Spring Boot

時間 2019-12-05

標籤 spring boot 欄目 Spring 简体版

原文原文鏈接

todo

webFlux

Spring Boot webFlux

第三方資料

long77

http://www.cnblogs.com/cnblog-long/category/1042057.html

博客對應源碼

https://github.com/lianggzone/springboot-action

怎麼看文檔

先指南

每一個章節 , 通常只看關注的章節

很是趕時間的話 , 直接根據問題看文檔

‘How-to’ guides

下載源碼

rimraf spring-boot-source && git clone --depth 1 https://github.com/spring-projects/spring-boot.git

文件名太長

rimraf spring-boot-source  &&  git clone --depth 1 https://github.com/spring-projects/spring-boot.git
Cloning into 'spring-boot'...
remote: Counting objects: 8053, done.
remote: Compressing objects: 100% (5295/5295), done.
remote: Total 8053 (delta 2601), reused 4671 (delta 1342), pack-reused 0
Receiving objects: 100% (8053/8053), 5.49 MiB | 233.00 KiB/s, done.
Resolving deltas: 100% (2601/2601), done.
error: unable to create file spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/plugin/DependencyManagementPluginActionIntegrationTests-helpfulErrorWhenVersionlessDependencyFailsToResolve.gradle: Filename too long
Checking out files: 100% (5201/5201), done.
fatal: unable to checkout working tree
warning: Clone succeeded, but checkout failed.
You can inspect what was checked out with 'git status'
and retry the checkout with 'git checkout -f HEAD'

 
     
   

             
         
rimraf spring-boot-source  &&  git clone --depth 1 https://github.com/spring-projects/spring-boot.git
Cloning into 'spring-boot'...
remote: Counting objects: 8053, done.
remote: Compressing objects: 100% (5295/5295), done.
remote: Total 8053 (delta 2601), reused 4671 (delta 1342), pack-reused 0
Receiving objects: 100% (8053/8053), 5.49 MiB | 233.00 KiB/s, done.
Resolving deltas: 100% (2601/2601), done.
error: unable to create file spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/resources/org/springframework/boot/gradle/plugin/DependencyManagementPluginActionIntegrationTests-helpfulErrorWhenVersionlessDependencyFailsToResolve.gradle: Filename too long
Checking out files: 100% (5201/5201), done.
fatal: unable to checkout working tree
warning: Clone succeeded, but checkout failed.
You can inspect what was checked out with 'git status'
and retry the checkout with 'git checkout -f HEAD'

經常使用依賴

<!-- region QueryDSL -->

        <dependency>
            <groupId>com.querydsl</groupId>
            <artifactId>querydsl-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>com.querydsl</groupId>
            <artifactId>querydsl-apt</artifactId>
        </dependency>
        <!-- endregion QueryDSL -->

 
     
   

             
         
        <!-- region QueryDSL -->
        <dependency>
            <groupId>com.querydsl</groupId>
            <artifactId>querydsl-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>com.querydsl</groupId>
            <artifactId>querydsl-apt</artifactId>
        </dependency>
        <!-- endregion QueryDSL -->

必備插件

# 在控制檯裏打印 MyBatis SQL語句 ( 訪問的是本身的數據庫 ) , 方便開發階段調試

#log4j.logger.druid.sql.Statement = DEBUG

server.port = 8011

<!-- Lombok -->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
</dependency>

<!-- 熱更新 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
    <optional>true</optional>
</dependency>

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

<!-- project 下 -->
<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

 
     
   

             
         
<!-- Lombok -->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
</dependency>
<!-- 熱更新 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
    <optional>true</optional>
</dependency>
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>
<!-- project 下 -->
<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

歸類到 spring，不是Spring Boot 獨有的

只有兩我的能夠用聊天室，由於配置

但另外一個你們都能收穫得

這個無視 9001端口代碼中沒出現

各類依賴，應該讓Maven 管理，否則版本各類問題，並且互相拷貝不方便

基於gradled

2.15開始構建

問題

修改內置的 Tomcat 端口號

在application.properties中添加

server.port=8011

可將tomcat默認端口號修改成8011

信息: validateJarFile(E:\web\WebSocketProject\WebSocketJavaProject\target\WebsocketHome\WEB-INF\lib\javax.el-api-3.0.0.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/el/Expression.class

WEB-INF/lib/servlet-api.jar not loaded

http://www.cnblogs.com/zdz8207/p/java-tomcat-servlet-api-jar-not-loaded.html

把

H:\Software\Tomcat\apache-tomcat-7.0.34\lib

下的 servlet-api

拷貝到項目裏

E:\web\daJin\WebRoot\WEB-INF\lib

依賴包導入

配置一下，注意web的root根目錄參考 http://www.2cto.com/kf/201608/539241.html

我同時用第1 種和第2 種方法

導入，用第1種

配置，用第2種

https://github.com/roncoo/spring-boot-demo.git

最好的方式，只有項目源代碼，把IDE的東西刪掉，同一款IDE的配置文件極可能不通用，不一樣IDE之間更可能不通用

E:\web\daJin\out\artifacts\daJin_Web_exploded

E:\web\SpringBootInit

默認用 Hibernate 5.0.x

By default, Spring Boot uses Hibernate 5.0.x. However it’s also possible to use 4.3.x or 5.2.x if you wish. Please refer to the Hibernate 4 and Hibernate 5.2 samples to see how to do so.

Error creating bean with name 'servletContainer'

知識點

配置文件

http://blog.csdn.net/forezp/article/details/70437576

多個環境配置文件

建立項目的幾種方法：
IDE+插件，IDEA 自帶插件；eclipse+插件
在線web建立項目 https://start.spring.io/
命令行工具，Spring CLI
手動從零開始，建立Maven（重新建pom.xml文件開始）或者Gradle 項目

啓動過程當中

Tomcat started on port(s): 8011 (http)

提示後端端口號

即便有

Started Application in 28.003 seconds (JVM running for 37.966)

也可能還沒啓動成功 , 要再等一下

工具

Lombok 自動生成 setter 和 getter

<!-- Lombok -->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
</dependency>

 
<!-- Lombok -->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
</dependency>

Spring CLI

SdkMan 不提供win版本

http://sdkman.io/

官網也很難訪問

SDKMAN! (The Software Development Kit Manager) can be used for managing multiple versions of various binary SDKs, including Groovy and the Spring Boot CLI.

熱部署（熱更新）工具 spring-boot-devtools

spring-boot-devtools 熱更新 "依賴"

pom裏添加依賴（參考博客 http://www.cnblogs.com/java-zhao/p/5502398.html）

<!-- 熱更新 -->
<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-devtools</artifactId>
	<optional>true</optional>
</dependency>

 
<!-- 熱更新 -->
<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-devtools</artifactId>
 <optional>true</optional>
</dependency>

ctrl+F9 手動編譯一下，而後它會把項目熱更新( 也會自動部署 )。

應該有辦法設置成一改動 Java 文件就自動（編譯+部署），但我以爲應該手動控制是否立刻熱部署。全都自動會浪費 CPU 資源, 我想多改幾行再一塊兒熱更新

不是 ctrl +F10 熱更新快捷鍵

IDEA 左下角出現這個說明成功，有可能還要多等一下

spring-boot-maven-plugin 熱更新 "插件"

若是上面的方法不行 ( 方法指的是添加 <artifactId>spring-boot-devtools</artifactId> 依賴 )，就在它的基礎上加上這個插件

在 <project> 標籤下的 <build> 下的 <plugins> 下添加

build 和 dependencies 同一級別

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <configuration>
        <!-- 若是沒有該項配置, spring-boot-devtools 可能失效, 即沒法熱更新 -->
        <fork>true</fork>
    </configuration>
</plugin>

 
<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <configuration>
        <!-- 若是沒有該項配置, spring-boot-devtools 可能失效, 即沒法熱更新 -->
        <fork>true</fork>
    </configuration>
</plugin>

完整 :

在 <project> 下添加

<build>

		<plugins>

			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<fork>true</fork>
				</configuration>
			</plugin>

		</plugins>

	</build>

 
     
   

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