使用所学Spring知识，实现简易的图书查询系统功能。实现查询全部图书。 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。
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);
}
}
本文来自博客园，作者：明金同学，转载请注明原文链接：https://www.cnblogs.com/vmuu/p/15663305.html
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