SpringBoot使用JSP

1.创建一个webapp子项目

2.导入依赖

<!--

  配置springboot的父节点依赖，之后引入就不需要添加version配置了！

 springboot会自动选择最合适的版本进行添加依赖

 -->

  <parent>

      <groupId>org.springframework.boot</groupId>

      <artifactId>spring-boot-starter-parent</artifactId>

      <version>1.4.1.RELEASE</version>

  </parent>

  <properties>

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

    <!--指定JDK版本 我们使用的是1.8，不配置默认环境是1.6  -->

    <java.version>1.8</java.version>

  </properties>

  <dependencies>

       <dependency>

    <!-- spring-boot-starter-web是为我们提供了包括mvc,aop等需要的一些jar -->

      <groupId>org.springframework.boot</groupId>

      <artifactId>spring-boot-starter-web</artifactId>

      <!-- 因为我们已经配置了 parent 中的version 所以这里不需要指定version了  -->

    </dependency>

        <!-- Spring-boot-devtools -->

    <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-devtools</artifactId>

            <optional>true</optional>

   </dependency>

   <!-- 配置servlet需要的依赖  -->

     <dependency>

            <groupId>javax.servlet</groupId>

            <artifactId>javax.servlet-api</artifactId>

   </dependency>

   <!-- 配置jstl标签库需要的依赖  -->

     <dependency>

            <groupId>javax.servlet</groupId>

            <artifactId>jstl</artifactId>

   </dependency> 

   <!-- 添加tomcat的支持 -->

   <dependency>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-tomcat</artifactId>

   </dependency>

   <dependency>

        <groupId>org.apache.tomcat.embed</groupId>

        <artifactId>tomcat-embed-jasper</artifactId>

   </dependency>

  </dependencies>

3.创建一个application.yml文件

spring:

  mvc:

    view:

      suffix: .jsp

      prefix: /jsp/

4.编辑Controller

@Controller

@RequestMapping("/jsp")

public class JSPController {

    @RequestMapping("/first")

    public String jsp(Model model){

        model.addAttribute("name","张三");

        return "index";

    }

}

5.创建一个jsp文件

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>

<head>

    <title>hehe</title>

</head>

<body>

<h2>呵呵,欢迎:${name}1234</h2>

</body>

</html>

6.启动运行

SpringBoot使用thymeleaf

1.pom文件中增加thymeleaf的依赖和版本号

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-thymeleaf</artifactId>

</dependency>

<thymeleaf.version>3.0.0.RELEASE</thymeleaf.version>

<thymeleaf-layout-dialect.version>2.0.0</thymeleaf-layout-dialect.version>

2.application.yml文件中新增thymeleaf配置

3.在resources中创建templates文件夹

并且创建一个index.html

4.创建一个entity　　Student实体类

public class Student {

    private Integer id;

    private String name;

}

5.编写Controller控制器

@Controller

public class thyController {

    @RequestMapping("/thy")

    public String thy(Model model){

        List<Student> list = new ArrayList<>();

        Student stu1 = new Student(1,"张三");

        Student stu2 = new Student(2,"李四");

        Student stu3 = new Student(3,"王大爷是弟弟，垃圾");

        list.add(stu1);

        list.add(stu2);

        list.add(stu3);

        model.addAttribute("stulist",list);

        return "index";

    }

}

6.书写index.html中的代码

<!DOCTYPE html>

<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">

<head>

    <meta charset="UTF-8">

    <title>temples</title>

</head>

<body>

<table border="1">

    <tr>

        <td>学生编号</td>

        <td>学生姓名</td>

    </tr>

    <tr th:each="stu:${stulist}">

        <td th:text="${stu.id}"></td>

        <td th:text="${stu.name}"></td>

    </tr>

</table>

</body>

</html>

7.运行效果

SpringBoot 与JPA

1. 实现数据的增删改查

　　1.1：在pom文件中引入需要的依赖

  <!--  引入mysql需要的依赖  -->

    <dependency>  

            <groupId>mysql</groupId>  

            <artifactId>mysql-connector-java</artifactId>  

   </dependency>  

    <!--  引入spring data jpa需要的依赖  -->

    <dependency>  

            <groupId>org.springframework.boot</groupId>  

            <artifactId>spring-boot-starter-data-jpa</artifactId>  

   </dependency>

2.创建resources文件夹创建application.yml文件进行编写

##数据库四大连接参数

spring:

  datasource:

    driver-class-name: com.mysql.jdbc.Driver

    url: jdbc:mysql:///springdatajpa

    username: root

    password: 123456

##jpa表的生成策略

  jpa:

    hibernate:

      ddl-auto: update

3.编写entity

@Entity

public class Grade {

    @Id

    @GeneratedValue(strategy= GenerationType.AUTO)

    private Integer grade_id;

    private String grade_name;

    public Integer getGrade_id() {

        return grade_id;

    }

    public void setGrade_id(Integer grade_id) {

        this.grade_id = grade_id;

    }

    public String getGrade_name() {

        return grade_name;

    }

    public void setGrade_name(String grade_name) {

        this.grade_name = grade_name;

    }

}

4.编写dao层

/**

 * CrudRepository<实体，主键数据类型>

 */

@Repository

public interface IGradeMapper extends CrudRepository<Grade,Integer> {

}

5.编写增删改查的方法service

public interface IGradeService {

    public Grade insertGrade(Grade grade);

    public Grade updateGrade(Grade grade);

    public void deleteGrade(Integer id);

    public Iterable<Grade> getAll();

}

6.编写实现类

@Service("iGradeService")

public class IGradeServcieImpl implements IGradeService {

    @Resource

    private IGradeMapper iGradeMapper;

    @Override

    public Grade insertGrade(Grade grade) {

        return iGradeMapper.save(grade);

    }

    @Override

    public Grade updateGrade(Grade grade) {

        return iGradeMapper.save(grade);

    }

    @Override

    public void deleteGrade(Integer id) {

        iGradeMapper.delete(id);

    }

    @Override

    public Iterable<Grade> getAll() {

        return iGradeMapper.findAll();

    }

}

7.创建Controller层进行编写

@RestController

@RequestMapping("/IGradeController")

public class IGradeController {

    @Resource

    private IGradeService iGradeService;

    //新增数据

    @RequestMapping("/insertGrade")

    public Grade insertGrade(){

        Grade grade=new Grade();

        grade.setGrade_name("Y2");

        return iGradeService.insertGrade(grade);

    }

　　//修改数据

    @RequestMapping("/updateGrade")

    public Grade updateGrade(){

        Grade grade=new Grade();

        grade.setGrade_id(2);

        grade.setGrade_name("S3");

        return iGradeService.updateGrade(grade);

    }

　　//删除数据

    @RequestMapping("/deleteGrade")

    public void deleteGrade(){

        iGradeService.deleteGrade(1);

    }

    //查看数据

    @RequestMapping("/getAllGrade")

    public Iterable<Grade> getAllGrade(){

       return  iGradeService.getAll();

    }

}