springboot对velocity的支持

爱被打了一巴掌 2022-04-21 14:56 469阅读 0赞

最近在使用springboot中，用velocity作为视图模板的时候，一直出现问题，无法返回页面。  
通过查询资料得知，springboot默认是不支持velocity的，需要添加而外配置。  
并且在高版本的springboot中是不支持velocity了。最高只到1.4.x版本支持，1.5以及以后的版本，都不支持velocity了。

推荐使用：spring4.3之后，推荐FreeMarker作为视图。

package org.springframework.web.servlet.view.velocity;
    
    import org.springframework.web.servlet.view.AbstractUrlBasedView;
    
    /**
     * Convenience subclass of VelocityViewResolver, adding support
     * for VelocityLayoutView and its properties.
     *
     * <p>See VelocityViewResolver's javadoc for general usage info.
     *
     * @author Juergen Hoeller
     * @since 1.2.7
     * @see VelocityViewResolver
     * @see VelocityLayoutView
     * @see #setLayoutUrl
     * @see #setLayoutKey
     * @see #setScreenContentKey
     * @deprecated as of Spring 4.3, in favor of FreeMarker
     */
    @Deprecated
    public class VelocityLayoutViewResolver extends VelocityViewResolver {
    }

--------------------

配置springboot+velocity

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    	<modelVersion>4.0.0</modelVersion>
    
    	<groupId>com.hgh.springboot</groupId>
    	<artifactId>ssm</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<packaging>war</packaging>
    
    	<name>ssm</name>
    	<description>Demo project for Spring Boot</description>
    
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>1.4.2.RELEASE</version>
    		<relativePath/> 
    	</parent>
    
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    		<java.version>1.8</java.version>
    	</properties>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-aop</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-cache</artifactId>
    		</dependency>
    		
    
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.mybatis.spring.boot</groupId>
    			<artifactId>mybatis-spring-boot-starter</artifactId>
    			<version>1.3.2</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-tomcat</artifactId>
    			<scope>provided</scope>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-test</artifactId>
    			<scope>test</scope>
    		</dependency>
    		
    		<dependency>
    			<groupId>commons-io</groupId>
    			<artifactId>commons-io</artifactId>
    			<version>2.4</version>
    		</dependency>
    				<dependency>
    			<groupId>commons-fileupload</groupId>
    			<artifactId>commons-fileupload</artifactId>
    			<version>1.2.2</version>
    		</dependency>
    						
    		<dependency>
    			<groupId>com.alibaba</groupId>
    			<artifactId>druid</artifactId>
    			<version>1.0.26</version>
    		</dependency>
    		
    		        <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
            
            <dependency>
                    <groupId>org.apache.tomcat.embed</groupId>
                    <artifactId>tomcat-embed-jasper</artifactId>
     </dependency>
     
     <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-velocity</artifactId>
    </dependency>
    <dependency>
                    <groupId>javax.servlet</groupId>
                    <artifactId>javax.servlet-api</artifactId>
     </dependency>
    	</dependencies>
    
    	<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    			</plugin>
    		</plugins>
    	</build>
    
    
    </project>

WebMvcConfig

package com.hgh.springboot.ssm;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
    import org.springframework.web.servlet.view.velocity.VelocityLayoutView;
    import org.springframework.web.servlet.view.velocity.VelocityLayoutViewResolver;
    
    @Configuration
    public class WebMvcConfig extends WebMvcConfigurerAdapter{
    
    	/**
    	 * 配置视图解析器
    	 * 针对jsp
    	 * @return
    	 */
    //	@Bean
    //	public InternalResourceViewResolver viewResolver(){
    //		InternalResourceViewResolver viewResolver= new InternalResourceViewResolver();
    //		//配置的是项目编译之后,视图所在的路径
    //		///resources/templates/views/index.jsp
    //		viewResolver.setPrefix("/resources/templates/views/");
    //		viewResolver.setSuffix(".jsp");
    //		viewResolver.setViewClass(JstlView.class);
    //		//viewResolver.setViewClass(VelocityLayoutView.class);
    //		return viewResolver;
    //	}
    	
    	
    //	/**
    //	 * 配置视图解析器
    //	 * 针对velocity，spring后面已经不推荐使用了，改用freemark
    //	 * @return
    //	 */
    	@Bean
    	public VelocityLayoutViewResolver viewResolver(){
    		VelocityLayoutViewResolver viewResolver= new VelocityLayoutViewResolver();
    		//配置的是项目编译之后,视图所在的路径
    		viewResolver.setPrefix("/");
    		viewResolver.setSuffix(".vm");
    		viewResolver.setViewClass(VelocityLayoutView.class);
    		//viewResolver.setViewClass(VelocityLayoutView.class);
    		return viewResolver;
    	}
    	
    	
    	
    
    }

SsmApplication

package com.hgh.springboot.ssm;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.web.servlet.config.annotation.EnableWebMvc;
    
    @EnableAutoConfiguration
    @SpringBootApplication
    @ComponentScan
    @EnableWebMvc
    public class SsmApplication {
    
    	public static void main(String[] args) {
    		SpringApplication.run(SsmApplication.class, args);
    	}
    }

VelocityContoller

package com.hgh.springboot.ssm.controller;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    @Controller
    public class VelocityContoller {
    
    	@RequestMapping("velocity")
    	public String helloVelocity(){
    		
    		return "testvelocity";
    	}
    }

testvelocity.vm（/ssm/src/main/resources/templates/testvelocity.vm）

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    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>你好</title>
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    <body>
    12341324
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