JAVA写在包xhu.soft中定义一个教材类，包含编号、书名、作者、出版社和价格等属性，要求能用构造方法初始化图书 信息；同时能修改图书的各信息。然后在包xhu.test包中编写图书的测试类，输出图书信息。

首先，在`xhu.soft`包中定义一个`Book`类，用于表示教材：

package xhu.soft;

public class Book {
    private String bookId;
    private String title;
    private String author;
    private String publisher;
    private double price;

    // 构造方法，初始化图书信息
    public Book(String bookId, String title, String author, String publisher, double price) {
        this.bookId = bookId;
        this.title = title;
        this.author = author;
        this.publisher = publisher;
        this.price = price;
    }

    // 提供getter和setter方法，以便修改图书信息
    public String getBookId() { return bookId; }
    public void setBookId(String bookId) { this.bookId = bookId; }

    public String getTitle() { return title; }
    public void setTitle(String title) { this.title = title; }

    public String getAuthor() { return author; }
    public void setAuthor(String author) { this.author = author; }

    public String getPublisher() { return publisher; }
    public void setPublisher(String publisher) { this.publisher = publisher; }

    public double getPrice() { return price; }
    public void setPrice(double price) { this.price = price; }
}

接下来，在`xhu.test`包中编写一个`BookTest`类，用于测试图书信息：

package xhu.test;

import xhu.soft.Book;

public class BookTest {
    public static void main(String[] args) {
        // 创建一个新的Book对象并初始化信息
        Book book1 = new Book("B001", "Java Programming", "John Doe", "XYZ Publishers", 49.99);

        // 输出初始图书信息
        System.out.println("Book Information:");
        System.out.println("ID: " + book1.getBookId());
        System.out.println("Title: " + book1.getTitle());
        System.out.println("Author: " + book1.getAuthor());
        System.out.println("Publisher: " + book1.getPublisher());
        System.out.println("Price: " + book1.getPrice());

        // 修改图书信息并再次输出
        book1.setTitle("Advanced Java");
        book1.setPrice(59.99);
        System.out.println("\nModified Book Information:");
        System.out.println("ID: " + book1.getBookId());
        System.out.println("Title: " + book1.getTitle());
        System.out.println("Author: " + book1.getAuthor());
        System.out.println("Publisher: " + book1.getPublisher());
        System.out.println("Price: " + book1.getPrice());
    }
}

当你运行`BookTest`类，它会显示原始的和修改后的图书信息。