java 安装配置等相关

java 版本 1.8.x

https://blog.csdn.net/fenglailea/article/details/82152210

风.foxwho

IDEA 安装配置

略

IDEA 创建项目

Create new Project

这里写图片描述

配置 pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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.foxwho</groupId>
    <artifactId>fox</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.M4</version>
    </parent>

    <dependencies>
        <!--集成springmvc框架并实现自动配置-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>net.sourceforge.nekohtml</groupId>
            <artifactId>nekohtml</artifactId>
            <version>1.9.22</version>
        </dependency>
    </dependencies>

    <!--非正式版的springboot要加这一段。如果是正式版。上面的org.springframework.boot的version可以改成2.0.0.RELEASE，并且不需要这段-->
    <repositories>
        <repository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>spring-milestones</id>
            <url>http://repo.spring.io/milestone</url>
        </repository>
        <repository>
            <id>maven-ali</id>
            <url>http://maven.aliyun.com/nexus/content/groups/public//</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
                <updatePolicy>always</updatePolicy>
                <checksumPolicy>fail</checksumPolicy>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/snapshot</url>
        </pluginRepository>
        <pluginRepository>
            <id>spring-milestones</id>
            <url>http://repo.spring.io/milestone</url>
        </pluginRepository>
    </pluginRepositories>
</project>

等待 maven 自动加载创建包

创建包

在 src/main/java下创建包com.foxwho(java文件夹右击，菜单New->Package)

创建入口

在包com.foxwho下创建 Class 名称为 Application,内容如下

package com.foxwho;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

如图
这里写图片描述

创建控制器 IndexController

在包com.foxwho下创建包controller,在包controller创建 Class IndexController 内容如下

package com.foxwho.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class IndexController {
    @RequestMapping(value = "/",method = RequestMethod.GET)
    public String index(){
        return "index";
    }
}

创建 index.html

注意：html标签中xmlns:th="http://www.thymeleaf.org" 必须存在，否则 thymeleaf 模板不识别
thymeleaf 模板默认存储根目录是 resources/templates文件夹中

在 resources 文件下创建templates文件夹，在templates下创建 index.html
内容如下

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
 这是 IndexController
</body>
</html>

创建控制器 HelloController

在包controller创建 Class HelloController 内容如下

package com.foxwho.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class HelloController {
    @RequestMapping("/say.html")
    public @ResponseBody String say() {
        return "Spring Boot => say.html";
    }
}

配置 application.yml

在 resources 创建 application.yml文件，内容如下

spring:
  thymeleaf:
    cache: false # 开发时关闭缓存,不然没法看到实时页面
    mode: LEGACYHTML5 # 用非严格的 HTML   ,HTML5
    encoding: UTF-8
    servlet:
      content-type: text/html
  #prefix: classpath:

server:
  port: 8080 #更改tomcat端口