java - org.postgresql.util.PSQLException：错误：关系“员工”不存在位置：13

问题描述

我正在尝试根据https://javainspires.blogspot.com/2020/07/spring-boot-2-spring-data-jdbc-jdbc.html上给出的教程将数据库从 MySQL 更改为 PostgreSQL 。我经常遇到标题中显示的错误。

雇员.java

package com. example.demo;

import javax.persistence.Entity;
import javax.persistence.Table;

public class Employee {

    private String username;
    private String email;
    private String password;

    public Employee() {
        super();
        // TODO Auto-generated constructor stub
    }

    public Employee(String username, String email, String password) {
        super();
        this.username = username;
        this.email = email;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}

员工控制器

package com. example.demo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;

@Controller
public class EmployeeController {

    @Autowired
    JdbcTemplate jdbcTemplate;
    
    @PostMapping(path = "addUser")
    public String addUser(Employee user) {
        
        String insert_query = "INSERT INTO employee (username,email,password) VALUES(?,?,?)"; 
        
        int rows = jdbcTemplate.update(insert_query,
                user.getUsername(), 
                user.getEmail(),
                user.getPassword());
        
        if(rows == 1) {
            return "success"; 
        } else {
            return "error"; 
        }
                
    
    }
    
}

Html 文件：index.html

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="ISO-8859-1">
<title>Java Inspires</title>
</head>
<body>

 <form th:action="@{/addUser}" th:object="${user}" method="post" >
 
  <p>User Name :<input type="text" name="username" /></p>
  <p>Email :<input type="email" name="email" /></p>
  <p>Password :<input type="password" name="password" /></p>
  <p><input type="submit" value="Sign Up" /></p>
 </form>
</body>
</html>

应用程序属性

spring.datasource.url=jdbc:postgresql://localhost:5432/database
spring.datasource.username=postgres
spring.datasource.password=admin
spring.datasource.driver-class-name=org.postgresql.Driver

架构.sql

CREATE TABLE employee
(
    username varchar(100) NOT NULL, 
    email varchar(100) NOT NULL,
    password varchar(100) NOT NULL
);

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>2.4.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>JDBC</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>JDBC</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>11</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-jdbc</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-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

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

</project>

标签： javaspringpostgresqlspring-boot

java - org.postgresql.util.PSQLException：错误：关系“员工”不存在位置：13

问题描述

解决方案

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