常见问题汇总(十五)——关于Spring boot

清疚 2022-05-21 03:47 298阅读 0赞

### **1、spring-boot:run -Dserver.port=\# 启动时端口依旧是默认8080** ###

**      **  热编译依赖spring-boot-devtools会使注入无效

### **2、debug启动模块时，无法访问JSP文件**         ###

注意选择正确的工作目录

![70][]

### **3、 ip + port + /health 访问actuator报404错误** ###

**   **    spring cloud 2.0 以后 actuator访问路径改为 ip + port + /actuator/health

### **4、修改后的html无法立即生效** ###

**        a:添加devtools依赖   **

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

**        b:设置idea**

1） “File” -> “Settings” -> “Build,Execution,Deplyment” -> “Compiler”，选中打勾 “Build project automatically” 。

2） 组合键：“Shift+Ctrl+Alt+/” ，选择 “Registry” ，选中打勾 “compiler.automake.allow.when.app.running”

### **5、环境动态切换失效，$\{name\}未替换** ###

1）spring boot依赖管理

<dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-dependencies</artifactId>
                    <version>2.0.1.RELEASE</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>

2）环境配置

<profiles>
            <profile>
                <id>local</id>
                <activation>
                    <activeByDefault>true</activeByDefault>
                </activation>
                <properties>
                    <profile.active>local</profile.active>
                </properties>
            </profile>
            <profile>
                <id>test</id>
                <properties>
                    <profile.active>test</profile.active>
                </properties>
            </profile>
            <profile>
                <id>prepare</id>
                <properties>
                    <profile.active>prepare</profile.active>
                </properties>
            </profile>
            <profile>
                <id>prod</id>
                <properties>
                    <profile.active>prod</profile.active>
                </properties>
            </profile>
        </profiles>

3）配置过滤

<resources>
                <resource>
                    <directory>src/main/resources</directory>
                    <filtering>true</filtering>
                </resource>
            </resources>
            <filters>
                <filter>src/main/environment/${profile.active}/jdbc.properties</filter>
                <filter>src/main/environment/${profile.active}/server.properties</filter>
            </filters>

4）maven编译插件

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

### **6、yml与properties注入变量的区别** ###

1）yml文件

server:
      port: 8080
    spring:
      profiles:
        active: @profileActive@   #注入maven变量 用@变量名@
      application:
        name: @pom.artifactId@
      boot:
        admin:
          username: ${security.user.name:admin}
          password: ${security.user.password:admin} 
    
    #注入配置变量 用${变量名}

2）properties

# DATABASE (MySQL)
    spring.datasource.url=${jdbc.url}
    spring.datasource.username=${jdbc.username}
    spring.datasource.password=${jdbc.password}
    spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
    spring.datasource.driverClassName=com.mysql.jdbc.Driver
    spring.datasource.filters=stat,wall,log4j
    spring.datasource.useGlobalDataSourceStat=true
    #server
    spring.profiles.active= ${profile.active} 
    
    #maven变量和配置变量都用${}

### 7、Spring Boot默认配置失效 ###

在某个配置类中继承了WebMvcConfigurationSupport

![70 1][]

### 8、Spring Boot从1.x升级为2.x时项目出错 ###

1）升级对应的cloud：

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-eureka-client</artifactId>
            </dependency>
    
        <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>
    
    
    
        <dependency>
    		<groupId>org.springframework.cloud</groupId>
    		<artifactId>spring-cloud-starter-feign</artifactId>
    	</dependency>
    
         <dependency>
    	    <groupId>org.springframework.cloud</groupId>
    		<artifactId>spring-cloud-starter-openfeign</artifactId>
    	</dependency>
    
    
    
    
            <dependency>
                <groupId>io.zipkin.java</groupId>
                <artifactId>zipkin-autoconfigure-ui</artifactId>
            </dependency>
            <dependency>
                <groupId>io.zipkin.java</groupId>
                <artifactId>zipkin-server</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-zipkin</artifactId>
            </dependency>

2)修改配置文件

spring:
      application:
        name: pig-eureka-server
      cloud:
        config:
          uri: http://localhost:10000
    security:
      basic:
        enabled: true # 启用身份认证
      user:
        name: pig # 定义用户名
        password: gip6666 # 定义密码
    
    
    spring:
      application:
        name: pig-eureka-server
      cloud:
        config:
          uri: http://localhost:10000
      security:
        basic:
          enabled: true # 启用身份认证
        user:
          name: pig # 定义用户名
          password: gip6666 # 定义密码
    
    
    
    log.level: root
    
    log.level.{targetPackage}: root

3）关闭csrf检测（2.x默认开启）

/**
     * @author sunyiran
     * @date 2018-10-31
     */
    @Configuration
    public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    
    
        @Override
        protected void configure(HttpSecurity http) throws Exception {
            http.csrf().disable();
            super.configure(http);
        }
    }

4）升级过时的依赖

5）修改过时代码

[70]: /images/20220521/e200cb96744f4e25a9ede29fc6cf8ae6.png
[70 1]: /images/20220521/930abc1548954184ada49b5a5f84e0b6.png