​​相关 知识 >>>​​

​​相关 练习 >>>​​

实现要求：

使用所学Spring知识，实现简易的图书查询系统功能。

要求如下：

• • 
    
• 查询全部图书。
• 根据书籍编号查询信息。
• 根据书名查询书籍信息。
• 根据状态查询书籍信息。
  • 
    

运行结果：

实现思路：

具体实现步骤：

（1）在MySQL数据库中创建t00_book表，代码如下：

-- ----------------------------
-- Table structure for t00_book
-- ----------------------------
DROP TABLE IF EXISTS `t00_book`;
CREATE TABLE `t00_book`  (
  `bookId` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '图书编号',
  `bookName` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '图书名字',
  `author` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '作者',
  `pages` int(11) NULL DEFAULT NULL COMMENT '页数',
  `flag` char(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '状态（0-借出，1-在库）'
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

（2）在t00_book表中插入初始化数据，代码如下：

-- ----------------------------
-- Records of t00_book
-- ----------------------------
INSERT INTO `t00_book` VALUES ('1000', '《西游记》', '吴承恩', 324, '1');
INSERT INTO `t00_book` VALUES ('1002', '《红楼梦》', '曹雪芹', 425, '1');
INSERT INTO `t00_book` VALUES ('1003', '《三国演义》', '罗贯中', 346, '1');
INSERT INTO `t00_book` VALUES ('1004', '《水浒传》', '施耐庵', 298, '1');
INSERT INTO `t00_book` VALUES ('1005', '《儒林外史》', '吴敬梓', 234, '1');
INSERT INTO `t00_book` VALUES ('1006', '《离骚》', '屈原', 186, '1');
INSERT INTO `t00_book` VALUES ('1007', '《牡丹亭》', '汤显祖', 168, '1');
INSERT INTO `t00_book` VALUES ('1007', 'Python高级编程', '张大大', 322, '1');

（3）引入jar包：

（4）在applicationContext.xml配置文件中打开注解扫描功能，代码如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns="http://www.springframework.org/schema/beans" 
    xmlns:p="http://www.springframework.org/schema/p" 
    xmlns:context="http://www.springframework.org/schema/context" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-4.2.xsd 
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-4.2.xsd ">

  <!-- 开启注解扫描功能  -->
  <context:component-scan base-package="com.mhys.book"></context:component-scan>



</beans>

（5）在com.mhys.book.pojo包下创建DataSource类，添加driverClassName，url，username，password4个属性，然后又注入属性值，代码如下：

package com.mhys.book.pojo;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class DataSource {
  @Value("com.mysql.jdbc.Driver")
  private String driverClassName;
  @Value("jdbc:mysql://127.0.0.1:3306/t00_book")
  private String url;
  @Value("root")
  private String username;
  @Value("123456")
  private String password;

  public String getDriverClassName() {
    return driverClassName;
  }
  public void setDriverClassName(String driverClassName) {
    this.driverClassName = driverClassName;
  }
  public String getUrl() {
    return url;
  }
  public void setUrl(String url) {
    this.url = url;
  }
  public String getUsername() {
    return username;
  }
  public void setUsername(String username) {
    this.username = username;
  }
  public String getPassword() {
    return password;
  }
  public void setPassword(String password) {
    this.password = password;
  }



}

（6）在com.mhys.book.pojo包下创建Book类，添加bookId，bookName，author，pages，flag5个属性，然后注入属性值，代码如下

package com.mhys.book.pojo;

public class Book {
  private String bookId;
  private String bookName;
  private String author;
  private int pages;
  private String flag;

  public String getBookId() {
    return bookId;
  }
  public void setBookId(String bookId) {
    this.bookId = bookId;
  }
  public String getBookName() {
    return bookName;
  }
  public void setBookName(String bookName) {
    this.bookName = bookName;
  }
  public String getAuthor() {
    return author;
  }
  public void setAuthor(String author) {
    this.author = author;
  }
  public int getPages() {
    return pages;
  }
  public void setPages(int pages) {
    this.pages = pages;
  }
  public String getFlag() {
    return flag;
  }
  public void setFlag(String flag) {
    this.flag = flag;
  }


}

（7）在com.mhys.book.dao包下创建BaseDao类，添加dataSource属性并注入属性值，然后声明getCounection()方法，代码如下：

package com.mhys.book.dao;

import java.sql.Connection;
import java.sql.DriverManager;


import java.sql.PreparedStatement;
import java.sql.ResultSet;

import javax.annotation.PostConstruct;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.mhys.book.pojo.DataSource;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class BaseDao {
  @Autowired
  private DataSource dataSource;

  @PostConstruct
  public Connection getConnection() throws Exception{
    Class.forName(dataSource.getDriverClassName());
    String url = dataSource.getUrl();
    String user = dataSource.getUsername();
    String password = dataSource.getPassword();
    Connection connection = DriverManager.getConnection(url, user, password);

    return connection;
  }

  public void close(ResultSet rs,PreparedStatement ps,Connection conn) throws Exception{
    if(rs != null){
      rs.close();
    }
    if(ps != null){
      ps.close();
    }
    if(conn != null){
      conn.close();
    }
  }

}

（8）在com.mhys.book.dao包下创建BookDao类，声明getAllBooksInfo()方法、getBooksInfoByid()方法，添加getBooksInfoByBookName()方法和getBooksInfoByflag()方法，代码如下：

package com.mhys.book.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

import org.junit.Test;
import org.springframework.stereotype.Component;


@Component
public class BookDao extends BaseDao {

  //查询全部
  public ResultSet getAllBooksInfo() throws Exception{
    String sql = "select bookId,bookName,author,pages,flag from t00_book";
    Connection connection = this.getConnection();
    PreparedStatement ps = connection.prepareStatement(sql);
    ResultSet rs = ps.executeQuery();
    return rs;
  }

  //根据书籍编号查询信息
  public ResultSet getBooksInfoById(String bookId) throws Exception{
    String sql = "select bookId,bookName,author,pages,flag from t00_book where bookId=?";
    Connection connection = this.getConnection();
    PreparedStatement ps = connection.prepareStatement(sql);
    ps.setString(1, bookId);
    ResultSet rs = ps.executeQuery();
    return rs;
  }

  //根据书名查询书籍信息
  public ResultSet getBooksInfoByBookName(String bookName) throws Exception{
    String sql = "select bookId,bookName,author,pages,flag from t00_book where bookName like ?";
    Connection connection = this.getConnection();
    PreparedStatement ps = connection.prepareStatement(sql);
    ps.setString(1, "%"+bookName+"%");
    ResultSet rs = ps.executeQuery();
    return rs;
  }

  //根据状态查询书籍信息
  public ResultSet getBooksInfoByflag(String flag) throws Exception{
    String sql = "select bookId,bookName,author,pages,flag from t00_book where flag=?";
    Connection connection = this.getConnection();
    PreparedStatement ps = connection.prepareStatement(sql);
    ps.setString(1, flag);
    ResultSet rs = ps.executeQuery();
    return rs;
  }


}

（9）在com.mhys.book.service包下创建BookService类，添加bookDao属性并注入属性值，然后声明 getAllBooksInfo() 方法和 getBooksInfoById()方法、getBooksInfoByBookName()方法、getBooksInfoByflag()方法、和print()方法，代码如下：

package com.mhys.book.service;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.mhys.book.dao.BookDao;

@Component
public class BookService {
  @Autowired
  private BookDao bookDao;

  //查询全部
  public void getAllBooksInfo() throws Exception{
    ResultSet rs =  bookDao.getAllBooksInfo();
    print(rs);
  }

  //根据书籍编号查询信息
  public void getBooksInfoById(String bookId) throws Exception{
    ResultSet rs =  bookDao.getBooksInfoById(bookId);
    print(rs);
  }

  //根据书名查询书籍信息
  public void getBooksInfoByBookName(String bookName) throws Exception{
    ResultSet rs =  bookDao.getBooksInfoByBookName(bookName);
    print(rs);
  }

  //根据状态查询书籍信息
  public void getBooksInfoByflag(String flag) throws Exception{
    ResultSet rs = bookDao.getBooksInfoByflag(flag);
    print(rs);
  }

  //释放资源
  public void close(String flag) throws Exception{
    ResultSet rs = bookDao.getBooksInfoByflag(flag);
    print(rs);
  }

  //打印结果
  public void print(ResultSet rs) throws SQLException{
    if(rs==null){
      System.out.println("查询无结果！");
    }else{
      System.out.println("编号\t\t书名\t\t作者\t\t总页数\t\t状态");
      while (rs.next()) {
          for (int i = 1; i <= 5; i++) {
            String value = "";
            if(i==5){
              value = rs.getString(i).equals("0")?"借出":"在库";
            }else{
              value = rs.getString(i);
            }
            System.out.print(value+"\t\t");
          }
          System.out.println("");
      }
    }

  }
}

（10）在com.mhys.book.main包下创建MainClass类，添加bookService属性并注入属性值，然后声明main()方法、start()方法、printMenu()方法、getAllBooksInfo()方法、getBooksInfoById()方法、getBooksInfoByBookName()方法、getBooksInfoByflag()方法，代码如下：

package com.mhys.book.main;

import java.util.Scanner;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Component;

import com.mhys.book.service.BookService;

@Component
public class MainClass {
  @Autowired
  private BookService bookService;

  public static void main(String[] args) throws Exception {
    ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
    MainClass main = (MainClass) context.getBean("mainClass");
    main.start();
  }

  public void start() throws Exception{
    Scanner scan = new Scanner(System.in);
    System.out.println("----------欢迎使用图书管理查询系统----------");
    printMenu();

    while(true)
    {
      //读取用户输入
      int choice = scan.nextInt();

      if(choice == 5)
      {
        System.out.println("成功退出系统，欢迎再次光临！");
        break;
      }
      switch(choice)//switch形式
      {
      case 1: getAllBooksInfo(); break;
      case 2: getBooksInfoById(); break;
      case 3: getBooksInfoByBookName(); break;
      case 4: getBooksInfoByflag(); break;
      default: System.out.println("输入非法"); 
      continue;
      }
      printMenu(); 
    }

  }

  public void printMenu(){
    System.out.println("请选择查询条件：1、查询全部\t2、根据书籍编号查询\t3、根据书籍名称查询\t4、根据状态查询\t5、退出系统");
  }

  public void getAllBooksInfo() throws Exception{
    bookService.getAllBooksInfo();
  }
  public void getBooksInfoById() throws Exception{
    Scanner scan = new Scanner(System.in);
    System.out.println("请输入书籍编号：");
    String bookId = scan.next();
    bookService.getBooksInfoById(bookId);
  }
  public void getBooksInfoByBookName() throws Exception{
    Scanner scan = new Scanner(System.in);
    System.out.println("请输入书名：");
    String bookName = scan.next();
    bookService.getBooksInfoByBookName(bookName);
  }
  public void getBooksInfoByflag() throws Exception{
    Scanner scan = new Scanner(System.in);
    System.out.println("请输入状态编号：0、借出\t1、在库");
    String flag = scan.next();
    bookService.getBooksInfoByflag(flag);
  }
}