@RestController
@RequestMapping(value="/users")
public class MyRestController {
@RequestMapping(value="/{user}", method=RequestMethod.GET)
public User getUser(@PathVariable Long user) {
// ...
}
@RequestMapping(value="/{user}/customers", method=RequestMethod.GET)
List getUserCustomers(@PathVariable Long user) {
// ...
}
@RequestMapping(value="/{user}", method=RequestMethod.DELETE)
public User deleteUser(@PathVariable Long user) {
// ...
}
}
import org.springframework.boot.autoconfigure.web.HttpMessageConverters;
import org.springframework.context.annotation.*;
import org.springframework.http.converter.*;
@Configuration
public class MyConfiguration {
@Bean
public HttpMessageConverters customConverters() {
HttpMessageConverter> additional = ...
HttpMessageConverter> another = ...
return new HttpMessageConverters(additional, another);
}
}
03. 自定义json serializer与json deserializer
如果使用Jackson去串行化一个数据或对象话一个json 数据,可能需要些自己的json对象转换器。自定义的json转换器通过一个module的形式注册到JsonComponent ,其提供了 @JsonComponent 使其能够快速注册到json上去。你可以使用@JsonComponent 直接进行n JsonSerializer or JsonDeserializer 的转换,也可以使用内部类的形式:代码如下
import java.io.*;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import org.springframework.boot.jackson.*;
@JsonComponent
public class Example {
public static class Serializer extends JsonSerializer {
// ...
}
public static class Deserializer extends JsonDeserializer {
// ...
}
}
public class MyErrorViewResolver implements ErrorViewResolver {
@Override
public ModelAndView resolveErrorView(HttpServletRequest request,
HttpStatus status, Map model) {
// Use the request or status to optionally return a ModelAndView
return ...
}
}
@Configuration
public class MyConfiguration {
@Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurer() {
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/api/**");
}
};
}
}
Spring WebFlux框架
spring webflux是在spring 5.0中引入的响应式的web编程框架。不像spring mvc,其不需要servlet api。其是完全异步并且是非阻塞的。通过交互式流实现交互式流的标准。
spring webflux带来的两大特点:功能性以及其基于注解。基于注解这块与spring mvc比较的类似,如下代码:
@RestController
@RequestMapping("/users")
public class MyRestController {
@GetMapping("/{user}")
public Mono getUser(@PathVariable Long user) {
// ...
}
@GetMapping("/{user}/customers")
Flux getUserCustomers(@PathVariable Long user) {
// ...
}
@DeleteMapping("/{user}")
public Mono deleteUser(@PathVariable Long user) {
// ...
}
}
其功能性的变量“
WebFlux.fn”:将实际处理请求与路由配置进行分离。如下代码:
@Configuration
public class RoutingConfiguration {
@Bean
public RouterFunction monoRouterFunction(UserHandler userHandler) {
return route(GET("/{user}").and(accept(APPLICATION_JSON)), userHandler::getUser)
.andRoute(GET("/{user}/customers").and(accept(APPLICATION_JSON)), userHandler::getUserCustomers)
.andRoute(DELETE("/{user}").and(accept(APPLICATION_JSON)), userHandler::deleteUser);
}
}
@Component
public class UserHandler {
public Mono getUser(ServerRequest request) {
// ...
}
public Mono getUserCustomers(ServerRequest request) {
// ...
}
public Mono deleteUser(ServerRequest request) {
// ...
}
}
在系统运行后,在线程快照里总是看到线程池的名字为pool-xx,这样导致很不好定位,怎么给线程池一个有意义的名字呢。参照ThreadPoolExecutor类的ThreadFactory,自己实现ThreadFactory接口,重写newThread方法即可。参考代码如下:
public class Named
错误: IE 中"HTML Parsing Error:Unable to modify the parent container element before the child element is closed"
现象: 同事之间几个IE 测试情况下,有的报这个错,有的不报。经查询资料后,可归纳以下原因。
PropertyPlaceholderConfigurer是个bean工厂后置处理器的实现,也就是BeanFactoryPostProcessor接口的一个实现。关于BeanFactoryPostProcessor和BeanPostProcessor类似。我会在其他地方介绍。PropertyPlaceholderConfigurer可以将上下文(配置文件)中的属性值放在另一个单独的标准java P
创建一个类
public class ContextInitListener implements ServletContextListener
使得该类成为一个监听器。用于监听整个容器生命周期的,主要是初始化和销毁的。
类创建后要在web.xml配置文件中增加一个简单的监听器配置,即刚才我们定义的类。
<listener>
<des
http://developer.apple.com/iphone/library/qa/qa2009/qa1649.html
Excerpt:
You are getting this warning because you probably added your Info.plist file to your Copy Bundle
hi,
自己在做工程的时候,遇到批量插入数据的数据修复场景。我的思路是在插入前准备一个临时表,临时表的整理就看当时的选择条件了,临时表就是要插入的数据集,最后再批量插入到数据库中。
WITH tempT AS (
SELECT
item_id AS combo_id,
item_id,
now() AS create_date
FROM
a