问题描述
限时送ChatGPT账号..我有一个包含嵌入式 Tomcat 的工作 Spring 应用程序.作为一个可执行的战争,它工作正常.由于我将在前端使用 AngularJ,因此将 Spring 项目放在可执行 jar 中并不是很实用,因为我将在浏览器中进行调试,并希望能够快速编辑 js 源文件.如果它们保存在存档中,这很烦人.
这就是我想让它可部署的原因,这样它就可以在 tomcat 上解压.这似乎很容易,但我无法让它发挥作用.
上下文显然总是被加载两次.因此,首先我得到了我使用的存储库 (@Repository
) 的异常(已被阻止)和 spring 的另一个异常无法初始化上下文,因为已经存在根应用程序上下文".>
我已经读过感到困惑,Spring 创建 2 个上下文是很正常的,尤其是使用 MVC.但是为什么会有例外呢?
我的 SpringApp 类看起来像这样
@EnableWebMvc@ComponentScan@EnableAutoConfiguration公共类 LAuthServerApplication 扩展了 WebMvcConfigurerAdapter {@自动连线环境环境;公共静态无效主(字符串 [] args){System.out.println("###################启动参数###############启动参数###############for (String s : args) {System.out.println("参数:" + s);}System.out.println("###################################################");SpringApplication.run(LAuthServerApplication.class, args);}@覆盖public void configureDefaultServletHandling(DefaultServletHandlerConfigurer 配置器) {配置器.启用();}@豆角,扁豆public InternalResourceViewResolver viewResolver() {InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();viewResolver.setPrefix("/WEB-INF/pages/");viewResolver.setSuffix(".jsp");返回视图解析器;}
为了使其可部署,我将这个类添加到我的项目中:
@Configuration公共类 AppServletInitializer 扩展 SpringBootServletInitializer {@覆盖受保护的 SpringApplicationBuilder 配置(SpringApplicationBuilder 应用程序){返回 application.sources(Application.class);}}
POM:
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache/POM/4.0.0" xmlns:xsi="http://www.w3/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache/POM/4.0.0 http://maven.apache/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>chlabweb</groupId><artifactId>LAuth</artifactId><version>1.0.0</version><包装>战争</包装><属性><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><mavenpiler.source>1.8</mavenpiler.source><mavenpiler.target>1.8</mavenpiler.target></属性><父母><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.3.5.RELEASE</version></父母><依赖项><依赖><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></依赖><依赖><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-tomcat</artifactId><范围>提供</范围></依赖><依赖><groupId>org.apache.tomcat.embed</groupId><artifactId>tomcat-embed-jasper</artifactId><范围>提供</范围></依赖><依赖><groupId>javax.servlet</groupId><artifactId>jstl</artifactId></依赖><依赖><groupId>org.springframework.security</groupId><artifactId>spring-security-web</artifactId></依赖><依赖><groupId>org.springframework.security</groupId><artifactId>spring-security-config</artifactId></依赖><依赖><groupId>chlabweb</groupId><artifactId>基础设施</artifactId><version>1.2.6</version></依赖></依赖项><构建><插件><插件><groupId>org.apache.maven.plugins</groupId><artifactId>maven-war-plugin</artifactId><version>2.6</version><配置><网络资源><资源><目录>src/main/webapp</directory><filtering>true</filtering></资源></webResources></配置></插件><插件><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><配置><资源><资源><filtering>true</filtering><目录>src/main/resources/</directory></资源></资源></配置></插件></plugins></build><存储库><存储库><id>spring-releases</id><url>https://repo.spring.io/libs-release</url></repository></repositories><插件库><插件库><id>spring-releases</id><url>https://repo.spring.io/libs-release</url></pluginRepository></pluginRepositories><name>LAuth</name></项目>
解决方案 我终于让它运行了,具有以下 POM 和 M.Denium 和 Dhanabalan 的建议代码更改:
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache/POM/4.0.0" xmlns:xsi="http://www.w3/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache/POM/4.0.0 http://maven.apache/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>chlabweb</groupId><artifactId>LAuth</artifactId><version>1.0.0</version><包装>战争</包装><属性><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><mavenpiler.source>1.8</mavenpiler.source><mavenpiler.target>1.8</mavenpiler.target></属性><父母><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.3.5.RELEASE</version></父母><依赖项><依赖><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><排除事项><排除><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-tomcat</artifactId></排除></排除项></依赖><依赖><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-tomcat</artifactId><范围>提供</范围></依赖><依赖><groupId>org.apache.tomcat.embed</groupId><artifactId>tomcat-embed-el</artifactId><范围>提供</范围></依赖><依赖><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></依赖><依赖><groupId>org.springframework.security</groupId><artifactId>spring-security-web</artifactId></依赖><依赖><groupId>org.springframework.security</groupId><artifactId>spring-security-config</artifactId></依赖><依赖><groupId>chlabweb</groupId><artifactId>基础设施</artifactId><version>1.2.6</version></依赖></依赖项><构建><插件><插件><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><配置><资源><资源><filtering>true</filtering><目录>src/main/resources/</directory></资源></资源></配置></插件></plugins></build><存储库><存储库><id>spring-releases</id><url>https://repo.spring.io/libs-release</url></repository></repositories><插件库><插件库><id>spring-releases</id><url>https://repo.spring.io/libs-release</url></pluginRepository></pluginRepositories><name>LAuth</name>
I have a working Spring application that contains a embedded Tomcat. As a executable war, it works fine. As I'm going to use AngularJ for the front end, it isn't very practical to have the Spring project in an executable jar, as I will do debugging in the browser and want to be able to quickly edit the js source files. If they are saved in an archive, this is annoying.
That's why I want to make it deployable, so it would get unpacked on a tomcat. It seems to be that easy, but I can't get it to work.
The context always gets loaded twice apparently. Because of that first I get an exception of the repository (@Repository
) I use (already blocked) and another exception from spring "Cannot initialize context because there is already a root application context present".
I confused as I already read, that is quite normal that Spring creates 2 contexts, especially with MVC. But why the exceptions then?
My SpringApp class looks like this
@EnableWebMvc
@ComponentScan
@EnableAutoConfiguration
public class LAuthServerApplication extends WebMvcConfigurerAdapter {
@Autowired
Environment env;
public static void main(String[] args) {
System.out.println("#################### Startup parameters ##############");
for (String s : args) {
System.out.println("Parameter: " + s);
}
System.out.println("######################################################");
SpringApplication.run(LAuthServerApplication.class, args);
}
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
@Bean
public InternalResourceViewResolver viewResolver() {
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setPrefix("/WEB-INF/pages/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
To make it deployable I added this class to my project:
@Configuration
public class AppServletInitializer extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(Application.class);
}
}
POM:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache/POM/4.0.0" xmlns:xsi="http://www.w3/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache/POM/4.0.0 http://maven.apache/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>chlabweb</groupId>
<artifactId>LAuth</artifactId>
<version>1.0.0</version>
<packaging>war</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<mavenpiler.source>1.8</mavenpiler.source>
<mavenpiler.target>1.8</mavenpiler.target>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.5.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</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>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
</dependency>
<dependency>
<groupId>chlabweb</groupId>
<artifactId>Infrastructure</artifactId>
<version>1.2.6</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.6</version>
<configuration>
<webResources>
<resource>
<directory>src/main/webapp</directory>
<filtering>true</filtering>
</resource>
</webResources>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<resources>
<resource>
<filtering>true</filtering>
<directory>src/main/resources/</directory>
</resource>
</resources>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<url>https://repo.spring.io/libs-release</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<url>https://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
<name>LAuth</name>
</project>
解决方案
I finally got it to run, with the following POM and the suggested Code change from M.Denium and Dhanabalan:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache/POM/4.0.0" xmlns:xsi="http://www.w3/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache/POM/4.0.0 http://maven.apache/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>chlabweb</groupId>
<artifactId>LAuth</artifactId>
<version>1.0.0</version>
<packaging>war</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<mavenpiler.source>1.8</mavenpiler.source>
<mavenpiler.target>1.8</mavenpiler.target>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.5.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</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-el</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
</dependency>
<dependency>
<groupId>chlabweb</groupId>
<artifactId>Infrastructure</artifactId>
<version>1.2.6</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<resources>
<resource>
<filtering>true</filtering>
<directory>src/main/resources/</directory>
</resource>
</resources>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<url>https://repo.spring.io/libs-release</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<url>https://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
<name>LAuth</name>
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