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>2.0.7.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
Old propertyNew propertyendpoints.id.*management.endpoint.id.*endpoints.cors.*management.endpoints.web.cors.*endpoints.jmx.*management.endpoints.jmx.*management.addressmanagement.server.addressmanagement.context-pathmanagement.server.servlet.context-pathmanagement.ssl.*management.server.ssl.*management.portmanagement.server.port
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
EndpointChanges/actuatorNo longer available. There is, however, a mapping available at the root of management.endpoints.web.base-path that provides links to all the exposed endpoints./auditeventsThe after parameter is no longer required/autoconfigRenamed to /conditions/docsNo longer available (the API documentation is part of the published documentation now)/healthRather than relying on the sensitive flag to figure out if the health endpoint had to show full details or not, there is now a management.endpoint.health.show-details option: never, always, when-authorized. By default, /actuator/health is exposed and details are not shown./traceRenamed to /httptrace
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。
Swagger
<dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>2.9.2</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>2.9.2</version> </dependency>
Swagger 2.9版本，增加了对@ApiParam属性example的处理，在Swagger UI和文档中会显示，因此要注意设置合适的example值：
@ApiOperation(value = "Delete airline by id")
@GetMapping("/airlines/delete/{airlineId}")
public void deleteAirline(@ApiParam(required = true, example = "123") @PathVariable Long airlineId)
否则你会看到Warn日志：
AbstractSerializableParameter
@JsonProperty("x-example")
public Object getExample() {
if (example == null) {
return null;
}
try {
if (BaseIntegerProperty.TYPE.equals(type)) {
return Long.valueOf(example);
} else if (DecimalProperty.TYPE.equals(type)) {
return Double.valueOf(example);
} else if (BooleanProperty.TYPE.equals(type)) {
if ("true".equalsIgnoreCase(example) || "false".equalsIgnoreCase(defaultValue)) {
return Boolean.valueOf(example);
}
}
} catch (NumberFormatException e) {
LOGGER.warn(String.format("Illegal DefaultValue %s for parameter type %s", defaultValue, type), e);
}
return example;
}
另外Swagger 2.9.2会为org.springframework.data.domain.Pageable自动增加@ApiImplicitParams。
参考文档
Spring Boot Reference Guide 2.0.7.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
作者：川川Jason
原文：https://blog.51cto.com/7308310/2133163