快速搭建ssh代码篇

淩亂°似流年 2022-06-08 13:15 186阅读 0赞

接着上文，这里贴出测试及配置代码。首先是运行结果,tomcat配置之前有提及过，这里不再阐述。  
![这里写图片描述][SouthEast]  
为了解决hibernate的延迟加载问题，我们在web.xml里配置一个过滤器，也可以在hbm.xml的属性里配置lazy=false解决。  
list.jsp

<body>
    <table>
        <tr>
            <td>编号</td>
            <td>名称</td>
            <td>性别</td>
            <td>班级</td>
            <td>操作</td>
        </tr>
        <c:forEach var="student" items="${studentItems}">
        <tr>
            <td>${student.sid}</td>
            <td>${student.sname}</td>
            <td>${student.sex}</td>
            <td>${student.grade.gname}</td>
            <td>操作</td>
        </tr>
        </c:forEach>
    </table>
    </body>

web.xml

<context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </context-param>
    
        
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
        
        <filter>
            <filter-name>OpenSessionInViewFilter</filter-name>
            <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
        </filter>
        <filter-mapping>
            <filter-name>OpenSessionInViewFilter</filter-name>
            <url-pattern>*.action</url-pattern>
        </filter-mapping>
    
        
        <filter>
            <filter-name>struts2</filter-name>
            <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
        </filter>
        <filter-mapping>
            <filter-name>struts2</filter-name>
            <url-pattern>*.action</url-pattern>
        </filter-mapping>

applicationContext.xml;

<import resource="applicationContext-dao.xml" />
        <import resource="applicationContext-biz.xml" />
        <import resource="applicationContext-action.xml" />
        
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            
            <property name="driverClass" value="com.mysql.jdbc.Driver">
            </property>
            <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ssh">
            </property>
            <property name="user" value="root"></property>
            <property name="password" value="123456"></property>
            
            <property name="maxPoolSize" value="40"></property>
            
            <property name="minPoolSize" value="1"></property>
            
            <property name="initialPoolSize" value="1"></property>
            
            <property name="maxIdleTime" value="60"></property>
            
            <property name="checkoutTimeout" value="2000"></property>
        </bean>
        
        <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
            
            <property name="dataSource" ref="dataSource"></property>
            
            <property name="hibernateProperties">
                <props>
                    <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                    <prop key="hibernate.show_sql">true</prop>
                </props>
            </property>
            
            <property name="mappingResources">
                <list>
                    <value>com/ssh/entity/Grade.hbm.xml</value>
                    <value>com/ssh/entity/Student.hbm.xml</value>
                </list>
            </property>
        </bean>

applicationContext-dao.xml

<bean id="studentDao" class="com.ssh.dao.impl.StudentDaoImpl">
    
    <property name="sessionFactory"> 
    <ref bean="sessionFactory" /></property></bean>

applicationContext-biz.xml

<bean id="studentManagerBiz" class="com.ssh.biz.impl.StudentManagerBizImpl">
    <property name="studentDao" ref="studentDao"></property></bean>

applicationContext-action.xml

<bean id="studentManagerAction" class="com.ssh.action.StudentManagerAction" scope="prototype">
    <property name="studentManagerBiz" ref="studentManagerBiz"></property></bean>

struts.xml

实体类比较简单，这里不再给出，直接给出配置文件。  
student.hbm.xml

<hibernate-mapping>
        <class name="com.ssh.entity.Student" table="student">
            <id name="sid" type="long" column="sid">
                <generator class="native"></generator>
            </id>
            <property name="sname" type="java.lang.String" column="sname" />
            <property name="sex" type="java.lang.String" column="sex" />
            
            <many-to-one name="grade" class="com.ssh.entity.Grade" >
                <column name="gid"></column>
            </many-to-one>
    
        </class>
    </hibernate-mapping>

grade.hbm.xml

<hibernate-mapping>
        <class name="com.ssh.entity.Grade" table="grade">
            <id name="gid" type="long" column="gid">
                <generator class="native"></generator>
            </id>
            <property name="gname" type="java.lang.String" column="gname" />
            <property name="gdesc" type="java.lang.String" column="gdesc" />
    
        </class>
    
    </hibernate-mapping>

IStudentDao

public interface IStudentDao {
        /* * 查询所有的学生信息 * */
        public List<Student> findAllStudent();}

StudentDaoImpl

public class StudentDaoImpl extends HibernateDaoSupport implements IStudentDao { 
    
        @Override
        public List<Student> findAllStudent() {
            return super.getHibernateTemplate().find("FROM Student");
        }
    }

IStudentManagerBiz

public interface IStudentManagerBiz {
        //查询所有的学生信息
        public List<Student> findAllStudent();
    }

StudentManagerBizImpl

public class StudentManagerBizImpl implements IStudentManagerBiz{ 
        //学生数据访问对象
        private IStudentDao studentDao;
        public void setStudentDao(IStudentDao studentDao) {
            this.studentDao = studentDao;
        }
        @Override
        public List<Student> findAllStudent() {
            return studentDao.findAllStudent();
        }
    }

StudentManagerAction

public class StudentManagerAction extends ActionSupport { 
        //学生信息管理业务对象
        private IStudentManagerBiz studentManagerBiz;
    
        public void setStudentManagerBiz(IStudentManagerBiz studentManagerBiz) {
            this.studentManagerBiz = studentManagerBiz;
        }
    
        //查询所有的学生信息
        public String findAllStudent() {
            List<Student> studentItems = studentManagerBiz.findAllStudent();
            //获取request对象，存数据
            Map<String, Object> request = (Map<String, Object>) ActionContext.getContext().get("request");
            request.put("studentItems", studentItems);
            return ActionSupport.SUCCESS;
        }
    
    }

[SouthEast]: /images/20220608/a188e93e6e604056a97058e576f80f9a.png