Spring MVC – Code ví dụ Spring MVC Page Redirect, chuyển tiếp trang
Page Redirection
Trong các ví dụ trước chúng ta thường dùng link, form để gọi 1 controller sau đó controller trả về view, đây là 1 flow đơn giản trong Spring MVC.
Nhiều trường hợp controller nhận request nhưng nó không trả về view mà gửi request tới 1 controller khác để thực hiện request – page redirection
Ví dụ:
Thư viện sử dụng:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>stackjava.com</groupId>
<artifactId>SpringRedirect</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<spring.version>5.0.2.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
</dependencies>
</project>
Spring Config:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<context:component-scan base-package="stackjava.com.springmvchello" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/views/jsp/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<display-name>SpringRedirect</display-name>
<servlet>
<servlet-name>spring-mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring-mvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
Controller:
method redirect()không trả về view mà thực hiện redirect sang url “/page2” bằng cách thêm từ “redirect” trước kết quả trả về.
Bạn cũng có thể thực hiện redirect bằng cách return new RedirectView("page2"); thay vì "redirect:page2";
package stackjava.com.springmvchello.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class BaseController {
@RequestMapping("/")
public String page1() {
return "page1";
}
@RequestMapping("/redirect")
public String redirect() {
return "redirect:page2";
}
// @RequestMapping("/redirect")
// public RedirectView redirect() {
// return new RedirectView("page2");
// }
@RequestMapping("/page2")
public String page2() {
return "page2";
}
}
File view:
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html>
<head>
<title>Spring MVC Redirect</title>
</head>
<body>
<h2>Page1</h2>
<form:form method="POST" action="redirect">
<input type="submit" value="Redirect" />
</form:form>
</body>
</html>
<html> <head> <title>Spring MVC Redirect</title> </head> <body> <h2>Page2</h2> </body> </html>
Demo:
button Redirection ở page1 gọi tới controller redirect, controller redirect lại chuyển request tới controller page2, controller page2 trả về trang page2.jsp
Spring MVC – Code ví dụ Spring MVC Page Redirect, chuyển tiếp trang
Okay, Done!
Download code ví dụ trên tại đây
References: