4月15到4月17我都在把毕设从eclipse重构到IDEA中,springboot最让我头疼的是它的版本问题,由于每个版本对应的依赖包都有可能出错,这里分享一下如何成功移植用eclipse写的springboot到IDEA中,比较简单的步骤我这里不详细说了,说一下我遇到的一些很难找出问题的地方 ps:只是针对于个人项目和我我的水平,大神勿喷嘿嘿html
<!--more-->java
*************************** APPLICATION FAILED TO START *************************** Description: Field chapterDao in cn.yixue.service.ChapterServiceImp required a bean of type 'cn.yixue.dao.ChapterMapper' that could not be found. The injection point has the following annotations: - @org.springframework.beans.factory.annotation.Autowired(required=true) Action: Consider defining a bean of type 'cn.yixue.dao.ChapterMapper' in your configuration. 以上提取出有用的信息:required a bean of type 'xxxx' that could not be found. 表明bean没注入,从bean注入寻找方向,有的人会说我用@Autowired之类的种种,但没扫到,好吧~
解决方法:mysql
@Mapper public interface ChapterMapper { ...... }
@MapperScan(value = "cn.yixue.video.dao")
value 后的包必定要对应到mapper类对应的地方,好比个人mapper在dao下,就是cn.yixue.video.dao
@SpringBootApplication @MapperScan(value = "cn.yixue.video.dao") @EnableDiscoveryClient public class YixueVideoApplication { public static void main(String[] args) { SpringApplication.run(YixueVideoApplication.class, args); } }
*************************** APPLICATION FAILED TO START *************************** Description: Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured. Reason: Failed to determine a suitable driver class Action: Consider the following: If you want an embedded database (H2, HSQL or Derby), please put it on the classpath. If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
网上好多解决方案,针对于每一个人都不同,个人应该是打包的时候读不到个人配置文件,须要在pom.xml
里面加resourses
指定下配置文件,由于eclipse是识别的,Idea可能不会?我也不太知道,反正是加上了,由于好像有Idea读不到个人application.properties
或者application.yml
文件,我就一次性都配上了,这个你们具体遇到的时候再去搜一下就行,不用刻意的记:git
<build> <!-- 若是不添加此节点mybatis的mapper.xml文件都会被漏掉。 --> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.yml</include> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.yml</include> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources> </build>
最后一个next后直接finish......github
以后再pom.xml里面会看到Idea自动为你引入的依赖和 spring-boot-maven-plugin
插件,插件版本我建议仍是稍微低一点,由于boot真的是随着版本变更改动很大,我用的是web
<plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <version>1.5.9.RELEASE</version> </plugin>
这个也是在网上搜了好久以后找到的一个版本,还有一个1.4.9.RELEASE
也能够,以后就是看看Idea导入的SpringCloud
依赖的版本version
,版本错误很容易报java.lang.AbstractMethodError: null
这个错误我找了好久,缘由也是看了一个大佬的博客找到的,具体就是由于Idea给你的依赖是根据你选择的springboot的版原本的,通常人不会去修改,这也就是为何eclipse不容易报错,Idea容易的缘由,由于eclipse得本身找...redis
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent>
个人parent的版本是<version>2.0.5.RELEASE</version>
,大佬的文章也提到了2.1.0和2.1.0如下的有区别,我仍是建议用低的,低的差异不会太大,还挺稳......我还用过1.5.9.RELEASE...spring
eureka
的服务的时候Idea提供的版本也要改,这个缘由是由于若是使用${spring-cloud.version}
的话,当版本号下调到2.1.0
如下的时候,一些组件的包仍是2.1.0
它不会跟随parent版本的下调而下调,也就是parent的版本小于组件的版本,这时候就会出问题 当改成Finchley.RELEASE
的时候,组件的依赖就会跟随parent的版本下调而下调<properties> <java.version>1.8</java.version> <!-- 这是Idea给设的 --> <!--<spring-cloud.version>Greenwich.SR1</spring-cloud.version>--> <spring-cloud.version>Finchley.RELEASE</spring-cloud.version> </properties> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement>
@Autowired private RestTemplate restTemplate;
直接装配的,以后到了Idea中报错了:sql
ERROR 31473 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter : *************************** APPLICATION FAILED TO START *************************** Description: Field restTemplate in 'xxxxxx' required a bean of type 'org.springframework.web.client.RestTemplate' that could not be found. Action: Consider defining a bean of type 'org.springframework.web.client.RestTemplate' in your configuration.
解决方法以下,大体就是先靠@Bean装配,再用...:apache
@Bean public RestTemplate restTemplate(RestTemplateBuilder builder) { // Do any additional configuration here return builder.build(); } @Autowired private RestTemplate restTemplate;
以后就不报错了(针对于个人错误)
个人架构
圈住的地方是下方的pom.xml文件
<?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>cn.yixue</groupId> <artifactId>yixue</artifactId> <version>1.0-SNAPSHOT</version> <packaging>pom</packaging> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.5.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <java.version>1.8</java.version> <lombok.version>1.14.8</lombok.version> <fastjson.version>1.2.31</fastjson.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</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> <version>5.1.46</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.5</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>${lombok.version}</version> <scope>provided</scope> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>${fastjson.version}</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <version>1.5.9.RELEASE</version> <configuration> <!--该配置必须--> <fork>true</fork> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build> <modules> <module>yixue-commom</module> <module>yixue-admin</module> <module>yixue-video</module> </modules> </project>
这就是我移植项目遇到的一些问题,下面列一些大佬的博客,对我帮助很大,不胜感激 若有侵权,请联系我删除
原文出处:https://www.cnblogs.com/cxylff/p/10969375.html