SpringBoot 搭建

一. 搭建springboot web工程

1. 新建Maven工程

2. 写pom.xml

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.hongsen</groupId>
  <artifactId>springboot-jsp2</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>springboot-jsp2 Maven Webapp</name>
  <url>http://maven.apache.org</url>
  
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.8</java.version>
  </properties>
  
<!-- 将当前项目作为springboot-starter的子模块 -->
  <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.4.1.RELEASE</version>
  </parent>
  
  <dependencies>
    <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-web</artifactId>
      </dependency>
      
      <!-- servlet依赖 -->
      <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <scope>provided</scope>
      </dependency>
      <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>jstl</artifactId>
      </dependency>
      
      <!-- Tomcat的支持 -->
      <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-tomcat</artifactId>
          <scope>provided</scope>
      </dependency>
      <dependency>
          <groupId>org.apache.tomcat.embed</groupId>
          <artifactId>tomcat-embed-jasper</artifactId>
          <scope>provided</scope>
      </dependency>
      
      <!-- 引入Maven依赖mysql，jdbc -->
      <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
      </dependency>
      <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-jdbc</artifactId>
      </dependency>
      <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-data-jpa</artifactId>
      </dependency>
      
  </dependencies>
</project>

保存后Eclipse开始下载jar包

3. 若有以下报错：

执行：项目右键 - maven - update project

 4. 添加tomcat

创建Dao层

package com.hongsen.dao;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Repository;

import com.hongsen.domain.Visitor;

@Repository
public class VisitorDao {
    @Autowired
    private JdbcTemplate jdbcTemplate;  //用来操作数据库
    
    /**
     * 增加
     * @param visitor
     */
    public void save(Visitor visitor) {
        jdbcTemplate.update("insert into visitor(name) values(?)", visitor.getName());
    }
    
    /**
     * 查询
     * @param id
     * @return
     */
    public Visitor get(int id) {
        RowMapper<Visitor> rowMapper = new BeanPropertyRowMapper<Visitor>(Visitor.class);
        Visitor visitor = jdbcTemplate.queryForObject("select * from visitor where id=?", rowMapper,id);
        return visitor;
    }
}

创建Service层

package com.hongsen.service;

import com.hongsen.domain.Visitor;

public interface IVisitorService {
    public void save(Visitor visitor);
    Visitor get(int id);
}

package com.hongsen.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.hongsen.dao.VisitorDao;
import com.hongsen.domain.Visitor;

@Service
public class VisitorServiceImpl implements IVisitorService {
    @Autowired
    private VisitorDao dao;
    @Override
    public void save(Visitor visitor) {
        // TODO Auto-generated method stub
        dao.save(visitor);
    }

    @Override
    public Visitor get(int id) {
        // TODO Auto-generated method stub
        return dao.get(id);
    }

}

创建Controller层

package com.hongsen.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.annotation.ReadOnlyProperty;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.hongsen.domain.Visitor;
import com.hongsen.service.IVisitorService;

@Controller
public class VisitorController {
    
    @Autowired
    private IVisitorService visitorService;
    
    @RequestMapping("/visitor/save")
    public String save(String name) {
        Visitor visitor = new Visitor();
        visitor.setName(name);
        visitorService.save(visitor);
        return "save success";
    }
    
    @RequestMapping("/visitor/get")
    public Visitor get(int id) {
        Visitor visitor = visitorService.get(id);
        return visitor;
    }
}

5. 写App.java主程序在根目录

package cn.springboot;

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

@SpringBootApplication    //标记为springboot的应用 
public class App {
    public static void main(String[] args) {
        //启动应用
        SpringApplication .run(App.class, args);
    }
}

6. 配置application.properties对jsp支持

在resources创建一个file文件叫application.properties

server.port=80

#config the prefix and suffix of views
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

#datasource
spring.datasource.url = jdbc:mysql://localhost:3306/rtosxz
spring.datasource.username = root
spring.datasource.password = 123456
spring.datasource.driverClassName = com.mysql.jdbc.Driver

#datasource pool
spring.datasource.max-active=20
spring.datasource.max-idle=8
spring.datasource.min-idle=8
spring.datasource.initial-size=10

7. 在webapp - WEB-INF 下创建jsp文件夹，创建jsp文件

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
    <p>
        ${hi}
    </p>
</body>
</html>

这里的${ }里是controller里的model.addAttribute("hi","welcome");第一个值

7.运行App.java

8. 浏览器输入http://localhost:80/hello 就可访问，结果是：您好

输入http://localhost/visitor/save?name=张三，结果是save success。数据库里有了新的数据