POM

• 1.5

  <parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>1.5.10.RELEASE</version>
  <relativePath/>
  </parent>

• 2.0

  <parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>2.0.3.RELEASE</version>
  <relativePath/>
  </parent>

Spring Data

Spring Data的一些方法进行了重命名：

• findOne(id) -> findById(id) （返回的是Optional）
• delete(id) -> deleteById(id)
• exists(id) -> existsById(id)
• findAll(ids) -> findAllById(ids)

配置

在升级时，可以在pom中增加spring-boot-properties-migrator，这样在启动时会提示需要更改的配置：

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-properties-migrator</artifactId>
<scope>runtime</scope>
</dependency>

其中改动较大的是security（The security auto-configuration is no longer customizable，A global security auto-configuration is now provided）、management、banner、server等。

• security
  security开头的配置及management.security均已过期，如以下的配置不再支持，需要调整到代码中：

  security:
  ignored: /api-docs,/swagger-resources/**,/swagger-ui.html**,/webjars/**

• management

  management:
  security:
  enabled: false
  port: 8090

  修改为：

  management:
  server:
  port: 8090

• datasource

  datasource:
  initialize: false

  修改为：

  datasource:
  initialization-mode: never

如使用PostgreSQL，可能会报错：Method org.postgresql.jdbc.PgConnection.createClob() is not yet implemented hibernate，需修改配置：

jpa:
database-platform: org.hibernate.dialect.PostgreSQLDialect
properties:
hibernate:
default_schema: test
jdbc:
lob:
non_contextual_creation: true

• banner调整为spring.banner
• server调整为server.servlet

更多需要调整的参数请看文末参考文档。

Security

WebSecurityConfigurerAdapter

• security.ignored

  @Override
  public void configure(WebSecurity web) throws Exception {
  web.ignoring().antMatchers("/api-docs", "/swagger-resources/**", "/swagger-ui.html**", "/webjars/**");
  }

• AuthenticationManager
  如在代码中注入了AuthenticationManager,

  @Autowired
  private AuthenticationManager authenticationManager;

  在启动时会报错：Field authenticationManager required a bean of type 'org.springframework.security.authentication.AuthenticationManager' that could not be found.请在WebSecurityConfigurerAdapter中增加以下代码：

  @Bean
  @Override
  public AuthenticationManager authenticationManagerBean() throws Exception {
  return super.authenticationManagerBean();
  }

Actuator

• 配置属性变化

management.endpoints.web.base-path的默认值为/actuator，即Actuator访问路径前部增加了actuator([/actuator/health]，[/actuator/info])，这可以在启动日志中看到。
因management.security不再支持，权限配置需添加到WebSecurityConfigurerAdapter中：

.authorizeRequests()
.requestMatchers(EndpointRequest.to("health", "info")).permitAll()

• Endpoint变化

新特性

• Configuration Property Binding
  可以在代码中直接使用Binder API从配置文件中读取内容：

  public class Person implements EnvironmentAware {
  private Environment environment;
  
  @Override
  public void setEnvironment(Environment environment) {
  this.environment = environment;
  }
  
  public void bind() {
  List<PersonName> people = Binder.get(environment)
  .bind("my.property", Bindable.listOf(PersonName.class))
  .orElseThrow(IllegalStateException::new);
  }
  }

  YAML配置

  my:
  property:
  - first-name: Jane
  last-name: Doe
  - first-name: John
  last-name: Doe

• Spring Data Web Configuration
  新增spring.data.web配置来设置分页和排序：

  # DATA WEB (SpringDataWebProperties)
  spring.data.web.pageable.default-page-size=20 # Default page size.
  spring.data.web.pageable.max-page-size=2000 # Maximum page size to be accepted.
  spring.data.web.pageable.one-indexed-parameters=false # Whether to expose and assume 1-based page number indexes.
  spring.data.web.pageable.page-parameter=page # Page index parameter name.
  spring.data.web.pageable.prefix= # General prefix to be prepended to the page number and page size parameters.
  spring.data.web.pageable.qualifier-delimiter=_ # Delimiter to be used between the qualifier and the actual page number and size properties.
  spring.data.web.pageable.size-parameter=size # Page size parameter name.
  spring.data.web.sort.sort-parameter=sort # Sort parameter name.

• 支持自定义JdbcTemplate

  # JDBC (JdbcProperties)
  spring.jdbc.template.fetch-size=-1 # Number of rows that should be fetched from the database when more rows are needed.
  spring.jdbc.template.max-rows=-1 # Maximum number of rows.
  spring.jdbc.template.query-timeout= # Query timeout. Default is to use the JDBC driver's default configuration. If a duration suffix is not specified, seconds will be used.

• 支持hibernate自定义命名策略
• Reactive
  更多新特性请查看Release Notes。

参考文档

Spring Boot Reference Guide 2.0.3.RELEASE
Spring Boot 2.0 Migration Guide
Spring Boot 2.0 Configuration Changelog
Spring Boot 2.0 Release Notes
Spring Boot Relaxed Binding 2.0