Spring boot：如何将thymeleaf转换为jsp

Question

我最近学习了一个使用 Spring Boot 的身份验证和授权教程。它工作正常，我想将它集成到我现有的项目中。我遵循的教程是用 thymeleaf 编写的，我当前的项目是用 jsp 编写的。我尝试在线搜索，但它给了我错误。

这是我的代码：

控制器

@RequestMapping(value = { "/","/welcome" }, method = RequestMethod.GET)
public ModelAndView test() {
    ModelAndView model = new ModelAndView("welcomePage");
    model.addObject("title","Welcome");
    model.addObject("message","This is welcome page");
    return model;
}

百里香

<a th:if="${#request.userPrincipal != null}" th:href="@{/logout}">Logout</a>

JSP

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>

<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

    <div>
        <a href="/">Home</a> | &nbsp; 
        <a href="/userInfo">User Info </a> | &nbsp; 
        <a href="/admin">Admin</a> | &nbsp; 

        <c:if test="${pageContext.request.userPrincipal != null}">
            <h2>Logout</h2> 
            <br>
        </c:if>


        ${pageContext.request.userPrincipal}



    </div>

</body>
</html>

pom.xml

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>
    <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>

application.properties

这是我遇到的问题之一。当我尝试运行它时，它给了我这个错误。

/WEB-INF/jsp/_menu.jsp (line: [18], column: [2]) According to TLD or attribute directive in tag file, attribute [test] does not accept any expressions

这是我第一次使用它。希望你能帮助我。非常感谢！！

Answer 1

在你的jsp中使用这个而不是你拥有的：

" "

不带引号