找到但未呈现Spring Boot 2.1.x JSP文件

我目前正在将一个小型应用程序迁移到SpringBoot。我们有旧版代码，我希望通过将登录页面连接到SpringBoot中，可以让Web应用程序的JSP / JS文件处理其余部分。

目前，我已经成功地将我们升级到Spring 5，并使用SpringBoot 2.1.8。

POM片段：该应用程序使用的是Spring提供的Tomcat默认值，并且引入了相关的Jasper / JSTL JARS，以便Tomcat可以读取

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-activemq</artifactId>
        <exclusions>
            <exclusion>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-classic</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <exclusions>
            <exclusion>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-classic</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jdbc</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</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-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>

根据此DZone文章，我构建了一个小型控制器来处理登录过程

@Controller public class LoginController {

@Resource
private UserSessionService userSessionService;

@GetMapping(value = "/")
public String index() {
    Logger.getLogger(this.getClass().getName()).log(Level.SEVERE, "LoginController: Hit /, returning index.jsp");
    return "index";
}

@GetMapping(value = "/login")
public String login() {
    Logger.getLogger(this.getClass().getName())
          .log(Level.SEVERE, "LoginController: Hit /login, returning login.jsp");
    return "login";
}

@GetMapping(value = "/loginFailed")
public String loginError(Model model) {
    Logger.getLogger(this.getClass().getName()).log(Level.SEVERE, "LoginController: Failed to login");
    model.addAttribute("error", "true");
    return "login";
}

@GetMapping(value = "/logout")
public String logout(SessionStatus session) {
    Logger.getLogger(this.getClass().getName()).log(Level.SEVERE, "LoginController: Logging out");
    SecurityContextHolder.getContext().setAuthentication(null);
    session.setComplete();
    return "redirect:/login";
}

@PostMapping(value = "/postLogin")
public String postLogin(Model model, HttpSession session) {
    Logger.getLogger(this.getClass().getName()).log(Level.SEVERE, "LoginController: postLogin");
    return "redirect:/";
}

} login.jsp：旧版代码，已修改以调用控制器。我正在尽最大努力让Spring Security处理调用AuthenticaionProvider和DB的过程（为简洁起见，我仅显示关键区域内容，无论如何该页面都非常简单

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ taglib prefix="security" uri="http://www.springframework.org/security/tags" %> <c:set var="contextPath" value="${pageContext.request.contextPath}"/>

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <c:set var="contextPath" value="${pageContext.request.contextPath}"/> <%@include file="beforeHtml.jsp" %>

Release Notes

我有一个名为SecurityConfig的文件，让SpringBoot知道绕过“默认”登录页面：

@Configuration public class SecurityConfig extends WebSecurityConfigurerAdapter {

@Override
protected void configure(HttpSecurity http) throws Exception {
    http
            .authorizeRequests().antMatchers("/xxx").hasAnyRole("ADMIN", "USER")
            .and()
            .authorizeRequests().antMatchers("/login", "/resource/**").permitAll()
            .and()
            .formLogin().loginPage("/login").usernameParameter("username").passwordParameter("password").permitAll()
            .loginProcessingUrl("/doLogin")
            .successForwardUrl("/postLogin")
            .failureUrl("/loginFailed")
            .and()
            .logout().logoutUrl("/doLogout").logoutSuccessUrl("/logout").permitAll()
            .and()
            .csrf().disable();
}

我的application.properties文件中有这些字段

server.port=8888 server.servlet.context-path=/xxx server.tomcat.additional-tld-skip-patterns=mchange-commons-java.jar

spring.mvc.view.prefix=/WEB-INF/view/jsp/ spring.mvc.view.suffix=.jsp spring.mvc.servlet.load-on-startup=1 所有这些加在一起，使我可以按要求的URL登录localhost:8888/xxx/login就可以了，然后登录并观看Spring发现我的设置并登录的日志。问题在于何时要获取名为的JSP文件的登录页面index.jsp。根据SpringBoot / Application的记录

Oct 09, 2019 2:44:37 PM org.springframework.core.log.LogFormatUtils traceDebug FINE: GET "/xxx/login", parameters={} Oct 09, 2019 2:44:37 PM org.springframework.web.servlet.handler.AbstractHandlerMapping getHandler FINE: Mapped to public java.lang.String com.rhdjapan.xxx.controllers.LoginController.login() Oct 09, 2019 2:44:37 PM com.xx.xxx.controllers.LoginController login SEVERE: LoginController: Hit /login, returning login.jsp Oct 09, 2019 2:44:37 PM org.springframework.web.servlet.view.ContentNegotiatingViewResolver getBestView FINE: Selected 'text/html' given [text/html,...] Oct 09, 2019 2:44:37 PM org.springframework.web.servlet.view.AbstractView render FINE: View name 'login', model {} Oct 09, 2019 2:44:37 PM org.springframework.web.servlet.view.InternalResourceView renderMergedOutputModel FINE: Forwarding to [/WEB-INF/view/jsp/login.jsp] Oct 09, 2019 2:44:38 PM org.springframework.web.servlet.FrameworkServlet logResult FINE: Completed 200 OK Oct 09, 2019 2:44:42 PM com.xx.xxx.services.common.security.service.UserDetailsServiceImpl loadUserByUsername SEVERE: loadUserByUsername: looking up user [admin] Oct 09, 2019 2:44:42 PM com.xx.xxx.services.common.security.service.UserDetailsServiceImpl loadUserByUsername SEVERE: loadUserByUsername: userId found = [1111111] Oct 09, 2019 2:44:42 PM org.springframework.core.log.LogFormatUtils traceDebug FINE: "FORWARD" dispatch for POST "/xxx/postLogin", parameters={username:[admin], password:[admin]} Oct 09, 2019 2:44:42 PM org.springframework.web.servlet.handler.AbstractHandlerMapping getHandler FINE: Mapped to public java.lang.String com.xx.xxx.controllers.LoginController.postLogin(org.springframework.ui.Model,javax.servlet.http.HttpSession) Oct 09, 2019 2:44:42 PM com.xx.xxx.controllers.LoginController postLogin SEVERE: LoginController: postLogin Oct 09, 2019 2:44:42 PM org.springframework.web.servlet.view.AbstractView render FINE: View name 'redirect:', model {} Oct 09, 2019 2:44:42 PM org.springframework.web.servlet.FrameworkServlet logResult FINE: Exiting from "FORWARD" dispatch, status 302 Oct 09, 2019 2:44:42 PM org.springframework.core.log.LogFormatUtils traceDebug FINE: GET "/xxx/", parameters={} Oct 09, 2019 2:44:42 PM org.springframework.web.servlet.handler.AbstractHandlerMapping getHandler FINE: Mapped to public java.lang.String com.xx.xxx.controllers.LoginController.index() Oct 09, 2019 2:44:42 PM com.xx.xxx.controllers.LoginController index SEVERE: LoginController: Hit /, returning index.jsp Oct 09, 2019 2:44:42 PM org.springframework.web.servlet.view.ContentNegotiatingViewResolver getBestView FINE: Selected 'text/html' given [text/html, ...] Oct 09, 2019 2:44:42 PM org.springframework.web.servlet.view.AbstractView render FINE: View name 'index', model {} Oct 09, 2019 2:44:42 PM org.springframework.web.servlet.view.InternalResourceView renderMergedOutputModel FINE: Forwarding to [/WEB-INF/view/jsp/index.jsp] Oct 09, 2019 2:44:42 PM org.springframework.web.servlet.FrameworkServlet logResult FINE: Completed 200 OK

这就是问题所在：成功找到JSP文件时，不会呈现页面。我返回了一个空的HTML文件，使用Web调试器（chrome）仅显示15个空白行的来源。我认为它是我index.jsp文件的长度；

我的问题是双重的

HTML / JSP无法在屏幕上呈现的原因可能是什么？ 如果有修复，对于我在SpringBoot下需要工作的所有其他旧版JSP文件，它们是否都需要类似的过程？

更新 为简洁起见，有人问起我制作的WAR的结构，当我拉起档案时，结构就是这样

WAR |____css |____dashboard_view |____excel |____images |____jquery |____js |____jsp |____META-INF |____org |____third-party |____WEB-INF |________classes |________lib |________view |____________html |____________jsp |_________________index.jsp |_________________login.jsp 考虑到我提供的登录和索引jsp文件，我想知道在渲染过程中某个地方是失败了吗？