Struts 2 + Hibernate + Spring 开发环境的搭建与数据访问Dao的生成

女爷i 2022-06-08 13:16 129阅读 0赞

\#SSH环境框架的搭建,网上也有很多教程,但与个人操作的出入很多,这里也做一篇属于个人的教程.教程如图所示:

1.搭建Spring框架

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2.搭建Hibernate框架

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3.搭建Struts 2框架

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4.至此,SSH三大开发框架环境顺利搭建

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5.但该框架有很多敏捷开发的环境还没有搭建,如反向工程建立数据模型类和数据访问层Dao模型类,可以不用写SQL语句

\# 进入MyEclipse Database Explorer视图窗口

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生成的代码如下:

User.java

package com.sunline.entity;
    
    /**
     * User entity. @author MyEclipse Persistence Tools
     */
    
    public class User implements java.io.Serializable {
    
    	// Fields
    
    	private Integer userId;
    	private String userName;
    	private String userPassword;
    	private String userStatus;
    
    	// Constructors
    
    	/** default constructor */
    	public User() {
    	}
    
    	/** full constructor */
    	public User(String userName, String userPassword, String userStatus) {
    		this.userName = userName;
    		this.userPassword = userPassword;
    		this.userStatus = userStatus;
    	}
    
    	// Property accessors
    
    	public Integer getUserId() {
    		return this.userId;
    	}
    
    	public void setUserId(Integer userId) {
    		this.userId = userId;
    	}
    
    	public String getUserName() {
    		return this.userName;
    	}
    
    	public void setUserName(String userName) {
    		this.userName = userName;
    	}
    
    	public String getUserPassword() {
    		return this.userPassword;
    	}
    
    	public void setUserPassword(String userPassword) {
    		this.userPassword = userPassword;
    	}
    
    	public String getUserStatus() {
    		return this.userStatus;
    	}
    
    	public void setUserStatus(String userStatus) {
    		this.userStatus = userStatus;
    	}
    
    }

User.hbm.xml

<?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>
        <class name="com.sunline.entity.User" table="user" catalog="hengfeng">
            <id name="userId" type="java.lang.Integer">
                <column name="user_id" />
                <generator class="native"></generator>
            </id>
            <property name="userName" type="java.lang.String">
                <column name="user_name" length="40" not-null="true" />
            </property>
            <property name="userPassword" type="java.lang.String">
                <column name="user_password" length="30" not-null="true" />
            </property>
            <property name="userStatus" type="java.lang.String">
                <column name="user_status" length="30" not-null="true" />
            </property>
        </class>
    </hibernate-mapping>

UserDAO.java(自动生成的数据操作类,不用自己写SQL语句啦)

package com.sunline.entity;
    
    import java.util.List;
    import org.hibernate.LockMode;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.context.ApplicationContext;
    import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
    
    /**
     * A data access object (DAO) providing persistence and search support for User
     * entities. Transaction control of the save(), update() and delete() operations
     * can directly support Spring container-managed transactions or they can be
     * augmented to handle user-managed Spring transactions. Each of these methods
     * provides additional information for how to configure it for the desired type
     * of transaction control.
     * 
     * @see com.sunline.entity.User
     * @author MyEclipse Persistence Tools
     */
    
    public class UserDAO extends HibernateDaoSupport {
    	private static final Logger log = LoggerFactory.getLogger(UserDAO.class);
    	// property constants
    	public static final String USER_NAME = "userName";
    	public static final String USER_PASSWORD = "userPassword";
    	public static final String USER_STATUS = "userStatus";
    
    	protected void initDao() {
    		// do nothing
    	}
    
    	public void save(User transientInstance) {
    		log.debug("saving User instance");
    		try {
    			getHibernateTemplate().save(transientInstance);
    			log.debug("save successful");
    		} catch (RuntimeException re) {
    			log.error("save failed", re);
    			throw re;
    		}
    	}
    
    	public void delete(User persistentInstance) {
    		log.debug("deleting User instance");
    		try {
    			getHibernateTemplate().delete(persistentInstance);
    			log.debug("delete successful");
    		} catch (RuntimeException re) {
    			log.error("delete failed", re);
    			throw re;
    		}
    	}
    
    	public User findById(java.lang.Integer id) {
    		log.debug("getting User instance with id: " + id);
    		try {
    			User instance = (User) getHibernateTemplate().get(
    					"com.sunline.entity.User", id);
    			return instance;
    		} catch (RuntimeException re) {
    			log.error("get failed", re);
    			throw re;
    		}
    	}
    
    	public List findByExample(User instance) {
    		log.debug("finding User instance by example");
    		try {
    			List results = getHibernateTemplate().findByExample(instance);
    			log.debug("find by example successful, result size: "
    					+ results.size());
    			return results;
    		} catch (RuntimeException re) {
    			log.error("find by example failed", re);
    			throw re;
    		}
    	}
    
    	public List findByProperty(String propertyName, Object value) {
    		log.debug("finding User instance with property: " + propertyName
    				+ ", value: " + value);
    		try {
    			String queryString = "from User as model where model."
    					+ propertyName + "= ?";
    			return getHibernateTemplate().find(queryString, value);
    		} catch (RuntimeException re) {
    			log.error("find by property name failed", re);
    			throw re;
    		}
    	}
    
    	public List findByUserName(Object userName) {
    		return findByProperty(USER_NAME, userName);
    	}
    
    	public List findByUserPassword(Object userPassword) {
    		return findByProperty(USER_PASSWORD, userPassword);
    	}
    
    	public List findByUserStatus(Object userStatus) {
    		return findByProperty(USER_STATUS, userStatus);
    	}
    
    	public List findAll() {
    		log.debug("finding all User instances");
    		try {
    			String queryString = "from User";
    			return getHibernateTemplate().find(queryString);
    		} catch (RuntimeException re) {
    			log.error("find all failed", re);
    			throw re;
    		}
    	}
    
    	public User merge(User detachedInstance) {
    		log.debug("merging User instance");
    		try {
    			User result = (User) getHibernateTemplate().merge(detachedInstance);
    			log.debug("merge successful");
    			return result;
    		} catch (RuntimeException re) {
    			log.error("merge failed", re);
    			throw re;
    		}
    	}
    
    	public void attachDirty(User instance) {
    		log.debug("attaching dirty User instance");
    		try {
    			getHibernateTemplate().saveOrUpdate(instance);
    			log.debug("attach successful");
    		} catch (RuntimeException re) {
    			log.error("attach failed", re);
    			throw re;
    		}
    	}
    
    	public void attachClean(User instance) {
    		log.debug("attaching clean User instance");
    		try {
    			getHibernateTemplate().lock(instance, LockMode.NONE);
    			log.debug("attach successful");
    		} catch (RuntimeException re) {
    			log.error("attach failed", re);
    			throw re;
    		}
    	}
    
    	public static UserDAO getFromApplicationContext(ApplicationContext ctx) {
    		return (UserDAO) ctx.getBean("UserDAO");
    	}
    }

总结:

框架就是敏捷开发,迅速上手项目的一种工具,有了这些框架,可以大大缩短开发的周期.

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