springboot 入门

使用maven构建project项目, 配置aliyun仓库, 不赘述
springboot 版本需要: jdk1.7+, maven3.2+ , gradle2.9+
配置文件

引入父包, 放在<project>标签内, 期内包含大量配置好的依赖, 在自己项目中添加这些一来是不需要写<version>

  <parent> 
        <groupId>org.springframework.boot</groupId> 
        <artifactId>spring-boot-starter-parent</artifactId>
        <!--!这里版本不能使用properties配置--> 
        <version>1.5.2.RELEASE</version> 
  </parent>

有时候我们自己公司内有父pom, 不能直接添加parent, 可以通过以下方式

<dependencyManagement>
     <dependencies>
        <dependency>
            <!-- Import dependency management from Spring Boot -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-dependencies</artifactId>
            <version>1.5.2.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

引入web启动包, 因为我们开发的是web工程，所以需要在pom.xml中引入spring-boot-starter-web,spring官方解释说spring-boot-start-web包含了spring webmvc和tomcat等web开发的特性。
```
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>
```

加入仓库配置, 如果是release版本不需要

(you don't need this if you are using a .RELEASE version)

<repositories>
        <repository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/snapshot</url>
            <snapshots><enabled>true</enabled></snapshots>
        </repository>
        <repository>
            <id>spring-milestones</id>
            <url>http://repo.spring.io/milestone</url>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/snapshot</url>
        </pluginRepository>
        <pluginRepository>
            <id>spring-milestones</id>
            <url>http://repo.spring.io/milestone</url>
        </pluginRepository>
    </pluginRepositories>

直接使用Main启动spring, plugin需要添加, 如果使用 spring-boot:run 不需要此配置

<build>  
    <plugins>  
           <plugin>  
               <groupId>org.springframework.boot</groupId>  
               <artifactId>spring-boot-maven-plugin </artifactId>  
          </plugin>  
      </plugins>  
  </build>

程序主入口

@RestController  //springmvc 注解, 返回给调用者字符串
@SpringBootApplication // 自动给程序添加默认属性 
public class App {  
    
  @RequestMapping("/")  
  public String hello(){  
    return "Hello world!";  
  }  
    
  public static void main(String[] args) {  
    SpringApplication.run(App.class, args);  
  }  
}

启动: 运行main函数
1. 　　run as : spring-boot:run
2. 　　右键, run as java Application

配置pom.xml文件, 使用maven-compiler-plugins插件锁定jdk版本和maven-surefire-plugins插件配置maven-test

<?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.wenbronk</groupId>
    <artifactId>SpringBootTest</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.5.RELEASE</version>
    </parent>

    <!-- Additional lines to be added here... -->
     <dependencies>
         <!-- web 启动的jar包 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        
    <!--jpa的jar包 ，操作数据库的，类似hibernate-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        
        <!--mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        
        <!--thymeleaf模板jar，是很不错的html数据传递取值，类似jsp的jstl-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
    </dependencies>

    <!--maven的插件-->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        
    <!-- 配置java版本 不配置的话默认父类配置的是1.6-->
    <pluginManagement>
      <plugins>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <configuration>
            <source>1.7</source>
            <target>1.7</target>
          </configuration>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>

</project>

然后运行maven dependecy:tree, 下载依赖到本地仓库中

注意:

java.version属性
- 　　spring 默认使用jdk1.6, 如果想使用1.8, 需要如下配置
```
<properties>
    <java.version>1.8</java.version>
</properties>
```
- 添加spring-boot-starter-web依赖

　　　　　　　spring通过spring-boot-starter-*来支持具体的某个功能

　　　　　　　　具体请参照: http://docs.spring.io/spring-boot/docs/1.2.3.RELEASE/reference/html/using-boot-build-systems.html#using-boot-starter-poms

错误:

使用1.5.1版本一直报错

[INFO] Scanning for projects...
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[FATAL] Non-parseable POM C:\Users\231\.m2\repository\org\springframework\boot\spring-boot-dependencies\1.5.1.RELEASE\spring-boot-dependencies-1.5.1.RELEASE.pom: only whitespace content allowed before start tag and not o (position: START_DOCUMENT seen o... @1:1)  @ C:\Users\231\.m2\repository\org\springframework\boot\spring-boot-dependencies\1.5.1.RELEASE\spring-boot-dependencies-1.5.1.RELEASE.pom, line 1, column 1
 @ 
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]   
[ERROR]   The project com.example:myproject:0.0.1-SNAPSHOT (E:\iwhere\SpringBootTest\pom.xml) has 1 error
[ERROR]     Non-parseable POM C:\Users\231\.m2\repository\org\springframework\boot\spring-boot-dependencies\1.5.1.RELEASE\spring-boot-dependencies-1.5.1.RELEASE.pom: only whitespace content allowed before start tag and not o (position: START_DOCUMENT seen o... @1:1)  @ C:\Users\231\.m2\repository\org\springframework\boot\spring-boot-dependencies\1.5.1.RELEASE\spring-boot-dependencies-1.5.1.RELEASE.pom, line 1, column 1 -> [Help 2]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
[ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/ModelParseException

解决: 更换版本为1.5.2就好了.....

posted @ 2017-02-04 13:53 bronk 阅读(748) 评论(0) 编辑收藏举报

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springboot 入门

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