hibernate - 使用 Spring MVC + Hibernate + PostGreSQL 连接的用户登录页面

Question

我试图使用 spring mvc + hibernate + postgresql 连接设置登录页面。经过几次点击和运行，下面的代码运行良好。我在设置时遇到了几个问题。来自@M 的评论。Deinum 帮助我完成了这项工作。他在回复我之前的问题时发布的一些有用材料也帮助我理解了 spring mvc + hibernate 概念。所以有问题的人可以参考下面的代码。只是分享给大家参考。

我的调度程序 servlet 文件是

    <?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"

             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xmlns:beans="http://www.springframework.org/schema/beans"
             xmlns:context="http://www.springframework.org/schema/context"
             xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/cache"
             xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        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/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd">

    <!-- DispatcherServlet Context: defines this servlet's request-processing
        infrastructure -->

    <!-- Enables the Spring MVC @Controller programming model <mvc:annotation-driven /> -->
    <annotation-driven/>


    <tx:annotation-driven transaction-manager="transactionManager"/>


    <!-- Resolves views selected for rendering by @Controllers to .jsp resources
        in the /WEB-INF/views directory -->
    <beans:bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <beans:property name="prefix" value="/WEB-INF/pages/"/>
        <beans:property name="suffix" value=".jsp"/>
    </beans:bean>


     <beans:bean id="userValidator" class="com.springapp.mvc.validator.UserValidator"/>

        <!--Data source has the database information -->
     <beans:bean id="dataSource"
                class="org.springframework.jdbc.datasource.DriverManagerDataSource">
         <beans:property name="driverClassName" value="${jdbc.driverClassName}"/>
         <beans:property name="url" value="${jdbc.url}"/>
         <beans:property name="username" value="${jdbc.username}"/>
          <beans:property name="password" value="${jdbc.password}"/>
        </beans:bean>

        <!-- SessonFactory for Hibernate -->
        <beans:bean id="sessionFactory"
                class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
            <beans:property name="dataSource" ref="dataSource"/>
        <beans:property name="packagesToScan" value="com.springapp.mvc.domain"/>
        <beans:property name="hibernateProperties">
            <beans:props>
                <beans:prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</beans:prop>
                <beans:prop key="hibernate.max_fetch_depth">3</beans:prop>
                <beans:prop key="hibernate.jdbc.fetch_size">50</beans:prop>
                <beans:prop key="hibernate.jdbc.batch_size">10</beans:prop>
                <beans:prop key="hibernate.show_sql">true</beans:prop>
            </beans:props>
        </beans:property>
    </beans:bean>


 <!-- Transaction Manager -->
 <beans:bean id="transactionManager"
             class="org.springframework.orm.hibernate4.HibernateTransactionManager">
     <beans:property name="sessionFactory" ref="sessionFactory"/>
 </beans:bean>

 <context:property-placeholder location="/jdbc.properties"/>
 <context:component-scan base-package="com.springapp.mvc"/>

 <!-- bind your messages.properties -->
 <beans:bean class="org.springframework.context.support.ResourceBundleMessageSource"
             id="messageSource">
     <beans:property name="basename" value="locale\messages"/>

     <!-- <beans:property name="fallbackToSystemLocale" value="false" />  -->
 </beans:bean>


</beans:beans>

我的 LoginDao 类文件是

    package com.springapp.mvc.dao;

import com.springapp.mvc.domain.Users;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;

@Transactional
@Repository("LoginDao")
public class LoginDao {


    public SessionFactory getMy_sessionfactory() {
        return my_sessionfactory;
    }

    @Resource(name = "sessionFactory")
    public void setMy_sessionfactory(SessionFactory my_sessionfactory) {
        this.my_sessionfactory = my_sessionfactory;
    }

    private SessionFactory my_sessionfactory;

    public Long findByUname(Users loginForm) {
        System.out.println("Hi Dao" + loginForm.getUname());
        Session session = my_sessionfactory.getCurrentSession();
        String hql = "select count(u.uname) from Users u where u.uname = ? and u.pass = ?";
        Query query = session.createQuery(hql).setString(0, loginForm.getUname()).setString(1, loginForm.getPass());
        System.out.println("query" + query);
        System.out.println("query ur" + query.uniqueResult());

        Long count = (Long) query.uniqueResult();
        return count;
    }


}

我的域类文件是

    package com.springapp.mvc.domain;

import javax.persistence.*;

@Entity
@Table(name = "Users")

public class Users {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "uname")
    private String uname;

    @Column(name = "pass")
    private String pass;


    private Long user_count;

    public String getPass() {
        return pass;
    }

    public void setPass(String pass) {
        this.pass = pass;
    }


    public String getUname() {
        return uname;
    }

    public void setUname(String uname) {
        this.uname = uname;
    }

    public Long getUser_count() {
        return user_count;
    }

    public void setUser_count(Long user_count) {
        this.user_count = user_count;
    }

}

我的控制器类文件是

    package com.springapp.mvc.controller;

import com.springapp.mvc.domain.Users;
import com.springapp.mvc.service.LoginService;
import com.springapp.mvc.validator.UserValidator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/")
public class SigninController {

    @Autowired
    private LoginService lsp;


    @RequestMapping(method = RequestMethod.GET)
    public String printWelcome(ModelMap model) {
        model.addAttribute("message", "Hello world!");
        return "appstore";
    }

    @RequestMapping(value = "/signin", method = RequestMethod.GET)
    public String loginPage(ModelMap model) {
        Users loginForm = new Users();
        model.addAttribute("loginForm", loginForm);
        return "signin";
    }


    @RequestMapping(value = "/loginsuccess", method = RequestMethod.GET)
    public String loginSuccess(@ModelAttribute("loginForm") Users loginObj, ModelMap model, BindingResult result) {
        Long count = this.lsp.validateLogin(loginObj);
        loginObj.setUser_count(count);
        UserValidator userValidator = new UserValidator();
        userValidator.validate(loginObj, result);


        model.addAttribute("message1", loginObj.getUname());
        System.out.println("result error" + result.getAllErrors());
        System.out.println("result error count" + result.getErrorCount());
        if (result.hasErrors()) {
            return "signin";
        } else {
            return "loginsuccess";
        }
    }

我的 POM.xml 文件如下。

    <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>com.springapp</groupId>
    <artifactId>D2DCOMM</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>D2DCOMM</name>


    <properties>
        <java-version>1.7</java-version>
        <org.springframework-version>3.2.0.RELEASE</org.springframework-version>
        <org.aspectj-version>1.6.10</org.aspectj-version>
        <org.slf4j-version>1.6.6</org.slf4j-version>
    </properties>
    <dependencies>
        <!-- Spring -->

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${org.springframework-version}</version>
            <exclusions>
                <!-- Exclude Commons Logging in favor of SLF4j -->
                <exclusion>
                    <groupId>commons-logging</groupId>
                    <artifactId>commons-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>net.sf.ehcache</groupId>
            <artifactId>ehcache-core</artifactId>
            <version>2.6.6</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${org.springframework-version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.openejb</groupId>
            <artifactId>commons-dbcp-all</artifactId>
            <version>1.3-r699049</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-core</artifactId>
            <version>2.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-sftp</artifactId>
            <version>2.2.2.RELEASE</version>
        </dependency>

        <!-- AspectJ -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>${org.aspectj-version}</version>
        </dependency>

        <!-- Jackson -->
        <dependency>
            <groupId>com.fasterxml.jackson.jaxrs</groupId>
            <artifactId>jackson-jaxrs-json-provider</artifactId>
            <version>2.1.4</version>
        </dependency>

        <!-- Logging -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${org.slf4j-version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>${org.slf4j-version}</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${org.slf4j-version}</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.15</version>
            <exclusions>
                <exclusion>
                    <groupId>javax.mail</groupId>
                    <artifactId>mail</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>javax.jms</groupId>
                    <artifactId>jms</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.sun.jdmk</groupId>
                    <artifactId>jmxtools</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.sun.jmx</groupId>
                    <artifactId>jmxri</artifactId>
                </exclusion>
            </exclusions>
            <scope>runtime</scope>
        </dependency>

        <!-- @Inject -->
        <dependency>
            <groupId>javax.inject</groupId>
            <artifactId>javax.inject</artifactId>
            <version>1</version>
        </dependency>

        <!-- Servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>


        <!-- Hibernate -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.1.10.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>4.1.10.Final</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${org.springframework-version}</version>
        </dependency>

        <!-- JDBC -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${org.springframework-version}</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.18</version>
        </dependency>

        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>9.2-1003-jdbc4</version>
        </dependency>

        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>

        <dependency>
            <groupId>javassist</groupId>
            <artifactId>javassist</artifactId>
            <version>3.12.1.GA</version>
        </dependency>
        <!-- Test -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.7</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-eclipse-plugin</artifactId>
                <version>2.9</version>
                <configuration>
                    <additionalProjectnatures>
                        <projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
                    </additionalProjectnatures>
                    <additionalBuildcommands>
                        <buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
                    </additionalBuildcommands>
                    <downloadSources>true</downloadSources>
                    <downloadJavadocs>true</downloadJavadocs>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.5.1</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                    <compilerArgument>-Xlint:all</compilerArgument>
                    <showWarnings>true</showWarnings>
                    <showDeprecation>true</showDeprecation>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.2.1</version>
                <configuration>
                    <mainClass>org.test.int1.Main</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

我的验证器类

    package com.springapp.mvc.validator;

import com.springapp.mvc.domain.Users;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

public class UserValidator implements Validator {
    @Override
    public boolean supports(Class<?> clazz) {
        return Users.class.isAssignableFrom(clazz);

    }

    @Override
    public void validate(Object obj, Errors errors) {
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "uname", "Empty.UsersName");
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "pass", "Empty.UsersPass");
        Users user = (Users) obj;
        System.out.println("count from validator!!!!!" + user.getUser_count());
        if (user.getUser_count() > 0) {

        } else {
            errors.reject("User.Details.Mismatch");
        }
    }

}

我的 messages_en_US_properties 文件位于 (src/main/resources/locale/messages_en_US_properties) 文件如下

Empty.UsersName = User Name is required!
Empty.UsersPass = Password is required!
User.Details.Mismatch  = No user details found.Please sign up.

我的 jdbc_properties 文件

jdbc.driverClassName=org.postgresql.Driver
jdbc.url=jdbc:postgresql://localhost:5432/postgres
jdbc.username=postgr
jdbc.password=postgr

score 4 · Accepted Answer

有几件事。

@Transactional
@Repository("LoginDao")
public class LoginDao {
public void findByUname(Users loginForm) {
    System.out.println("Hi Dao" + loginForm.getUname());
    Session session = my_sessionfactory.getCurrentSession();
    Query query =  session.getNamedQuery("loginUser.findByUname").setString("userid", loginForm.getUname());
   Users loginObj = (Users)session.getNamedQuery("Users.findByUname").setParameter("id", loginForm.getUname());
           // getNamedQuery("loginUser.findByUname").setParameter("id", loginForm.getUname()).uniqueResult();

}

首先，您LoginDao没有my_sessionfactory至少在您显示的代码中没有命名的字段。接下来没有名为loginUser.findByUname的命名查询，有一个Users.findByUname查询。最后，您尝试将其强制Query转换为一个Users对象，该对象永远不会起作用

如下更改 dao（我还假设您想返回结果）。

@Transactional
@Repository("LoginDao")
public class LoginDao {

    @Autowired
    private SessionFactory sessionFactory;

    public Users findByUname(Users loginForm) {
        System.out.println("Hi Dao" + loginForm.getUname());
        Session session = sessionFactory.getCurrentSession();
        Query query =  session.getNamedQuery("Users.findByUname");
        query.setString("userid", loginForm.getUname());
        query.setString("password", loginForm.getPassword());
        Users loginObj = (Users) query.uniqueResult();
        return loginObj;
    }   
}

您使用的命名查询必须是 HQL 查询而不是 SQL 查询，因此您需要重写查询以包含属性名称而不是列名称。

验证是错误的，只需BindingResult在您的方法签名中包含 a 并将其传递给验证器。也不要将用户对象添加到模型中，它已经存在。

@Controller
@RequestMapping("/")
public class SigninController {

@Autowired
private LoginService lsp;

  @RequestMapping(value = "/loginsuccess", method = RequestMethod.GET)
  public String loginSuccess(@ModelAttribute("loginForm") Users loginObj, BindingResult result, ModelMap model) {
      UserValidator userValidator = new UserValidator();
  userVaidator.validate(result, loginObj);          

      Long count = this.lsp.validateLogin(loginObj);
      model.addAttribute("message1", loginObj.getUname());
      System.out.println("result error"+result.getAllErrors());
      System.out.println("result error count"+result.getErrorCount());
      if (result.hasErrors()) {
          return "signin";
      } else {
          return "loginsuccess";
      }
  }

另一种解决方案是将验证器添加到活页夹（这允许您简单地添加 @Valid 注释，spring 将为您进行验证）。为此，添加一个使用 @InitBinder 注释的方法并添加验证器。

@Controller
@RequestMapping("/")
public class SigninController {

    @Autowired
    private LoginService lsp;

    @RequestMapping(value = "/loginsuccess", method = RequestMethod.GET)
    public String loginSuccess(@ModelAttribute("loginForm") @Valid Users loginObj, BindingResult result, ModelMap model) {
        Long count = this.lsp.validateLogin(loginObj);
        model.addAttribute("message1", loginObj.getUname());
        System.out.println("result error"+result.getAllErrors());
        System.out.println("result error count"+result.getErrorCount());
        if (result.hasErrors()) {
            return "signin";
        } else {
            return "loginsuccess";
        }
    }

    @InitBinder
    public void initBinder(WebDataBinder binder) {
        binder.setValidator(new UserValidator());
    }
}

关于错误密码的验证，您应该将密码放入查询中，并使用用户名/密码作为查询的一部分检索对象。

hibernate - 使用 Spring MVC + Hibernate + PostGreSQL 连接的用户登录页面

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