12.16 POJO 自动封装对象
POJO即自定义类型
如果我们请求参数是一个POJO 那么SpringMVC会自动为这个POJO赋值
首先我们有一个book，里面封装一个自定义的Address（内有city province）
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| package com.runsstudio.springmvc.servlet;
public class Book {
private String bookName;
private String author;
private Double price;
private Integer stock;
private Integer sales;
private Address address;
public String getBookName() {
return bookName;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
public void setBookName(String bookName) {
this.bookName = bookName;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public Double getPrice() {
return price;
}
public void setPrice(Double price) {
this.price = price;
}
public Integer getStock() {
return stock;
}
public void setStock(Integer stock) {
this.stock = stock;
}
public Integer getSales() {
return sales;
}
public void setSales(Integer sales) {
this.sales = sales;
}
@Override
public String toString() {
return "Book{" +
"bookName='" + bookName + '\'' +
", author='" + author + '\'' +
", price=" + price +
", stock=" + stock +
", sales=" + sales +
", address=" + address +
'}';
}
public Book(String bookName, String author, Double price, Integer stock, Integer sales, Address address) {
this.bookName = bookName;
this.author = author;
this.price = price;
this.stock = stock;
this.sales = sales;
this.address = address;
}
public Book() {
}
}
|
然后我们有一个Controller
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| @Controller
public class BookController {
@RequestMapping("/book")
public String addBook(Book book, Model model){
model.addAttribute("book",book);
return "addSuccess";
}
}
|
jsp里写个表单
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| <form action="${pageContext.request.contextPath}/book" method="post">
书名<input type="text" name="bookName"><br>
作者<input type="text" name="author"><br>
价格<input type="text" name="price"><br>
库存<input type="text" name="stock"><br>
销量<input type="text" name="sales"><br>
地址：省份<input type="text" name="address.province">城市<input type="text" name="address.city"><br>
<input type="submit" value="提交图书">
</form>
|
提交表单
成功返回的页面
注意：参数是区分大小写的 不能写bookname
参数类型如果不对应 比如把Double 输入了个String 会返回400 Bad Request
