如何在浏览器中正确显示JSP文件?

Question

我正在遵循有JSP文件的文章，我正在努力在浏览器中正确显示它们。

在我的项目中，我有LoginController类:

@Controller
@RequestMapping("/api/page")
public class LoginController {
@GetMapping("/welcomePage")
public ModelAndView welcomePage() {
ModelAndView model = new ModelAndView();
model.setViewName("welcomePage");
return model;
}
/*
* Updated homePage.jsp file to provide User and Admin Roles specific activities.
* homePage.jsp
*/
@GetMapping("/homePage")
public ModelAndView homePage() {
ModelAndView model = new ModelAndView();
model.setViewName("homePage");
return model;
}
/*
* '/userPage' is used by USER Role to access and perform Normal user activities.
*/
@GetMapping("/userPage")
public ModelAndView userPage() {
ModelAndView model = new ModelAndView();
model.setViewName("userPage");
return model;
}
/*
* '/adminPage' is used by ADMIN Role to access and perform Admin user activities.
* ADMIN role can access “/userPage” URL too.
*/
@GetMapping("/adminPage")
public ModelAndView adminPage() {
ModelAndView model = new ModelAndView();
model.setViewName("adminPage");
return model;
}
@GetMapping("/loginPage")
public ModelAndView loginPage(@RequestParam(value = "error",required = false) String error,
@RequestParam(value = "logout",   required = false) String logout) {
ModelAndView model = new ModelAndView();
if (error != null) {
model.addObject("error", "Invalid Credentials provided.");
}
if (logout != null) {
model.addObject("message", "Logged out from successfully.");
}
model.setViewName("loginPage");
return model;
}
}

我也有一些JSP文件，这些文件位于/WEB-INF/view内部，如本&这个答案:

adminPage.jsp:

<%@taglib prefix="c" uri="https://java.sun.com/jsp/jstl/core"%>
<h3>Admin Page</h3>
<c:url value="/logout" var="logoutUrl" />
<form id="logout" action="${logoutUrl}" method="post" >
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}" />
</form>
<c:if test="${pageContext.request.userPrincipal.name != null}">
<a href="javascript:document.getElementById('logout').submit()">Logout</a>
</c:if>

homePage.jsp

<%@taglib prefix="c" uri="https://java.sun.com/jsp/jstl/core"%>
<a href="${pageContext.request.contextPath}/userPage">User</a> | <a href="${pageContext.request.contextPath}/adminPage">Admin</a> | <a href="javascript:document.getElementById('logout').submit()">Logout</a>
<h3>Welcome to Rest API Application</h3>
<ul>
<li>Java 8 tutorial</li>
<li>Spring tutorial</li>
<li>Gradle tutorial</li>
<li>BigData tutorial</li>
</ul>
<c:url value="/logout" var="logoutUrl" />
<form id="logout" action="${logoutUrl}" method="post" >
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}" />
</form>

loginPage.jsp

<%@ include file="welcomePage.html" %>
<hr/>
<h3>Login Form</h3>
<%
String profile_msg = (String) request.getAttribute("profile_msg");
if (profile_msg != null) {
out.print(profile_msg);
}
String login_msg = (String) request.getAttribute("login_msg");
if (login_msg != null) {
out.print(login_msg);
}
%>
<br/>
<form action="loginPage.jsp" method="post">
Email:<input type="text" name="email"/><br/><br/>
Password:<input type="password" name="password"/><br/><br/>
<input type="submit" value="login"/>"
</form>

userPage.jsp

<%@taglib prefix="c" uri="https://java.sun.com/jsp/jstl/core"%>
<h3>User Page</h3>
<c:url value="/logout" var="logoutUrl" />
<form id="logout" action="${logoutUrl}" method="post" >
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}" />
</form>
<c:if test="${pageContext.request.userPrincipal.name != null}">
<a href="javascript:document.getElementById('logout').submit()">Logout</a>
</c:if>

在我的应用程序中，我有application.properties配置为:

spring.mvc.view.prefix=/webapp/WEB-INF/view/
spring.mvc.view.suffix=.jsp

但是我总是得到错误:

Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Mon Dec 19 20:54:05 CET 2022
There was an unexpected error (type=Internal Server Error, status=500).

MyPOMfile contains:

<dependencies>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-boot-starter</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
<version>2.3.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>2.4.4</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</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-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.5</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
<scope>provided</scope>
</dependency>
<!--<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-springsecurity5</artifactId>
</dependency>-->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>jakarta.servlet.jsp.jstl</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.2</version>
<configuration>
<includes>
<include>**/*.java</include>
</includes>
</configuration>
</plugin>
</plugins>
</build>

有人能告诉，请，我错过了一些东西，我需要添加什么来正确地在浏览器中显示它们?它会不会与Spring安全配置混淆?

我的当前日志。

我可以提供更多的信息，如果它有助于发现问题的原因。

提前感谢你的好主意。

Answer 1

的方法是:

我把所有的JSP文件而不是/webapp/WEB-INF/view/目录放到/resources/templates/jsp/.

并在application.properties内添加

spring.mvc.view.prefix=/WEB-INF/view/
spring.mvc.view.suffix=.jsp

另一个路径:

spring.thymeleaf.prefix=classpath:/templates/jsp/
spring.thymeleaf.suffix=.jsp

它开始为我工作了。

还要注意，如果您在POM中设置了所有重要的依赖项，如:

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>