How to implement jsp page jump in java

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@Controller annotations

1. Configuration in the application.properties file

# 配置jsp文件的位置，默认位置为：src/main/webapp
spring.mvc.view.prefix=/pages/
# 配置jsp文件的后缀
spring.mvc.view.suffix=.jsp

2. Configuration in the Controller file

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
@Controller
public class UserController {

  @RequestMapping(value = "/index",method = RequestMethod.GET)
  public String toIndex(){
    return "index";
  }
}

3. Start the [main] method in the project App.Java

4. Access the url and access the jsp page: localhost:8080/index

@RestController annotation

1. Configuration in the application.properties file

# 配置jsp文件的位置，默认位置为：src/main/webapp
spring.mvc.view.prefix=/pages/
# 配置jsp文件的后缀
spring.mvc.view.suffix=.jsp

2. Configuration in the RestController file

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.RestController;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
@RestController
public class UserController {

  @RequestMapping(value = "/index",method = RequestMethod.GET)
  public String toIndex(){
    ModelAndView mv = new ModelAndView("index");     
 return mv;  
  }
}

3. Start the [main] method in the project App.java to start

4. Access the url and access the jsp page: localhost:8080/index

Note: application.properties The properties in spring.mvc.view.prefix and spring.mvc.view.prefix are different in the old version of spring-boot and in the new version:
Used in the old version:

spring.view.prefix=/pages/ 
spring.view.suffix=.jsp

Used in the new version:

spring.mvc.view.prefix=/pages/
spring.mvc.view.suffix=.jsp

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