我刚刚开始学习spring,我在我的项目中添加了一个jsp文件,但控制器无法映射到它。我的控制器位于 src --> main --> java --> com.example.todo -->controller --> UserController.java 我的 jsp 文件位于 src --> main --> resources --> WEB-INF --> jsp --> index.jsp。 我正在关注一个视频,其中该人将 jsp 文件添加到 spring 项目,并且控制器映射它。但就我而言,它没有这样做。
这是我的代码-
TodoApplication.java
package com.example.todo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class TodoApplication {
public static void main(String[] args) {
SpringApplication.run(TodoApplication.class, args);
}
}
UserController.java
package com.example.todo.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
@Controller
public class UserController {
@GetMapping("/index")
public String ind(){
return "index";
}
@GetMapping("/index-html")
@ResponseBody
public String indexHTML(){
StringBuilder body = new StringBuilder();
body.append("<!DOCTYPE html>");
body.append("<html>");
body.append("<body>");
body.append("<h1>HTML page</h1>");
body.append("<p>This is a random text</p>");
body.append("</body>");
body.append("</html>");
return body.toString();
}
}
index.jsp
<!DOCTYPE html>
<html>
<body>
<h1 style="color: blue;">This is jsp file</h1>
</body>
</html>
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>3.1.0</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>todo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>todo</name>
<description>A To-Do list application</description>
<properties>
<java.version>19</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
应用程序属性
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp
spring.datasource.url=jdbc:h2:mem:db
我在 Ubuntu 22.04 上使用 IntelliJ IDEA Community 以及 JDK 19 和 spring 3.1。当我转到 localhost:8080/index-html 时,它会呈现 html 代码并按预期执行,但当我转到 localhost:8080/index 时,情况并非如此。
我还对 application.properties 进行了更改,添加了前缀和后缀,并添加了 tomcat-jasper 依赖项。
请帮忙。如果您能提供一个很好的学习 Spring Boot 的在线资源,我们也会很高兴。
更好地检查创建的jsp是否位于正确的路径下
您可以从HowTodoInJava
了解Spring Boot