spring boot 习惯大于配置 比springMVC简介很多，开发过成功免去了烦人的XML配置。项目采用的导出jar包的方式配置（jar依赖内置tomcat），maven管理依赖，pom配置如下：
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.4.RELEASE</version> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <java.version>1.8</java.version> </properties> <dependencies> <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>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.11</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build>spring boot 配置文件：application.properties（放置在项目src文件下即可），前2个配置就是允许无密码访问shutdown，关闭由main启动jar包。 #\u542F\u7528shutdown endpoints.shutdown.enabled=true #\u7981\u7528\u5BC6\u7801\u9A8C\u8BC1 endpoints.shutdown.sensitive=false server.port=80 spring.datasource.url = jdbc:mysql://localhost:3306/test spring.datasource.username = root spring.datasource.password = **** spring.datasource.driverClassName = com.mysql.jdbc.Driver # Specify the DBMS spring.jpa.database = MYSQL # Show or not log for each sql query spring.jpa.show-sql = true # Hibernate ddl auto (create, create-drop, update) spring.jpa.hibernate.ddl-auto = update # Naming strategy spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy # stripped before adding them to the entity manager) spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect spring.thymeleaf.cache=false上面2个文件就已经配置好了spring boot，下面实现具体功能。实体类：如果没有在数据库建表和字段，实体类可自动创建：（可使用注视配置字段长度、是否为空等）
import java.math.BigDecimal; import java.util.Date; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; @Entity public class User { @Id @GeneratedValue(strategy = GenerationType.AUTO) private int id; private String name; private int height1; private int sex; private Date birthday; private Date sendtime; // 日期类型，格式：yyyy-MM-dd HH:mm:ss private BigDecimal price; private float floatprice; private double doubleprice; public int getId() { return id; } public String getName() { return name; } public int getHeight1() { return height1; } public int getSex() { return sex; } public Date getBirthday() { return birthday; } public Date getSendtime() { return sendtime; } public BigDecimal getPrice() { return price; } public float getFloatprice() { return floatprice; } public double getDoubleprice() { return doubleprice; } public void setId(int id) { this.id = id; } public void setName(String name) { this.name = name; } public void setHeight1(int height1) { this.height1 = height1; } public void setSex(int sex) { this.sex = sex; } public void setBirthday(Date birthday) { this.birthday = birthday; } public void setSendtime(Date sendtime) { this.sendtime = sendtime; } public void setPrice(BigDecimal price) { this.price = price; } public void setFloatprice(float floatprice) { this.floatprice = floatprice; } public void setDoubleprice(double doubleprice) { this.doubleprice = doubleprice; } } 数据操作接口类 import org.springframework.data.repository.CrudRepository; public interface UserRespositroy extends CrudRepository<User , Integer> { User findUserById(Integer id); } controller控制器： import java.util.Map; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; @Controller @EnableAutoConfiguration public class DemoController { @Autowired UserRespositroy userRespositroy; @RequestMapping("/") @ResponseBody String home() { return "Hello World!"; } @RequestMapping("/hello") //@ResponseBody public String hello(Map<String,Object> map){ Iterable<User> user = userRespositroy.findAll(); for(User u : user){ System.out.println(u.getDoubleprice()); } map.put("key", "11111111111111111"); return "/hello"; } public static void main(String[] args) throws Exception { SpringApplication.run(DemoController.class, args); } } 模板：在src下建立文件夹main/resources/templates，把hello.html放置在里面即可
