错误 SchemaUpdate:237 - "from" 附近：语法错误

Question

我是 Spring 的新手，我只是想知道这些错误是什么意思？

ERROR SchemaUpdate:236 - HHH000388: Unsuccessful: create table FacebookPosts (id  integer, created_time timestamp not null, from varchar not null, message varchar not null, picture_url varchar not null, post_id varchar not null, to varchar not null, updated_time timestamp not null, primary key (id))
ERROR SchemaUpdate:237 - near "from": syntax error

我正在使用 Spring Social 的 Facebook 库来获取我最近的帖子并将它们存储在 SQLite 数据库中。

我的代码如下：

Facebook 控制器

package adam.social.media.controller;

import java.util.HashMap;
import java.util.Map;

import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.social.facebook.api.Facebook;
import org.springframework.social.facebook.api.Post;
import org.springframework.social.facebook.api.impl.FacebookTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import adam.social.media.model.FacebookModel;
import adam.social.media.repository.FacebookRepository;

@Controller
public class FacebookController {   

    private Facebook facebook;

    private FacebookRepository facebookRepository;

    private static Logger logger = Logger.getLogger(FacebookController.class
            .getName());

    @Autowired
    public FacebookController(FacebookRepository facebookRepository) {
        logger.debug("ENTERING FacebookController");

        this.facebookRepository = facebookRepository;               

        facebook = new FacebookTemplate("CAACEdEose0cBAGjDHb17dTdS4VJdhuL5ypxQppYWDKTDa963rn4rvZBoUfAtYlxcFzkf8aejL0c4cBvtR2OG0VjWB7bsBstq71SLzHB6d4CvgLmzJyi5kRAysZCFlj6TIFVhwfMZAHzYaDNyWiI3z7P5x8jPOvdUCXSR8pxmeqyeifnH46S5h0p1szuOL6uSdeQlAF3ZAP5esWtqS8GqG3LOSlfKSx4ZD");              

        logger.debug("EXITING FacebookController");
    }

    @RequestMapping(method = RequestMethod.GET)
    public ModelAndView getFacebookStatus(FacebookModel facebookModel) {
        logger.debug("ENTERING getFacebookStatus");

        ModelAndView modelAndView = new ModelAndView("index");      

        Post post = facebook.feedOperations().getFeed().get(0);

        facebookModel.setPostId(post.getId());
        facebookModel.setTo(post.getTo().get(0).getName());
        facebookModel.setFrom(post.getFrom().getName());
        facebookModel.setCreatedTime(post.getCreatedTime());
        facebookModel.setUpdatedTime(post.getUpdatedTime());
        facebookModel.setMessage(post.getMessage());
        facebookModel.setPictureUrl(post.getPicture());

        modelAndView.addObject("facebookModel", facebookModel);

        logger.debug("EXITING getFacebookStatus");

        return modelAndView;
    }

    @RequestMapping(method = RequestMethod.POST)
    public ModelAndView postFacebookStatus(FacebookModel facebookModel, BindingResult result) {
        logger.debug("ENTERING postFacebookStatus");

        if (result.hasErrors()) {
            Map<String, Object> params = new HashMap<String, Object>();

            params.put("facebookModel", facebookModel);

            return new ModelAndView("index", params);
        }

        facebookRepository.saveAndFlush(facebookModel);

        logger.debug("EXITING postFacebookStatus");

        return new ModelAndView("redirect:/index.html");
    }
}

脸书模特

package adam.social.media.model;

import java.io.Serializable;
import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

import org.apache.log4j.Logger;

@Entity(name = "FacebookPosts")
public class FacebookModel implements Serializable {

    private static final long serialVersionUID = -1L;

    private static Logger logger = Logger.getLogger(FacebookModel.class.getName());

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;
    @Column(name = "post_id", nullable = false)
    private String postId;
    @Column(name = "to", nullable = false)
    private String to;
    @Column(name = "from", nullable = false)
    private String from;
    @Column(name = "created_time", nullable = false)
    private Date createdTime;
    @Column(name = "updated_time", nullable = false)
    private Date updatedTime;
    @Column(name = "message", nullable = false)
    private String message;
    @Column(name = "picture_url", nullable = false)
    private String pictureUrl;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        logger.debug("ENTERING setId");

        this.id = id;

        logger.debug("EXITING setId");
    }

    public String getPostId() {
        return postId;
    }

    public void setPostId(String postId) {
        logger.debug("ENTERING setPostId");

        this.postId = postId;

        logger.debug("EXITING setPostId");
    }

    public String getTo() {
        return to;
    }

    public void setTo(String to) {
        logger.debug("ENTERING setTo");

        this.to = to;

        logger.debug("EXITING setTo");
    }

    public String getFrom() {
        return from;
    }

    public void setFrom(String from) {
        logger.debug("ENTERING setFrom");

        this.from = from;

        logger.debug("EXITING setFrom");
    }

    public Date getCreatedTime() {
        return createdTime;
    }

    public void setCreatedTime(Date createdTime) {
        logger.debug("ENTERING setCreatedTime");

        this.createdTime = createdTime;

        logger.debug("EXITING setCreatedTime");
    }

    public Date getUpdatedTime() {
        return updatedTime;
    }

    public void setUpdatedTime(Date updatedTime) {
        logger.debug("ENTERING setUpdatedTime");

        this.updatedTime = updatedTime;

        logger.debug("EXITING setUpdatedTime");
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        logger.debug("ENTERING setMessage");

        this.message = message;

        logger.debug("EXITING setMessage");
    }

    public String getPictureUrl() {
        return pictureUrl;
    }

    public void setPictureUrl(String pictureUrl) {
        logger.debug("ENTERING setPictureUrl");

        this.pictureUrl = pictureUrl;

        logger.debug("EXITING setPictureUrl");
    }

    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result
                + ((createdTime == null) ? 0 : createdTime.hashCode());
        result = prime * result + ((from == null) ? 0 : from.hashCode());
        result = prime * result + id;
        result = prime * result + ((message == null) ? 0 : message.hashCode());
        result = prime * result
                + ((pictureUrl == null) ? 0 : pictureUrl.hashCode());
        result = prime * result + ((postId == null) ? 0 : postId.hashCode());
        result = prime * result + ((to == null) ? 0 : to.hashCode());
        result = prime * result
                + ((updatedTime == null) ? 0 : updatedTime.hashCode());
        return result;
    }

    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        FacebookModel other = (FacebookModel) obj;
        if (createdTime == null) {
            if (other.createdTime != null) {
                return false;
            }
        } else if (!createdTime.equals(other.createdTime)) {
            return false;
        }
        if (from == null) {
            if (other.from != null) {
                return false;
            }
        } else if (!from.equals(other.from)) {
            return false;
        }
        if (id != other.id) {
            return false;
        }
        if (message == null) {
            if (other.message != null) {
                return false;
            }
        } else if (!message.equals(other.message)) {
            return false;
        }
        if (pictureUrl == null) {
            if (other.pictureUrl != null) {
                return false;
            }
        } else if (!pictureUrl.equals(other.pictureUrl)) {
            return false;
        }
        if (postId == null) {
            if (other.postId != null) {
                return false;
            }
        } else if (!postId.equals(other.postId)) {
            return false;
        }
        if (to == null) {
            if (other.to != null) {
                return false;
            }
        } else if (!to.equals(other.to)) {
            return false;
        }
        if (updatedTime == null) {
            if (other.updatedTime != null) {
                return false;
            }
        } else if (!updatedTime.equals(other.updatedTime)) {
            return false;
        }
        return true;
    }

    public String toString() {
        return "FacebookModel [id=" + id + ", postId=" + postId + ", to=" + to
                + ", from=" + from + ", createdTime=" + createdTime
                + ", updatedTime=" + updatedTime + ", message=" + message
                + ", pictureUrl=" + pictureUrl + "]";
    }   
}

Facebook 存储库

package adam.social.media.repository;

import org.springframework.data.jpa.repository.JpaRepository;

import adam.social.media.model.FacebookModel;

public interface FacebookRepository extends JpaRepository<FacebookModel, Integer> {

}

index.jsp

<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>

<head>
    <title>Social Media</title>
</head>
<body>
    <form:form method="POST" commandName="facebookModel">
        <form:hidden path="id" />   
        <form:hidden path="postId" />   
        <form:hidden path="to" />   
        <form:hidden path="from" /> 
        <form:hidden path="createdTime" />  
        <form:hidden path="updatedTime" />  
        <form:hidden path="message" />  
        <form:hidden path="pictureUrl" />   

        <input name="submit" type="submit" value="Save" />
    </form:form>
</body>

mvc-context.xml

<?xml version="1.0" encoding="UTF-8"?>  
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context 
                           http://www.springframework.org/schema/context/spring-context.xsd
                           http://www.springframework.org/schema/mvc
                           http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <context:property-placeholder location="classpath:application.properties" />    
    <context:component-scan base-package="adam.social.media" />

    <mvc:annotation-driven />
    <mvc:view-controller path="/index.html" />

    <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource"
        p:basename="messages"/>

    <bean id="connectionFactoryLocator" class="org.springframework.social.connect.support.ConnectionFactoryRegistry">
        <property name="connectionFactories">
            <list>
                <bean class="org.springframework.social.facebook.connect.FacebookConnectionFactory">
                    <constructor-arg value="1054655621213643" />
                    <constructor-arg value="45c95ab39369187fa11b4272632ea4c7" />                
                </bean>
            </list>
        </property>
    </bean>

    <mvc:interceptors>    
        <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"
            p:paramName="locale" />
    </mvc:interceptors>

    <bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver" />

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix"><value>/WEB-INF/jsp/</value></property>
        <property name="suffix"><value>.jsp</value></property>
    </bean> 
</beans>

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>adam.social.media</groupId>
    <artifactId>SocialMedia</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>Social Media</name>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.0.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>4.0.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.1.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>4.1.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.social</groupId>
            <artifactId>spring-social-core</artifactId>
            <version>1.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.social</groupId>
            <artifactId>spring-social-facebook</artifactId>
            <version>2.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.social</groupId>
            <artifactId>spring-social-web</artifactId>
            <version>1.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>1.6.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>4.3.5.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>5.0.1.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.0-api</artifactId>
            <version>1.0.1.Final</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>1.1.0.Final</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
        </dependency>
        <dependency>
            <groupId>org.xerial</groupId>
            <artifactId>sqlite-jdbc</artifactId>
            <version>3.7.2</version>
        </dependency>
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.2.2</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>SocialMedia</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.0</version>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.mortbay.jetty</groupId>
                <artifactId>maven-jetty-plugin</artifactId>
                <version>6.1.10</version>
            </plugin>
        </plugins>
  </build>
</project>

提前致谢！

亚当

Answer 1

from 是一个 reserved word in SQLite。您可以使用不同的名称（如果可能）或引用链接中提到的 url:

If you want to use a keyword as a name, you need to quote it. There are four ways of quoting keywords in SQLite:

• 'keyword' - A keyword in single quotes is a string literal.
• "keyword" - A keyword in double-quotes is an identifier.
• [keyword] - A keyword enclosed in square brackets is an identifier. This is not standard SQL. This quoting mechanism is used by MS Access and SQL Server and is included in SQLite for compatibility.
• `keyword` - A keyword enclosed in grave accents (ASCII code 96) is an identifier. This is not standard SQL. This quoting mechanism is used by MySQL and is included in SQLite for compatibility.

根据 JPA spec（您需要接受他们的许可协议），似乎更喜欢使用双引号：

@Column(name = "\"from\"", nullable = false)
private String from;

比照。 了解更多（特定于 Hibernate 和 HSQL 的）详细信息。