基于MVC架构，JavaFX与Spring整合

末蓝、 2022-05-21 05:29 395阅读 0赞

探究了几天JavaFX，，因为它自身的一些优点，觉得JavaFX在将来的开发中会发展起来的。选择JavaFX因为自己本身Javaer，JavaFX的学习成本不高。而JavaFX跟MVC的开发有点像，同样可以将视图、模型、和控制器分开。对于JavaFX的UI表现我觉得算是Java里面自由性最好的。

JavaFX从08年到现在也差不多10年，虽然2.0版本后有很大的变化，在国内的教程更新地慢。找了几天JavaFX的资料，国内的资料真的少，而且大多是翻译官方的。

JavaFX可以整合spring，而spring可以整合数据库的操作，并且可以使用spring实现一些基础功能。现在将工程目录架构整理如下：

使用maven管理，

java文件夹的包有controller、dao、entity、service、还有一个util工具包和Main.java作为程序主入口。

![70][]

resources文件夹中有config（spring配置文件）、css（样式文件）、fxml（场景的fxml文件）、i18n（国际化资源文件）

![70 1][]

util工具包包含一些工具类，在这里主要实现的功能是FXML加载，JSR303验证和获取国际化资源。

![70 2][]

下面来说说功能的实现，首先看看spring的配置文件spring-config.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:tx="http://www.springframework.org/schema/tx"
           xmlns:aop="http://www.springframework.org/schema/aop"
           xmlns:jpa="http://www.springframework.org/schema/data/jpa"
           xmlns:context="http://www.springframework.org/schema/context"
           xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans.xsd
           http://www.springframework.org/schema/tx
           http://www.springframework.org/schema/tx/spring-tx.xsd
           http://www.springframework.org/schema/aop
           http://www.springframework.org/schema/aop/spring-aop.xsd
           http://www.springframework.org/schema/data/jpa
           http://www.springframework.org/schema/data/jpa/spring-jpa.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context.xsd">
    
        
        <context:component-scan base-package="com.cjx913.al.controller"/>
        <context:component-scan base-package="com.cjx913.al.service"/>
        <context:component-scan base-package="com.cjx913.al.util"/>
    
        
        <context:property-placeholder location="classpath:/config/database.properties"/>
        
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="driverClass" value="${mysql.driver}"/>
            <property name="jdbcUrl" value="${mysql.url}"/>
            <property name="user" value="${mysql.username}"/>
            <property name="password" value="${mysql.password}"/>
            <property name="initialPoolSize" value="${connection_pools.initial_pool_size}"/>
            <property name="minPoolSize" value="${connection_pools.min_pool_size}"/>
            <property name="maxPoolSize" value="${connection_pools.max_pool_size}"/>
            <property name="maxIdleTime" value="${connection_pools.max_idle_time}"/>
            <property name="acquireIncrement" value="${connection_pools.acquire_increment}"/>
            <property name="checkoutTimeout" value="${connection_pools.checkout_timeout}"/>
        </bean>
    
    
    
        
        
        <bean id="entityManagerFactory"
              class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
            
            <property name="dataSource" ref="dataSource"/>
            
            <property name="packagesToScan" value="com.cjx913.al.entity"/>
            
            <property name="persistenceProvider">
                <bean class="org.hibernate.jpa.HibernatePersistenceProvider"/>
            </property>
            
            <property name="jpaVendorAdapter">
                <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
                    
                    <property name="database" value="MYSQL"/>
                    <property name="generateDdl" value="false"/>
                    <property name="databasePlatform" value="${hibernate.dialect}"/>
                    <property name="showSql" value="true"/>
                    <property name="prepareConnection" value="true"/>
                </bean>
            </property>
            
            <property name="jpaDialect">
                <bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect"/>
            </property>
            
            <property name="jpaPropertyMap">
                <map>
                    <entry key="hibernate.show_sql" value="${hibernate.show_sql}"/>
                    <entry key="hibernate.format_sql" value="${hibernate.format_sql}"/>
                    <entry key="hibernate.hbm2ddl.auto" value="${hibernate.hbm2ddl.auto}"/>
                    <entry key="hibernate.query.substitutions" value="${hibernate.query.substitutions}"/>
                    <entry key="hibernate.default_batch_fetch_size" value="${hibernate.default_batch_fetch_size}"/>
                    <entry key="hibernate.max_fetch_depth" value="${hibernate.max_fetch_depth}"/>
                    <entry key="hibernate.generate_statistics" value="${hibernate.generate_statistics}"/>
                    <entry key="hibernate.bytecode.use_reflection_optimizer"
                           value="${hibernate.bytecode.use_reflection_optimizer}"/>
                    <entry key="hibernate.cache.use_second_level_cache" value="${hibernate.cache.use_second_level_cache}"/>
                    <entry key="hibernate.cache.use_query_cache" value="${hibernate.cache.use_query_cache}"/>
                    <entry key="hibernate.current_session_context_class"
                           value="${hibernate.current_session_context_class}"/>
                    <entry key="javax.persistence.validation.mode" value="${javax.persistence.validation.mode}"/>
                </map>
            </property>
        </bean>
    
        
        <jpa:repositories base-package="com.cjx913.al.dao"
                          repository-impl-postfix="Impl"
                          entity-manager-factory-ref="entityManagerFactory"
                          transaction-manager-ref="transactionManager"/>
    
        
        <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
            <property name="entityManagerFactory" ref="entityManagerFactory"/>
        </bean>
    
        
        <tx:annotation-driven transaction-manager="transactionManager"/>
    
        
        <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
            <property name="basenames">
                <list>
                    
                    <value>classpath:/i18n/validation_messages</value>
                    <value>classpath:/i18n/ui_main</value>
                    <value>classpath:/i18n/ui_login</value>
                    <value>classpath:/i18n/ui_register</value>
                </list>
            </property>
            <property name="fileEncodings" value="utf-8"/>
        </bean>
        <bean id="resourceBundle" class="org.springframework.context.support.MessageSourceResourceBundle" >
            <constructor-arg name="source" ref="messageSource"/>
            <constructor-arg name="locale" >
                <bean class="java.util.Locale" factory-method="getDefault"/>
            </constructor-arg>
        </bean>
    
    
        
        <bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
            
            <property name="providerClass" value="org.hibernate.validator.HibernateValidator"/>
            
            <property name="validationMessageSource" ref="messageSource"/>
        </bean>
    
    </beans>

i18n类的实现，主要是在spring配置实现对资源文件的引用，可以通过getMessage（String s）获取资源信息

package com.cjx913.al.util;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.context.MessageSource;
    import org.springframework.context.MessageSourceResolvable;
    import org.springframework.stereotype.Component;
    
    import java.util.Locale;
    import java.util.ResourceBundle;
    
    @Component
    public class I18n {
    
        @Autowired
        private ResourceBundle resourceBundle;
    
        public ResourceBundle getResourceBundle() {
            return resourceBundle;
        }
    
        public String getMessage(String s){
            return this.resourceBundle.getString(s);
        }
    }

Jsr303Validation类的实现，依赖于spring配置的validator，重写了验证方法，返回字段名和错误信息映射的Map

package com.cjx913.al.util;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
    
    import javax.validation.ConstraintViolation;
    import javax.validation.Validator;
    import java.util.HashMap;
    import java.util.Iterator;
    import java.util.Map;
    import java.util.Set;
    
    @Component
    public class Jsr303Validator {
    
        @Autowired
        private Validator validator;
    
        public Validator getValidator() {
            return validator;
        }
    
        /**
         * @param t   需要校检的对象
         * @param <T>
         * @return 错误字段和信息的映射
         */
        public <T> Map <String, String> validated(T t, Class <?>... groups) {
    //        t爲空，返回null
            if (t == null) {
                return null;
            }
    //        对t进行校验
            Set <ConstraintViolation <T>> violations = validator.validate(t, groups);
    //        校检内有错误
            return getFieldErrorMap(violations);
        }
    
        public <T> Map <String, String> validated(T t, String propertyName, Class <?>... groups) {
    //        t爲空，返回null
            if (propertyName == null || t == null) {
                return null;
            }
    //        对t进行校验
            Set <ConstraintViolation <T>> violations = validator.validateProperty(t, propertyName, groups);
    
            return getFieldErrorMap(violations);
        }
    
        public <T> Map <String, String> validated(Class <T> beanType, String propertyName, Object value, Class <?>... groups) {
    //        t爲空，返回null
            if (propertyName == null || value == null) {
                return null;
            }
    //        对t进行校验
            Set <ConstraintViolation <T>> violations = validator.validateValue(beanType, propertyName, value, groups);
    
            return getFieldErrorMap(violations);
        }
    
        private <T> Map <String, String> getFieldErrorMap(Set <ConstraintViolation <T>> violations) {
    
            Map <String, String> map = null;
            //        校检内有错误
            if (violations.size() == 0) {
                return null;
            } else {
                map = new HashMap <>();
    //        保存错误信息：Map<Field,Message>
                Iterator <ConstraintViolation <T>> iterator = violations.iterator();
                ConstraintViolation <T> violation = null;
    //            遍历校验信息
                while (iterator.hasNext()) {
                    violation = iterator.next();
                    String field = violation.getPropertyPath().toString();
                    String message = violation.getMessage();
                    map.put(field, message);
                }
                return map;
            }
        }
    }

**重点是SpringFXMLLoader的实现**

package com.cjx913.al.util;
    
    import com.cjx913.al.Main;
    import javafx.fxml.FXMLLoader;
    import javafx.scene.Node;
    import javafx.util.BuilderFactory;
    import javafx.util.Callback;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import org.springframework.context.support.MessageSourceResourceBundle;
    import org.springframework.stereotype.Component;
    
    import java.awt.*;
    import java.io.IOException;
    import java.io.InputStream;
    import java.net.URL;
    import java.nio.charset.Charset;
    import java.util.LinkedList;
    import java.util.PropertyResourceBundle;
    import java.util.ResourceBundle;
    
    @Component
    public class SpringFxmlLoader extends FXMLLoader {
        
    
        @Autowired
        private ResourceBundle resourceBundle;
    
    
        public <T extends Node> T load(String url) {
            try (InputStream fxmlStream = getClass().getResourceAsStream(url)) {
                super.setLocation(this.getClass().getClassLoader().getResource("/"));
                super.setResources(resourceBundle);
                super.setControllerFactory(new Callback <Class <?>, Object>() {
                    @Override
                    public Object call(Class <?> clazz) {

return Main.APPLICATION_CONTEXT.getBean(clazz);

\} \}); return this.load(fxmlStream); \} catch (IOException ioException) \{ throw new RuntimeException(ioException); \} \}\}

FXMLLoader对象的需要调用setResource()绑定资源，可以在fxml使用%实现国际化的目的，而参数可以通过spring注解注入、setLocation()设至基本路径，方便fxml中css和fxml和其他文件导入、setControllerFactory()使用spring管理的controller。

这是一个普通的Main类用于启动JavaFX程序和spring

package com.cjx913.al;
    
    import com.cjx913.al.util.SpringFxmlLoader;
    import javafx.application.Application;
    import javafx.scene.Scene;
    import javafx.scene.layout.BorderPane;
    import javafx.stage.Stage;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class Main extends Application {
        public static final ApplicationContext APPLICATION_CONTEXT = new ClassPathXmlApplicationContext("/config/spring-config.xml");
    
    
        public static void main(String[] args){
            launch(args);
        }
    
        @Override
        public void start(Stage primaryStage) throws Exception {
            SpringFxmlLoader springFxmlLoader = Main.APPLICATION_CONTEXT.getBean(SpringFxmlLoader.class);
            BorderPane root = springFxmlLoader.load("/fxml/main.fxml");
            Scene scene = new Scene(root);
            primaryStage.setScene(scene);
            primaryStage.show();
        }
    }
    public static final ApplicationContext APPLICATION_CONTEXT
                = new ClassPathXmlApplicationContext("/config/spring-config.xml");
    
    
        public static void main(String[] args){
            launch(args);
        }
    
        @Override
        public void start(Stage primaryStage) throws Exception {
            SpringFxmlLoader springFxmlLoader = Main.APPLICATION_CONTEXT.getBean(SpringFxmlLoader.class);
            BorderPane root = springFxmlLoader.load("/fxml/main.fxml");
            Scene scene = new Scene(root);
            primaryStage.setScene(scene);
            primaryStage.show();
        }
    }

BaseController的实现，用于被其他controller类继承，获取一些公共的方法，在controller类中使用@Controller注解

package com.cjx913.al.controller;
    
    import com.cjx913.al.util.I18n;
    import com.cjx913.al.util.Jsr303Validator;
    import com.cjx913.al.util.SpringFxmlLoader;
    import javafx.fxml.Initializable;
    import org.springframework.beans.factory.annotation.Autowired;
    
    public abstract class BaseController implements Initializable {
        @Autowired
        private SpringFxmlLoader springFxmlLoader;
        @Autowired
        private I18n i18n;
        @Autowired
        private Jsr303Validator jsr303Validator;
    
        public SpringFxmlLoader getSpringFxmlLoader() {
            return springFxmlLoader;
        }
    
        public I18n getI18n() {
            return i18n;
        }
    
        public Jsr303Validator getJsr303Validator() {
            return jsr303Validator;
        }
    }

尽可能减少java代码创建容器、控件等，应该使用fxml创建用户界面

关于fxml的使用，还有数据绑定下次再写

[70]: /images/20220521/cccde07e0839489f8243ac6c835a9fd4.png
[70 1]: /images/20220521/bae060cd0dc24ee18a937380fa6d67eb.png
[70 2]: /images/20220521/bcec0cb9a7c9454e9ad842f56a0489f7.png