网站备案麻烦么,做网站的前提,前端开发是做网站的吗,珠海网站建设的公司Javalin 旨在为 Kotlin 和 Java 提供一个易用的轻量级 REST API 库。这个 REST API 易于使用#xff0c;API 也非常的流畅。
Javalin 主要有以下的特点#xff1a; 易用#xff1a;不用提前学习任何概念就可以开始使用 一致的 API#xff1a;所有的处理程序和映射器在 Co…Javalin 旨在为 Kotlin 和 Java 提供一个易用的轻量级 REST API 库。这个 REST API 易于使用API 也非常的流畅。
Javalin 主要有以下的特点 易用不用提前学习任何概念就可以开始使用 一致的 API所有的处理程序和映射器在 Context (ctx) 中都是无效的。 Kotlin 和 Java 拥有几乎完全相同的 API 是框架也是库无需扩展任何功能 拥有完全可定制的嵌入式服务器 (Jetty) JSON 对象映射 通过 AccessManager 接口简单的按端点验证 简单的静态文件处理 生命周期事件 CookieStore一种简单的用来序列化的方法和存储在 cookie 中的对象。 模板渲染 Markdown 渲染
下面是用 Kotlin 实现的 “Hello World” API 的例子。
import io.javalin.Javalin;public class HelloWorld {public static void main(String[] args) {var app Javalin.create(/*config*/).get(/, ctx - ctx.result(Hello World)).start(7070);}
}Request Handler 每个请求处理或者匹配某些路径处理
app.before(ctx - {// runs before all requests
});
app.before(/path/*, ctx - {// runs before request to /path/*
});请求处理
app.get(/output, ctx - {// some codectx.json(object);
});app.post(/input, ctx - {// some codectx.status(201);
});Javalin官网文档地址 下面基于Javalin和springboot、Mybatis-FlexMybatis-Flex官网文档实现一个简单的项目 项目结构
pom.xml
?xml version1.0 encodingUTF-8?
project xmlnshttp://maven.apache.org/POM/4.0.0xmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsdmodelVersion4.0.0/modelVersionparentgroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-parent/artifactIdversion3.1.2/versionrelativePath/ !-- lookup parent from repository --/parentgroupIdcom.kexuexiong/groupIdartifactIdshushan_server/artifactIdversion1.0-SNAPSHOT/versionpropertiesjava.version17/java.versionmaven.compiler.source17/maven.compiler.sourcemaven.compiler.target17/maven.compiler.targetproject.build.sourceEncodingUTF-8/project.build.sourceEncoding/propertiesdependenciesdependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-aop/artifactId/dependencydependencygroupIdcom.mybatis-flex/groupIdartifactIdmybatis-flex-spring-boot-starter/artifactIdversion1.5.3/version/dependencydependencygroupIdcom.mybatis-flex/groupIdartifactIdmybatis-flex-processor/artifactIdversion1.5.3/versionscopeprovided/scope/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-jdbc/artifactId/dependencydependencygroupIdmysql/groupIdartifactIdmysql-connector-java/artifactIdversion8.0.20/versionscoperuntime/scope/dependencydependencygroupIdio.javalin/groupIdartifactIdjavalin/artifactIdversion5.6.1/version/dependencydependencygroupIdorg.projectlombok/groupIdartifactIdlombok/artifactIdoptionaltrue/optional/dependencydependencygroupIdorg.mybatis.spring.boot/groupIdartifactIdmybatis-spring-boot-starter-test/artifactIdversion3.0.2/versionscopetest/scope/dependencydependencygroupIdcom.zaxxer/groupIdartifactIdHikariCP/artifactIdversion4.0.3/version/dependencydependencygroupIdcn.hutool/groupIdartifactIdhutool-all/artifactIdversion5.8.16/version/dependencydependencygroupIdcom.mybatis-flex/groupIdartifactIdmybatis-flex-codegen/artifactIdversion1.5.3/version/dependencydependencygroupIdorg.slf4j/groupIdartifactIdslf4j-simple/artifactIdversion2.0.7/version/dependency/dependenciesbuildpluginsplugingroupIdorg.springframework.boot/groupIdartifactIdspring-boot-maven-plugin/artifactIdconfigurationexcludesexcludegroupIdorg.projectlombok/groupIdartifactIdlombok/artifactId/exclude/excludes/configuration/plugin/plugins/build/projectapplication.yml
spring:datasource:url: jdbc:mysql://数据库ip:3306/shushanusername: rootpassword: 密码mybatis-flex:mapper-locations:- classpath*:/mappers/*.xml
Application.java
package com.kexuexiong;import io.javalin.Javalin;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;import java.util.logging.Logger;SpringBootApplication
MapperScan(com.kexuexiong.mapper)
public class ShuShanApplication {private static Logger LOGGER Logger.getLogger(ShuShanApplication.class.getName());public static void main(String[] args) {SpringApplication.run(ShuShanApplication.class, args);}Beanpublic Javalin init(){Javalin app Javalin.create(/*config*/).get(/, ctx - ctx.result(Hello World)).start(7070);return app;}
}逆向工程工具
package com.kexuexiong.common.utils;import com.mybatisflex.codegen.Generator;
import com.mybatisflex.codegen.config.ColumnConfig;
import com.mybatisflex.codegen.config.GlobalConfig;
import com.zaxxer.hikari.HikariDataSource;public class Codegen {public static void main(String[] args) {//配置数据源HikariDataSource dataSource new HikariDataSource();dataSource.setJdbcUrl(jdbc:mysql://数据库ip:3306/shushan?characterEncodingutf-8);dataSource.setUsername(root);dataSource.setPassword(密码);//创建配置内容两种风格都可以。GlobalConfig globalConfig createGlobalConfigUseStyle1();//GlobalConfig globalConfig createGlobalConfigUseStyle2();//通过 datasource 和 globalConfig 创建代码生成器Generator generator new Generator(dataSource, globalConfig);//生成代码generator.generate();}public static GlobalConfig createGlobalConfigUseStyle1() {//创建配置内容GlobalConfig globalConfig new GlobalConfig();//设置根包globalConfig.setBasePackage(com.kexuexiong);//设置表前缀和只生成哪些表globalConfig.setGenerateSchema(shushan);globalConfig.setTablePrefix();globalConfig.setGenerateTable(demo);//设置生成 entity 并启用 LombokglobalConfig.setEntityGenerateEnable(true);globalConfig.setEntityWithLombok(true);//设置生成 mapperglobalConfig.setMapperGenerateEnable(true);globalConfig.setAuthor(kexuexiong);globalConfig.setControllerGenerateEnable(true);globalConfig.setServiceGenerateEnable(true);globalConfig.setMapperXmlGenerateEnable(true);globalConfig.setMapperXmlPath(src/main/resources/mappers);globalConfig.setServiceImplGenerateEnable(true);//可以单独配置某个列ColumnConfig columnConfig new ColumnConfig();columnConfig.setLarge(true);columnConfig.setVersion(true);return globalConfig;}public static GlobalConfig createGlobalConfigUseStyle2() {//创建配置内容GlobalConfig globalConfig new GlobalConfig();//设置根包globalConfig.getPackageConfig().setBasePackage(com.kexuexiong);//设置表前缀和只生成哪些表setGenerateTable 未配置时生成所有表globalConfig.getStrategyConfig().setGenerateSchema(shushan).setTablePrefix().setGenerateTable(demo);//设置生成 entity 并启用 LombokglobalConfig.enableEntity().setWithLombok(true);//设置生成 mapperglobalConfig.enableMapper();//可以单独配置某个列ColumnConfig columnConfig new ColumnConfig();columnConfig.setColumnName(tenant_id);columnConfig.setLarge(true);columnConfig.setVersion(true);globalConfig.getStrategyConfig().setColumnConfig(account, columnConfig);return globalConfig;}
}
运行该工具类可以生成代码 编写controller类
package com.kexuexiong.controller;import cn.hutool.json.JSONUtil;
import com.kexuexiong.entity.Demo;
import com.kexuexiong.service.DemoService;
import io.javalin.Javalin;
import jakarta.annotation.PostConstruct;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;import java.util.List;Component
Slf4j
public class DemoController {Autowiredprivate Javalin app;Autowiredprivate DemoService demoService;PostConstructpublic void test(){app.get(/hello/{name}, ctx - {ListDemo list demoService.list();log.info(JSONUtil.toJsonStr(list.toString()));ctx.result(Hello: );});}
}
启动程序 Javalin应用在一些小项目还是可以的轻量级。
