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Elastic search -- Rest style operation index, mapping and document ElasticSearch provides a REST API that can be accessed through HTTP and JSON. 1. Index operation 1. Basic operations of index: PUT /Index name Create index DELETE /Index name delete index DELETE /* Delete all indexes GET /Index name View specified index i ...

Retrofit is a high-quality and efficient HTTP request library. Retrofit relies on OkHttp internally. It encapsulates the underlying code and details of OKHttp and extends functions such as auto-parsing data model for returning results, switching of network engines, interceptors... restFul is a web API interface that conforms to the rest arc ...

In project development, JSON format is used for data transmission between interfaces and between front and back ends. 1 fastjson usage Alibaba's fastjson is currently the most widely used JSON parsing framework. This article will also use fastjson. 1.1 introducing dependencies <dependency> <groupId>com.alibaba</groupId&gt ...

1. Spring MVC file upload 1.1 multi file upload Multi file upload is similar to single file upload Steps: Form: <form method="post" enctype="multipart/form-data"> <!--Provide multiple input，Multiple uploaded files can be selected--> <input type="file" name="images" /> <input type="file" name="images" /> &lt ...

1. Comments on @RequestMapping Add the @RequestMapping annotation before the method to process the request to configure the mapping relationship between the request path and the method to process the request! In this note it is declared that: @AliasFor("path") String[] value() default {}; And: @AliasFor("value") String[] path() defaul ...

Complete static resources First find this class: webmvcoautoconfiguration. In this jar package, it is still auto configuration There is an addResourceHandlers method in webmvcoautoconfiguration, which is used to automatically configure the static resource directory. public void addResourceHandlers(ResourceHandlerRegistry registry) { ...

Spring Boot implements common functions of the Web Usually, in Web development, it involves the access support of static resources, the configuration of view parser, the customization of converter and formatter, file upload and download, and even the customization of Servlet related components associated with Web server. Spring Boot framework ...

1.Basic syntax for defining interfaces: [Modifier] interface Interface name extends Parent Interface 1, Parent Interface 2, ... { Definitions of zero to multiple constants... Zero to more than one abstract method definition... Zero to many internal classes, interfaces, enumeration definitions... Zero to more than one default method or ...

brief introduction The full name of CORS is cross domain resource sharing. It is a mechanism based on HTTP header detection. By controlling HTTP header, the permission management function of cross domain resources can be realized. In the previous CORS detailed article, we have a basic explanation of CORS. This article will explain how to ...

1. Getting started 1.1 import dependency All springboot projects must inherit spring boot starter parent <!-- All springboot All projects must be inherited spring-boot-starter-parent --> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> ...