<>();
SQLiteDatabase db = this.getWritableDatabase();
//查询Book表中的所有数据
Cursor cursor = db.query("book", null, null, null, null, null, "number desc", null);
//遍历Curosr对象，取出数据并打印
while (cursor.moveToNext()) {
BookBean book = new BookBean();
String name = cursor.getString(cursor.getColumnIndex("name"));
String introduce = cursor.getString(cursor.getColumnIndex("introduce"));
String pub = cursor.getString(cursor.getColumnIndex("public_com"));
String type = cursor.getString(cursor.getColumnIndex("type"));
int count = cursor.getInt(cursor.getColumnIndex("count"));
int look_number = cursor.getInt(cursor.getColumnIndex("look_number"));
int star_number = cursor.getInt(cursor.getColumnIndex("star_number"));
int price = cursor.getInt(cursor.getColumnIndex("price"));
int id = cursor.getInt(cursor.getColumnIndex("number"));
book.setNumber(id);
book.setName(name);
book.setPublic_com(pub);
book.setLook_number(look_number);
book.setStar_number(star_number);
book.setIntroduce(introduce);
book.setCount(count);
book.setPrice(price);
book.setType(type);
books.add(book);
}
//关闭Cursor
cursor.close();
db.close();
return books;
}
public void addBook(BookBean book){
SQLiteDatabase db = this.getReadableDatabase();
ContentValues values = new ContentValues();
values.put("name",book.getName());
values.put("price",book.getPrice());
values.put("count",book.getCount());
values.put("introduce","这是有关："+book.getName()+"的介绍");
values.put("type",book.getType());
long book1 = db.insert("book", null, values);
System.out.println("-=-----book1---添加一本-"+book1);
values.clear();
db.close();
}
public void addBooks(){
SQLiteDatabase db = this.getReadableDatabase();
ContentValues values = new ContentValues();
Random random = new Random();
String bookName = Constants.getBookName(random.nextInt(100));
values.put("name", bookName);
values.put("price",random.nextInt(90)/2);
values.put("count",random.nextInt(40));
values.put("introduce","这是有关："+bookName+"的介绍");
values.put("type","文学");
db.insert("book",null,values);
values.clear();
db.close();
}
public void addDefaultData(){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
for(int i=1;i<11;i++){
Random random = new Random();
int index = random.nextInt(100);
String bookName = Constants.getBookName(index);
values.put("type","文学类");
values.put("price",i+index);
values.put("star_number",0);
values.put("public_com","听雨轩出版社");
values.put("count",20+i);
values.put("name",bookName+"传");
values.put("introduce","介绍："+bookName);
try {
long book = db.insert("book", null, values);
}catch (SQLException e){
e.printStackTrace();
}finally {
values.clear();
}
}
db.close();
}
public void addToMyBorreow(String username,String bookName) {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");// HH:mm:ss
//获取当前时间
Date date = new Date(System.currentTimeMillis());
String time = simpleDateFormat.format(date);
int userId = getUserId(username);
SQLiteDatabase db = this.getReadableDatabase();
ContentValues values = new ContentValues();
values.put("userid",userId);
values.put("bookname",bookName);
values.put("outtime",time);
try{
db.insert("outbook",null,values);
}catch (SQLException e){
e.printStackTrace();
}finally {
values.clear();
db.close();
}
}
public void getUserBorrows(String name){
String sql = "select j.outtime,b.name,j.duration from outbook j,book b,user u where u.name='"+name
+"' and u.id=j.userid and b.number=j.bookid ";
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(sql, null);
// db.query()
while(cursor.moveToNext()){
String outtime = cursor.getString(cursor.getColumnIndex("outtime"));
String name2 = cursor.getString(cursor.getColumnIndex("name"));
int duration = cursor.getInt(cursor.getColumnIndex("duration"));
}
}
public void selectAllBorrow(String name){
List<BorrowBean> books = new ArrayList<>();
int userId = getUserId(name);
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query("outbook", null, null, null, null, null, null);
while (cursor.moveToNext()){
int id = cursor.getInt(cursor.getColumnIndex("userid"));
if(userId == id){
BorrowBean bean = new BorrowBean();
String outtime = cursor.getString(cursor.getColumnIndex("outtime"));
String name2 = cursor.getString(cursor.getColumnIndex("name"));
bean.setTime(outtime);
bean.setName(name2);
System.out.println("------------------"+outtime+"---"+name2);
}
}
}
public List<UserBean> getAllUsers(){
List<UserBean> users = new ArrayList<>();
SQLiteDatabase db = this.getWritableDatabase();
// Cursor cursor = db.query("user", null, null, null, null, null, null);
Cursor cursor = db.rawQuery("select * from user order by id desc", null);
while(cursor.moveToNext()){
int id = cursor.getInt(cursor.getColumnIndex("id"));
int type = cursor.getInt(cursor.getColumnIndex("type"));
String name = cursor.getString(cursor.getColumnIndex("name"));
String sex = cursor.getString(cursor.getColumnIndex("sex"));
String major = cursor.getString(cursor.getColumnIndex("major"));
String email = cursor.getString(cursor.getColumnIndex("email"));
String pwd = cursor.getString(cursor.getColumnIndex("password"));
UserBean bean = new UserBean();
bean.setType(type);
bean.setPassword(pwd);
bean.setId(id);
bean.setMajor(major);
bean.setSex(sex);
bean.setEmail(email);
bean.setName(name);
users.add(bean);
}
cursor.close();
db.close();
return users;
}
}