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python 将json数据提取转化为txt的方法

2018-10-31 13:23 来源:互联网 编辑:admin

概述

相信对于Java开发者而言,spring和springMvc两个框架一定不陌生,这两个框架需要我们手动配置的地方非常多,各种的xml文件,properties文件,构建一个项目还是挺复杂的,在这种情况下,springboot应运而生,他能够快速的构建spring项目,而且让项目正常运行起来的配置文件非常少,甚至只需要几个注解就可以运行整个项目。

总的说来,springboot项目可以打成jar包独立运行部署,因为它内嵌servlet容器,之前spring,springMvc需要的大量依赖,可以通过starter来帮助我们简化配置,当然还有其他好多优点,这里就不一一赘述,小伙伴们可以自行搜索解答。

简单项目构建

工具

eclipse maven

首先,我们新建一个maven项目,在eclipse左侧右击选择new----》other,选择新建Maven project

python 将json数据提取转化为txt的方法

输入group Id,artifact Id,点击完成

python 将json数据提取转化为txt的方法

这样一个简单的项目架子就完成了,但是啥都没有,项目结构如下图所示:

python 将json数据提取转化为txt的方法

下面我们就开始配置搭建springboot项目。

1.添加依赖

python 将json数据提取转化为txt的方法

完整porm代码如下:

<project xmlns="http://maven.apache.org/POM/4.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.cfxmn.springboot</groupId>
  <artifactId>springbootDemo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <!-- 通过继承spring-boot-starter-parent项目来获得一些合理的默认配置 -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.6.RELEASE</version>
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <!-- Spring Boot Web 依赖 -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!-- Spring Boot Test 依赖 -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
    <!-- 使用Lombok可以减少很多重复代码的书写。比如说getter/setter/toString等方法的编写 -->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
    </dependency>
  </dependencies>
</project>

下面我们新建一些包和添加项目的启动类,如下图所示:

python 将json数据提取转化为txt的方法

其中,控制器DemoController的内容非常简单,内容如下:

package com.cfxmn.springboot.springbootDemo.controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import lombok.extern.slf4j.Slf4j;
@RestController
@Slf4j
public class DemoController {
  @PostMapping("/demo")

  public void demoTest() {

    // 这边简单起见,打印一下日志

    log.info("success call");

  }

}

可能有些同学对其中的几个注解有些疑问,我这边简单说明下,

1.RestController

这个注解其实就是@ResponseBody + @Controller

2.PostMapping

这个注解其实就是@RequestMapping("xxxxxx", Method=RequestMethod.POST)

这两个其实都是组合注解,简化使用

我们再来看看,项目的启动类SpringbootDemoApplication的内容:

package com.cfxmn.springboot.springbootDemo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication

public class SpringbootDemoApplication {

  public static void main(String[] args) {

    SpringApplication.run(SpringbootDemoApplication.class, args);

  }
}

是的,你没看错,只要运行这个main方法,就能启动这个spring项目,具体是怎么启动的容器,我们之后再分析,其实主要就是在注解SpringBootApplication上。

下面我们就来运行下,看下启动日志:

 .  ____     _      __ _ _

 /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \

( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \

 \\/ ___)| |_)| | | | | || (_| | ) ) ) )

 ' |____| .__|_| |_|_| |_\__, | / / / /

 =========|_|==============|___/=/_/_/_/

 :: Spring Boot ::    (v1.5.6.RELEASE)

 

2018-10-25 23:52:41.985 INFO 1700 --- [      main] c.c.s.s.SpringbootDemoApplication    : Starting SpringbootDemoApplication on DESKTOP-KB78HJK with PID 1700 (E:\workspace\springbootDemo\target\classes started by gepengfa in E:\workspace\springbootDemo)

2018-10-25 23:52:41.990 INFO 1700 --- [      main] c.c.s.s.SpringbootDemoApplication    : No active profile set, falling back to default profiles: default

2018-10-25 23:52:42.088 INFO 1700 --- [      main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7f416310: startup date [Thu Oct 25 23:52:42 CST 2018]; root of context hierarchy

2018-10-25 23:52:44.561 INFO 1700 --- [      main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)

2018-10-25 23:52:44.584 INFO 1700 --- [      main] o.apache.catalina.core.StandardService  : Starting service [Tomcat]

2018-10-25 23:52:44.588 INFO 1700 --- [      main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.16

2018-10-25 23:52:44.813 INFO 1700 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]    : Initializing Spring embedded WebApplicationContext

2018-10-25 23:52:44.813 INFO 1700 --- [ost-startStop-1] o.s.web.context.ContextLoader      : Root WebApplicationContext: initialization completed in 2733 ms

2018-10-25 23:52:45.074 INFO 1700 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]

2018-10-25 23:52:45.083 INFO 1700 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean  : Mapping filter: 'characterEncodingFilter' to: [/*]

2018-10-25 23:52:45.083 INFO 1700 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean  : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]

2018-10-25 23:52:45.083 INFO 1700 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean  : Mapping filter: 'httpPutFormContentFilter' to: [/*]

2018-10-25 23:52:45.085 INFO 1700 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean  : Mapping filter: 'requestContextFilter' to: [/*]

2018-10-25 23:52:45.582 INFO 1700 --- [      main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7f416310: startup date [Thu Oct 25 23:52:42 CST 2018]; root of context hierarchy

2018-10-25 23:52:45.705 INFO 1700 --- [      main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/demo],methods=[POST]}" onto public void com.cfxmn.springboot.springbootDemo.controller.DemoController.demoTest()

2018-10-25 23:52:45.710 INFO 1700 --- [      main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)

2018-10-25 23:52:45.711 INFO 1700 --- [      main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)

2018-10-25 23:52:45.759 INFO 1700 --- [      main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

2018-10-25 23:52:45.759 INFO 1700 --- [      main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

2018-10-25 23:52:45.817 INFO 1700 --- [      main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

2018-10-25 23:52:46.321 INFO 1700 --- [      main] o.s.j.e.a.AnnotationMBeanExporter    : Registering beans for JMX exposure on startup

2018-10-25 23:52:46.529 INFO 1700 --- [      main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)

2018-10-25 23:52:46.599 INFO 1700 --- [      main] c.c.s.s.SpringbootDemoApplication    : Started SpringbootDemoApplication in 5.092 seconds (JVM running for 5.764) 

从启动日志标黄的部分可以看出,项目启动成功了,访问端口默认是8080(这个端口是可以改动的)

下面我们通过postMan请求下,

python 将json数据提取转化为txt的方法

查看控制台

2018-10-25 23:59:26.385 INFO 1700 --- [nio-8080-exec-2] c.c.s.s.controller.DemoController    : success call

说明调用成功。

到此,一个简单的springboot项目就构建完成了,但这只是一个空的架子,内容还可载丰富。

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