Spring框架详解

2019-05-31 06:43发布

前言

Spring boot + Mybatis + Thymeleaf + Druid +mySql

开发环境(小编使用的版本)

JDK版本 :1.8及以上 (JDK1.8);

开发工具 :Intellij IDEA (IDEA2018.2);

服务器 :Tomcat(务必比JDK版本高,小编不在解释(Jar包不用配置、War需要配置)) (Tomcat9) ;

JRE包 :Maven仓库 (Maven3.6);

数据库 :MySql(MySql5.5) ;

正题

Spring boot :2.1.1RELEASE ;

Thymeleaf

Mybatis

阿里云的连接池 : Druid ;

步骤

1.创建Springboot:

2.创建项目文件结构

3.POM依赖

如果使用阿里云的连接池不选择JDBC,小编用的阿里云这里不选择

点击Finish;

注:可能Maven中无Jar包需要从仓库下载,需要耐心等待(可以去听首歌)

5.POM


xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0

org.springframework.boot
spring-boot-starter-parent
2.1.1.RELEASE


com.spring
boot
0.0.1-SNAPSHOT
boot
Demo project for Spring Boot


1.8





org.springframework.boot
spring-boot-devtools
true



com.alibaba
druid-spring-boot-starter
1.1.10


org.springframework.boot
spring-boot-starter-thymeleaf


org.springframework.boot
spring-boot-starter-web


org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.2



mysql
mysql-connector-java
runtime


org.springframework.boot
spring-boot-starter-test
test






org.springframework.boot
spring-boot-maven-plugin





注:IDEA失效解决方法

6.小编使用的application.properties文件,项目启动识别两种格式的文件properties和yml文件:

#缓存设置为false, 修改之后马上生效
spring.thymeleaf.cache=false
spring.thymeleaf.encoding=UTF-8
#spring.thymeleaf.prefix=classpath:/templates/
#spring.thymeleaf.suffix=.html

server.port=8080
server.tomcat.uriEncoding=utf-8

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url=jdbc:mysql://localhost:3306/web?useUnicode=true&serverTimezone=GMT%2B8&characterEncoding=utf-8&allowMultiQueries=true&useSSL=false
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.druid.driverClassName=com.mysql.cj.jdbc.Driver
#初始化连接
spring.datasource.initialSize=20
#最大空闲数
spring.datasource.maxActive=50
#最小空闲数
spring.datasource.minIdle=10
#获取连接等待时间
#spring.datasource.druid.max-wait=60000
#最小等待时间
#spring.datasource.minEvictableIdleTimeMillis=3600000

7.其他文件生成

User.java

package com.spring.boot.bean;

public class User {

public Integer uid;
public String uname;
public String upassword;

public Integer getUid() {
return uid;
}

public void setUid(Integer uid) {
this.uid = uid;
}

public String getUanme() {
return uname;
}

public void setUanme(String uanme) {
this.uname = uanme;
}

public String getUpassword() {
return upassword;
}

public void setUpassword(String upassword) {
this.upassword = upassword;
}

@Override
public String toString() {
return "User{" +
"uid=" + uid +
", uname='" + uname + '\'' +
", upassword='" + upassword + '\'' +
'}';
}
}

UserDao.java

注解的形式,小编感觉比XML好用

package com.spring.boot.dao;

import com.spring.boot.bean.User;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import java.util.List;

public interface UserDao {

@Select("select * from user")
public List AllUser();

@Update(" ")
public int Update(User user);

}

UserService.java

package com.spring.boot.service;

import com.spring.boot.bean.User;

import java.util.List;

public interface UserService {

public List AllUser();

public int Update(User user);

}

UserImpl.java

主要是注解问题Service可以命名,主要还是看自己的日常使用

package com.spring.boot.service.impl;

import com.spring.boot.bean.User;
import com.spring.boot.dao.UserDao;
import com.spring.boot.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class UserImpl implements UserService {

@Autowired
private UserDao userDao;

@Override
public List AllUser() {

return userDao.AllUser();
}

@Override
public int Update(User user) {
return userDao.Update(user);
}
}

注:userDao报红解决方法

UserController.java

package com.spring.boot.controller;

import com.spring.boot.bean.User;
import com.spring.boot.service.impl.UserImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class UserController {

@Autowired
private UserImpl userimpl;

@RequestMapping("/index")
public String index(Model model, User user){
model.addAttribute("user",userimpl.AllUser());
user.uid = 2;
user.uname = "nan";
user.upassword = "lou";
userimpl.Update(user);
System.out.println("******************"+userimpl.AllUser());
System.out.println("******************"+userimpl.Update(user));
return "index";
}

}

index.html





Title


Spring boot+Thymeleaf!




8.界面显示

文章来源: https://www.toutiao.com/group/6667787970403107331/