写在前面
最近需要重构一个项目，所以就去研究了关于SpringBoot搭建web的东西。基本的技术栈
-
基础的服务框架 ：
SpringBoot 1.5.2 -
持久层的框架：
MyBatis 3.4+本来使用的是Jpa，写了一会发现会有很多关联查询和分组就改成了MyBatis，之前写了一个Mybatis Geneator代码生成器所以写起来也很快。 -
构建工具
Gradle 3.0 -
前端框架
Angular.js
开始搭建环境
build.gradle 添加相关依赖
buildscript {
ext {
springBootVersion = '1.5.2.RELEASE'
}
repositories {
mavenLocal()
maven { url "http://nexus.chachazhan.com/content/groups/public/" }
mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
}
}
apply plugin: 'java'
apply plugin: 'spring-boot'
apply plugin: 'idea'
jar {
baseName = 'springboot-web-jsp'
version = '0.0.1-SNAPSHOT'
}
sourceCompatibility = 1.8
targetCompatibility = 1.8
repositories {
mavenLocal()
maven { url "http://maven.aliyun.com/nexus/content/groups/public/" }
mavenCentral()
}
dependencies {
compile('org.springframework.boot:spring-boot-starter-web')
testCompile('org.springframework.boot:spring-boot-starter-test')
}
添加相关的类 ，项目结构如下
添加 WebMvcConfig 配置外部静态资源
package com.betterlxc.web.demo.conf;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
/**
* Created by LXC on 2017/3/28.
*/
@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {
/**
* spring-boot配置外部静态资源的方法
*
* @param registry
*/
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
}
}
启动后访问 http://localhost:8080/
报错 信息如下
javax.servlet.ServletException: Could not resolve view with name 'index' in servlet with name 'dispatcherServlet'
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1262) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1037) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
...
在application.properties里已经配置
server.port=8080
spring.mvc.view.prefix=/static/
spring.mvc.view.suffix=.jsp
那么问题来了… 为啥会这样呢 静态资源的访问路径也配置了。 那肯定是视图解析器出了问题，我们来配置一下视图解析器吧
在conf目录下创建一个配置类DefaultConfiguration
package com.betterlxc.web.demo.conf;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.view.JstlView;
import org.springframework.web.servlet.view.UrlBasedViewResolver;
/**
* Created by LXC on 2017/3/28.
*/
@Configuration
public class DefaultConfiguration {
@Bean
public UrlBasedViewResolver setupViewResolver() {
UrlBasedViewResolver resolver = new UrlBasedViewResolver();
resolver.setPrefix("/static/");
resolver.setSuffix(".jsp");
resolver.setCache(true);
resolver.setViewClass(JstlView.class);
return resolver;
}
}
重新 run-bulid
刷新浏览器， 还是报错了但是错误不同。
java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_121]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_121]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_121]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_121]
at org.springframework.web.servlet.support.JstlUtils.exposeLocalizationContext(JstlUtils.java:101) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.view.JstlView.exposeHelpers(JstlView.java:135) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:142) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1282) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1037) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) ~[tomcat-embed-core-8.5.11.jar:8.5.11]
at .....
添加一下 缺少的jar包
compile group: 'javax.servlet', name: 'jstl', version: '1.2'
重新run
再次访问 发现直接下载了 因为浏览器是不认识jsp中的java代码的，jsp是需要先编译成servlet和html。
决定去看一下springboot文档，发现文档中很明确写到了：
JSP limitations
When running a Spring Boot application that uses an embedded servlet container (and is packaged asan executable archive), there are some limitations in the JSP support.
With Tomcat it should work if you use war packaging, i.e. an executable war will work, and will alsobe deployable to a standard container (not limited to, but including Tomcat). An executable jar will notwork because of a hard coded file pattern in Tomcat.
With Jetty it should work if you use war packaging, i.e. an executable war will work, and will also bedeployable to any standard container.
Undertow does not support JSPs.
Creatingacustomerror.jsppagewon’toverridethedefaultviewforerrorhandling,customerror
pages should be used instead. There is a JSP sample so you can see how to set things up.
改动
修改 build.gradle
buildscript {
ext {
springBootVersion = '1.5.2.RELEASE'
}
repositories {
mavenLocal()
maven { url "http://nexus.chachazhan.com/content/groups/public/" }
mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
}
}
apply plugin: 'java'
apply plugin: 'war'
apply plugin: 'spring-boot'
apply plugin: 'idea'
war {
baseName = 'springboot-web-jsp'
version = '0.0.1-SNAPSHOT'
}
sourceCompatibility = 1.8
targetCompatibility = 1.8
repositories {
mavenLocal()
maven { url "http://maven.aliyun.com/nexus/content/groups/public/" }
mavenCentral()
}
dependencies {
compile('org.springframework.boot:spring-boot-starter-web')
compile group: 'javax.servlet', name: 'jstl', version: '1.2'
compile group: 'org.apache.tomcat.embed', name: 'tomcat-embed-jasper', version: '8.5.11'
compile('org.springframework.boot:spring-boot-starter-tomcat')
testCompile('org.springframework.boot:spring-boot-starter-test')
}
WebApplication类 继承 SpringBootServletInitializer
package com.betterlxc.web.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Controller;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
/**
* Created by LXC on 2017/3/28.
*/
@Controller
@EnableWebMvc
@ComponentScan(basePackages = {"com.betterlxc.web.demo.conf", "com.betterlxc.web.demo.mvc.controller"})
@SpringBootApplication
public class WebApplication extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(WebApplication.class, args);
}
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(WebApplication.class);
}
}
使用 war的插件后 目录结构会发生一些变化
SpringBoot其实不推荐使用jsp，可使用其他的模版引擎，例如freemarker ,Beetl
