接受数据的对象1

public class Student<T> {/*** 学号*/private String studentNumber;public String getStudentNumber() {return studentNumber;}public void setStudentNumber(String studentNumber) {this.studentNumber = studentNumber;}public String getStudentName() {return studentName;}public void setStudentName(String studentName) {this.studentName = studentName;}public List<T> getBooks() {return books;}public void setBooks(List<T> books) {this.books = books;}@Overridepublic String toString() {return "Student{" +"studentNumber='" + studentNumber + '\'' +", studentName='" + studentName + '\'' +", books=" + books +'}';}public Student(String studentNumber, String studentName, List<T> books) {this.studentNumber = studentNumber;this.studentName = studentName;this.books = books;}/*** 学生姓名*/private String studentName;private List<T> books;
}

对象1里有list 泛型
因为此时接受的是Book类的数据,所以我转换的时候指定了转换类型为Book类型
接受的其他类型的数据,可以转换的时候指定这个类型就可以了

public class Book {private String bookName;private String price;@Overridepublic String toString() {return "Book{" +"bookName='" + bookName + '\'' +", price='" + price + '\'' +", type='" + type + '\'' +'}';}private String type;public String getBookName() {return bookName;}public void setBookName(String bookName) {this.bookName = bookName;}public String getPrice() {return price;}public void setPrice(String price) {this.price = price;}public String getType() {return type;}public void setType(String type) {this.type = type;}public Book(String bookName, String price, String type) {this.bookName = bookName;this.price = price;this.type = type;}
}

实操代码

  String parse="{\n" +"  \"books\": [\n" +"    {\n" +"      \"bookName\": \"Book 1\",\n" +"      \"price\": \"19.99\",\n" +"      \"type\": \"Fiction\"\n" +"    },\n" +"    {\n" +"      \"bookName\": \"Book 2\",\n" +"      \"price\": \"29.99\",\n" +"      \"type\": \"Non-fiction\"\n" +"    }\n" +"  ],\n" +"  \"studentName\": \"John Doe\",\n" +"  \"studentNumber\": \"123456\"\n" +"}";JSONObject parseObject=JSONObject.parseObject(parse);Student student = JSONObject.parseObject(parse,Student.class);System.out.println(student);List<Book> books = JSONObject.parseArray(parseObject.get("books").toString(), Book.class);student.setBooks(books);System.out.println(student);Student<Book> student1 = JSONObject.parseObject(parse, new TypeReference<Student<Book>>() {});System.out.println(student1);

输出结果

Student{studentNumber='123456', studentName='John Doe', books=[{"price":"19.99","type":"Fiction","bookName":"Book 1"}, {"price":"29.99","type":"Non-fiction","bookName":"Book 2"}]}
Student{studentNumber='123456', studentName='John Doe', books=[Book{bookName='Book 1', price='19.99', type='Fiction'}, Book{bookName='Book 2', price='29.99', type='Non-fiction'}]}
Student{studentNumber='123456', studentName='John Doe', books=[Book{bookName='Book 1', price='19.99', type='Fiction'}, Book{bookName='Book 2', price='29.99', type='Non-fiction'}]}

TypeReference是在运行时指定要转换的类型包括泛型

fastjson的版本

<dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.76</version>
</dependency>

从而实现指定泛型的类型就可以转换;提高复用性