Spring boot SpringBoot将数据存储在h2数据库中，但它可以'；t获取数据&；按id在浏览器上显示它_Spring Boot_H2

Spring boot SpringBoot将数据存储在h2数据库中，但它可以'；t获取数据&；按id在浏览器上显示它

spring-boot

Spring boot SpringBoot将数据存储在h2数据库中，但它可以'；t获取数据&；按id在浏览器上显示它,spring-boot,h2,Spring Boot,H2,我已经用3个变量创建了alien.class，通过使用data.mysql文件，我将数据提取到h2数据库中&我想在web浏览器上访问我的数据。当我输入aid并单击Submit按钮时，我应该获得特定的alien id值，但我得到的是-->${alien} 1.外国人阶级 package com.telusko.demo.model; import javax.persistence.Entity; import javax.persistence.Id; import org.springfra

我已经用3个变量创建了alien.class，通过使用data.mysql文件，我将数据提取到h2数据库中&我想在web浏览器上访问我的数据。当我输入aid并单击Submit按钮时，我应该获得特定的alien id值，但我得到的是-->${alien}

1.外国人阶级

package com.telusko.demo.model;

import javax.persistence.Entity;
import javax.persistence.Id;
import org.springframework.stereotype.Component;

@Entity
@Component
public class Alien 
{
    @Id
    private int aid;
    private String aname;
    private String tech;
    
    public int getAid() {
        return aid;
    }
    public void setAid(int aid) {
        this.aid = aid;
    }
    public String getAname() {
        return aname;
    }
    public void setAname(String aname) {
        this.aname = aname;
    }
    
    public String getTech() {
        return tech;
    }
    public void setTech(String tech) {
        this.tech = tech;
    }
    @Override
    public String toString() {
        return "Alien [aid=" + aid + ", aname=" + aname + ", tech=" + tech + "]";
    }
}

2.外星控制员

package com.telusko.demo.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;

import com.telusko.demo.dao.AlienRepo;
import com.telusko.demo.model.Alien;

@Controller
public class AlienController 
{
    @Autowired
    AlienRepo repo;
    
    @RequestMapping("/")
    public String home()
    {
        return "home";
    }
    @RequestMapping("/addAlien")
    public String addAlien(Alien alien)
    {
        repo.save(alien);
        return "home";
    }
    
    @RequestMapping("/getAlien")
    public ModelAndView getAlien(@RequestParam int aid )
    {
        ModelAndView mv = new ModelAndView("showAlien");
        Alien alien = repo.findById(aid).orElse(new Alien());
        mv.addObject(alien);
        return mv;
    }
}

3.home.jsp

<%@ 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>

    <form action="addAlien">
        <input type="text" name="aid"><br>
        <input type="text" name="aname"><br>
        <input type="text" name="tech"><br>
        <input type="submit"><br>
    </form>
    
    <form action="getAlien">
        <input type="text" name="aid"><br>
        <input type="submit"><br>
    </form>

</body>
</html>

6.应用程序属性

server.port=8085
spring.profiles.active=@spring.profiles.active@
spring.h2.console.enabled=true
spring.datasource.url=jdbc:h2:mem:vikram
spring.jpa.open-in-view=false
server.error.whitelabel.enabled=false
spring.jpa.defer-datasource-initialization=true
spring.thymeleaf.check-template=true
spring.thymeleaf.check-template-location=true
spring.thymeleaf.enabled=true
spring.thymeleaf.prefix=classpath:/templates/
spring.thymeleaf.suffix=.jsp
spring.datasource.username=sa
spring.datasource.password=

7.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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.telusko</groupId>
    <artifactId>bootjpaa</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>bootjpaa</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        
        <!-- https://mvnrepository.com/artifact/org.apache.tomcat/tomcat-jasper -->
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-jasper</artifactId>
    <version>9.0.45</version>
</dependency>
        

    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
    </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
<packaging>war</packaging>
</project>


4.0.0
org.springframework.boot
spring启动程序父级
2.5.0
com.telusko
bootjpaa
0.0.1-快照
bootjpaa
SpringBoot的演示项目
1.8
org.springframework.boot
spring引导启动器数据jpa
org.springframework.boot
SpringBootStarterWeb
org.apache.tomcat
雄猫贾斯珀
9.0.45
com.h2数据库
氢
org.springframework.boot
弹簧起动试验
测试
org.springframework.boot
弹簧靴启动器jdbc
org.springframework.boot
弹簧启动装置
org.springframework.boot
springbootmaven插件
战争

server.port=8085
spring.profiles.active=@spring.profiles.active@
spring.h2.console.enabled=true
spring.datasource.url=jdbc:h2:mem:vikram
spring.jpa.open-in-view=false
server.error.whitelabel.enabled=false
spring.jpa.defer-datasource-initialization=true
spring.thymeleaf.check-template=true
spring.thymeleaf.check-template-location=true
spring.thymeleaf.enabled=true
spring.thymeleaf.prefix=classpath:/templates/
spring.thymeleaf.suffix=.jsp
spring.datasource.username=sa
spring.datasource.password=

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.telusko</groupId>
    <artifactId>bootjpaa</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>bootjpaa</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        
        <!-- https://mvnrepository.com/artifact/org.apache.tomcat/tomcat-jasper -->
<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-jasper</artifactId>
    <version>9.0.45</version>
</dependency>
        

    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
    </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
<packaging>war</packaging>
</project>