maven插件spring-boot-starter-tomcat的使用方式

更新時間：2022年07月08日 14:41:10 作者：金霖海

這篇文章主要介紹了maven插件spring-boot-starter-tomcat的使用方式，具有很好的參考價值，希望對大家有所幫助。如有錯誤或未考慮完全的地方，望不吝賜教

tomcat內嵌到web項目中

將tomcat 內嵌到 web項目中，這樣可以直接運行 webapp項目。

不需要再部署到額外的tomcat，直接就可以運行了。

1.pom.xml 配置

    <plugins>
      <plugin>
		    <groupId>org.springframework.boot</groupId>
		    <artifactId>spring-boot-starter-tomcat</artifactId>
		    <version>2.3.0.RELEASE</version>
       </plugin>
    
    </plugins>

2.tomcat使用maven內嵌入到web項目需要jdk運行環(huán)境

eclipse默認的運行環(huán)境式jre，我們需要改成jdk

問題解決：

3.springmvc依賴

Spring V4.1以后的版本運行時會報如下錯誤：

NoSuchMethodError: javax.servlet.http.HttpServletResponse.getStatus()

我們使用Spring V4.1以前的版本運行，依賴如下

<dependency>
	    <groupId>org.springframework</groupId>
	    <artifactId>spring-webmvc</artifactId>
	    <version>4.0.1.RELEASE</version>
</dependency>

導入對象轉json的依賴

<dependency>
	    <groupId>com.fasterxml.jackson.core</groupId>
	    <artifactId>jackson-annotations</artifactId>
	    <version>2.9.5</version>
	</dependency>
	
	<dependency>
	    <groupId>com.fasterxml.jackson.core</groupId>
	    <artifactId>jackson-core</artifactId>
	    <version>2.9.5</version>
	</dependency>
	
	<dependency>
	    <groupId>com.fasterxml.jackson.core</groupId>
	    <artifactId>jackson-databind</artifactId>
	    <version>2.9.5</version>
	</dependency>

在pom.xml中配置jdk版本

   <properties>
	 	<maven.compiler.source>1.8</maven.compiler.source>
    	<maven.compiler.target>1.8</maven.compiler.target>
	</properties>

4.編寫表現層代碼

@RestController
public class UserController {
	@RequestMapping("query")
	public Map<String, Object> query(){
		
		HashMap<String, Object> map = new HashMap<String, Object>();
		map.put("code", 0);
		return map;
	}
		
}

5.配置web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>TomcatDemo</display-name>
  
                 <!-- 編碼級過濾器 -->
	<filter>
		<filter-name>characterEncodingFilter</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>UTF-8</param-value>
		</init-param>
	</filter>
	
	<filter-mapping>
		<filter-name>characterEncodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
  
  <!-- 配置SpringMVC的核心控制器 -->
  <servlet>
  	<servlet-name>springmvc</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<init-param>
  		<param-name>ContextConfigLocation</param-name>
  		<param-value>classpath:spring.xml</param-value>
  	</init-param>
  	<load-on-startup>1</load-on-startup>
  </servlet>
  
  <servlet-mapping>
  	<servlet-name>springmvc</servlet-name>
  	<url-pattern>/</url-pattern>
  </servlet-mapping>
  
</web-app>

6.SpringMVC的配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop" 
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
		http://www.springframework.org/schema/beans/spring-beans.xsd 
		http://www.springframework.org/schema/mvc 
		http://www.springframework.org/schema/mvc/spring-mvc.xsd 
		http://www.springframework.org/schema/context 
		http://www.springframework.org/schema/context/spring-context.xsd 
		http://www.springframework.org/schema/aop 
		http://www.springframework.org/schema/aop/spring-aop.xsd 
		http://www.springframework.org/schema/tx 
		http://www.springframework.org/schema/tx/spring-tx.xsd">
		
	<!-- 掃描具有注解的類 -->
	<context:component-scan base-package="com.wn"></context:component-scan>
	<!-- 使SpringMVC的注解生效 -->
	<mvc:annotation-driven></mvc:annotation-driven>
	
	<!-- 配置靜態(tài)資源過濾器 -->
	<mvc:resources location="/" mapping="/**"></mvc:resources>
</beans>