使用Spring Boot创建Spring MVC项目,访问url请求出现问题:Circular view path
1、问题描述
控制台打印:
javax.servlet.ServletException: Circular view path [greeting]: would dispatch back to the current handler URL [/greeting] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)
浏览器访问:
2、项目代码
(1)Spring MVC的controller
1 package com.hello.web; 2 3 import org.springframework.stereotype.Controller; 4 import org.springframework.ui.Model; 5 import org.springframework.web.bind.annotation.RequestMapping; 6 import org.springframework.web.bind.annotation.RequestParam; 7 8 @Controller 9 public class GreetingController { 10 @RequestMapping("/greeting") 11 public String greeting(@RequestParam(value="name",required=false,defaultValue="World")String name, Model model) { 12 model.addAttribute("name", name); 13 return "greeting"; 14 } 15 }
(2)页面代码
使用 thymeleaf模板框架,负责服务端渲染html页面
1 <!DOCTYPE html> 2 <html xmlns:th="http://www.thymeleaf.org"> 3 <head> 4 <title>Spring Boot thymeleaf 应用</title> 5 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> 6 </head> 7 <body> 8 <p th:text="'hello, '+${name}+'!'" /> 9 </body> 10 </html>
3、解决方法
在 项目的 pom.xml中添加 thymeleaf 的 spring boot starter
1 <dependency> 2 <groupId>org.springframework.boot</groupId> 3 <artifactId>spring-boot-starter-thymeleaf</artifactId> 4 </dependency>
4、问题解决
再次通过浏览器地址栏,访问: http://localhost:8080/greeting?name=zhangsan
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