org.hibernate.engine.jdbc.spi.SqlExceptionHelper-在此«ResultSet»中没有名称为«name»的列Hibernate与PostgreSQL JDBC

Question

正如主题所说，我在带有PostgreSQL DB的Hibernate 5中出现了该错误。

Hibernate返回给我的查询是： SELECT u.email, u.password FROM utenti u WHERE u.email = ? （因此是正确的），该表为：

utenti(email (pk), password, nome, cognome, datanascita, sesso)

而且，我收到另一个错误：异常启动过滤器struts2

Unable to load configuration. - action - file:<path>/NetBeansProjects/DBIIProject/target/DBIIProject-1.0-SNAPSHOT/WEB-INF/classes/struts.xml:15:34

我的struts.xml是：

    <?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>

    <constant name="struts.enable.DynamicMethodInvocation" value="false"/>
    <constant name="struts.devMode" value="true"/>

    <!-- Cambio l'estensione delle Action da .action a .do -->
    <constant name="struts.action.extension" value="do" />

    <package name="default" extends="struts-default" namespace="/">
        <action name="Login" class="org.altervista.cdpjavaexamples.dbiiproject.actions.LoginAction" method="execute">
            <result name="success">index.jsp</result>
            <result name="input">login.jsp</result>
        </action>
        <action name="Logout" class="org.altervista.cdpjavaexamples.dbiiproject.actions.LogoutAction" method="execute">
            <result name="success">index.jsp</result>
        </action>
        <action name="PasswordRecovery" class="org.altervista.cdpjavaexamples.dbiiproject.actions.PasswordRecoveryAction" method="execute">
            <result name="success">password_recovery.jsp</result>
            <result name="input">password_recovery.jsp</result>
        </action>
    </package>
</struts>

我的pom.xml是：

    <?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.altervista.cdpjavaexamples</groupId>
    <artifactId>DBIIProject</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>DBIIProject</name>

    <properties>
        <struts2.version>2.3.24.1</struts2.version>
        <log4j2.version>2.2</log4j2.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts-taglib</artifactId>
            <version>1.3.10</version>
        </dependency>

        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-convention-plugin</artifactId>
            <version>2.3.24.1</version>
        </dependency>

        <dependency>
            <groupId>com.sun.mail</groupId>
            <artifactId>javax.mail</artifactId>
            <version>1.5.5</version>
        </dependency>

        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>javax.mail-api</artifactId>
            <version>1.5.5</version>
        </dependency>

        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>9.4.1207.jre7</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.0.7.Final</version>
        </dependency>

        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-core</artifactId>
            <version>${struts2.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-junit-plugin</artifactId>
            <version>${struts2.version}</version>
            <scope>test</scope>
        </dependency>


        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>${log4j2.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>${log4j2.version}</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.8.2</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.4</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.3</version>
                <configuration>
                    <encoding>UTF-8</encoding>
                    <source>1.5</source>
                    <target>1.5</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.mortbay.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>8.1.16.v20140903</version>
                <configuration>
                    <stopKey>CTRL+C</stopKey>
                    <stopPort>8999</stopPort>
                    <systemProperties>
                        <systemProperty>
                            <name>xwork.loggerFactory</name>
                            <value>com.opensymphony.xwork2.util.logging.log4j2.Log4j2LoggerFactory</value>
                        </systemProperty>
                    </systemProperties>
                    <scanIntervalSeconds>10</scanIntervalSeconds>
                    <webAppSourceDirectory>${basedir}/src/main/webapp/</webAppSourceDirectory>
                    <webAppConfig>
                        <descriptor>${basedir}/src/main/webapp/WEB-INF/web.xml</descriptor>
                    </webAppConfig>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

最后，我的Hibernate文件是：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
    <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
    <property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/testdb</property>
    <property name="hibernate.connection.username">test</property>
    <property name="hibernate.connection.password">test</property>
    <property name="hibernate.show_sql">true</property>
    <mapping class="" file="" jar="" package="" resource="org/altervista/cdpjavaexamples/dbiiproject/model/Utenti.hbm.xml"/>
  </session-factory>
</hibernate-configuration>

和：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
  <!-- Mappatura classe - tabella -->
  <class name="org.altervista.cdpjavaexamples.dbiiproject.model.Utenti" table="utenti">
    <meta attribute="class-description">
          Descrizione della classe
      </meta>
    <!-- Chiave primaria -->
    <id column="email" name="email" type="text"/>
    <!-- Campi -->
    <property column="nome" name="nome" not-null="true" type="text"/>
    <property column="cognome" name="cognome" not-null="true" type="text"/>
    <property column="password" name="password" not-null="true" type="text"/>
    <property column="sesso" name="sesso" not-null="true" type="boolean"/>
    <property column="datanascita" name="dataNascita" not-null="true" type="date"/>
  </class>

  <!-- Query -->
  <sql-query name="selectEmailPassword">
      <return class="org.altervista.cdpjavaexamples.dbiiproject.model.Utenti"/>
      <![CDATA[
        SELECT email, password FROM utenti WHERE email = :email
      ]]>
  </sql-query>
  <sql-query name="selectNomeCognomePassword">
      <return class="org.altervista.cdpjavaexamples.dbiiproject.model.Utenti"/>
      <![CDATA[
        SELECT nome, cognome, password FROM utenti WHERE email = :email
      ]]>
  </sql-query>
  <sql-query name="emailExists">
      <return class="org.altervista.cdpjavaexamples.dbiiproject.model.Utenti"/>
      <![CDATA[
        SELECT * FROM utenti WHERE email = :email
      ]]>
  </sql-query>
  <!-- Fine query -->
</hibernate-mapping>

我已经在论坛中进行搜索，但是找到的解决方案并不能解决我的问题。

Answer 1

您定义<return class="org.altervista.cdpjavaexamples.dbiiproject.model.Utenti"/> ，看起来该类具有name属性（例如，标记为使用的“ name”列）。 当执行SQL时，hibernate尝试填充实体，但是ResultSet没有用于填充名称的列。

Answer 2

您已经在Hibernate映射中使用<sql-query>使用了本机SQL查询。 这些查询必须使用特定于可以在其上执行该查询的数据库的本地SQL方言。 因此，如果您在SQL代码中出错或更改了数据库，则查询可能无法正常工作。 在代码中使用本机SQL查询是没有意义的，应该将它们替换为命名查询 。

可以使用<query>节点配置使用映射文档。 如果查询中包含可以解释为标记的字符，请记住使用CDATA部分。

这是此类查询的示例

<query name="selectEmailPassword"><![CDATA[
    from org.altervista.cdpjavaexamples.dbiiproject.model.Utenti as u
    WHERE u.email = :email
]]></query> 

参数绑定

Query q = sess.getNamedQuery("selectEmailPassword");
q.setString("email", email);
List<Utenti> l = q.list();

Answer 3

谢谢大家。 最后，我使用Criteria对象执行查询。