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@@ -4351,6 +4351,8 @@ src/main/webapp/WEB-INF/web.xml
###### ajax提交
+> 略
+
##### 控制器接收前端提交的数据
@@ -4371,7 +4373,6 @@ import org.springframework.web.bind.annotation.RequestParam;
@Controller
@RequestMapping("/user")
public class UserController {
-
@RequestMapping("/add")
public void addUser(@RequestParam("bookName") String bookName, @RequestParam("author") String author, @RequestParam("price") String price) {
System.out.println(bookName);
@@ -4381,6 +4382,109 @@ public class UserController {
}
```
+测试
+
+
+
+
+
+>**[注意]**
+>
+>1.如果控制器方法中接收数据的参数名与请求过来的参数名称一致，则 `@RequestParam("")` 注解可以省略
+>
+>如上述例子中的
+>
+>```java
+>public void addUser(@RequestParam("bookName") String bookName, @RequestParam("author") String author, @RequestParam("price") String price)
+>```
+>
+>就可以写为
+>
+>```java
+>public void addUser(String bookName, String author, String price)
+>```
+>
+>2.当页面传递过来的参数名称与实体类的属性名一一对应，那么控制器方法可以直接通过对象接收
+>
+>例如：
+>
+>src/main/java/org/example/web/UserController.java
+>
+>```java
+> @RequestMapping("/add")
+> public void addUser(Book book) {
+> System.out.println(book.getBookName());
+> System.out.println(book.getAuthor());
+> System.out.println(book.getPrice());
+> }
+>```
+>
+>src/main/java/org/example/entity/Book.java
+>
+>```java
+>public class Book {
+> private int bookId;
+> private String bookName;
+> private String author;
+> private double price;
+> // ... 此处省略 Getter 和 Setter
+>}
+>```
+>
+>测试结果相同
+
+
+
+##### 控制器响应前端请求
+
+> form表单/超链接请求跳转页面
+
+src/main/webapp/index.jsp
+
+```html
+
+ 提交
+
+```
+
+src/main/webapp/success.jsp
+
+```html
+
+ 成功页面
+
+```
+
+###### 转发
+
+src/main/java/org/example/web/UserController.java
+
+```java
+@RequestMapping("/add")
+public String addUser(Book book) {
+ return "/success.jsp"; // 转发
+}
+```
+
+
+
+
+
+###### 重定向
+
+src/main/java/org/example/web/UserController.java
+
+```java
+@RequestMapping("/add")
+public String addUser(Book book) {
+ return "redirect:/success.jsp"; // 重定向
+}
+```
+
+
+
+
+
#### Thymeleaf