EasyUIStruts2Hibernatespring 框架整合

Posted 丶疏影横斜

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经历了四个月的学习,中间过程曲折离奇,好在坚持下来了,也到了最后框架的整合中间过程也只有自己能体会了。

 

接下来开始说一下整合中的问题和技巧:

 

1,  jar包导入

    c3p0(2个)、jdbc(1个)、spring(15个)、Hibernate(10个)、Struts2(13个)、json(3个)

    及EasyUI的jquery包

 

2, 在src目录下新建一个实体类的包,并新建一个实体类

package com.han.entity;

import java.util.Date;

public class Student {

    private String sno ;
    private String sname ;
    private String ssex ;
    private Date sbirthday ;
    private String sclass ;
    
    /*省略set、get方法*/
}

3, 生成hibernate.cfg.xml的文件,并生成实体类的 Student.hbm.xml

 

  值得提的是cfg.xml中并不需要连接数据库的驱动、用户名、用户密码及文件的映射,因为在spring中我们会添加这些配置 

4, 这里我们用的是连接池连接数据库

  db.properties的配置(放在src下面):

 5, 接下来我们在app.xml配置中声明事务及事务的切点

6, 我们建如下包,并分别在对应包中建新的接口和实现类

7, 接下来我们开始Struts2的配置

  这里要注意的是Action的name这里要与网页中发送地址对应,class对应的则是aap.xml中的id名,这里整合spring的话class不能写类的限定名,不然会有空指针异常,method就是Action这个类中的方法名

8, 这里整合spring所以我们都定义了接口及其实现类

9, 在service层中我们定义了一个dao接口的实例化作为属性,并设置了set方法

10, 到这里基本的环境搭建就完成了

 

 

下面是每个层的具体方法:

dao层接口

package com.hanqi.dao;

import java.util.List;
import java.util.Map;

import com.han.entity.Student;

public interface StudentDAO {

    //获取分页数据集合
    List<Student> find(int page, int rows, String sort, Map<String, String> map) ;
    
    //获取数据条数
    int findTotal(Map<String, String> map) ;
    
    //添加数据
    void add(Student stu) ;
}

 

dao层接口的实现类impl

package com.hanqi.dao.impl;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.hibernate.Query;
import org.hibernate.SessionFactory;

import com.han.entity.Student;
import com.hanqi.dao.StudentDAO;

public class StudentDAOImpl implements StudentDAO {

    private SessionFactory sessionFactory ;
    
    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    @Override
    public List<Student> find(int page, int rows, String sort, Map<String, String> map) {

        List<Student> list = new ArrayList<>() ;//定义list变量并实例化
        
        String sql = "from Student where 1=1 " ; //创建基础HQL语句
        
        String snames = map.get("snames") ;//接收参数
        
        if(snames != null && !snames.equals(""))//判断参数
        {
            sql += "and sname =:snames " ;//
        }
        
        String sclasss = map.get("sclasss") ;
        
        if(sclasss != null && !sclasss.equals(""))
        {
            sql += "and sclass =:sclasss " ;
        }
        
        if(sort != null && !sort.equals(""))
        {
            sql += "order by " + sort ;
        }
        
        Query qu = sessionFactory.getCurrentSession().createQuery(sql) ;
        
        if(snames != null && !snames.equals(""))
        {
            qu.setString("snames", snames) ;
        }
        
        if(sclasss != null && !sclasss.equals(""))
        {
             qu.setString("sclasss", sclasss) ;
        }
        
        
        //System.out.println(sql);
        list = qu.setMaxResults(rows)//每页行数
                     .setFirstResult((page-1)*rows)//起始页码
                     .list() ;
        
        return list ;

    }

    @Override
    public int findTotal(Map<String, String> map) {
        int rtn = 0 ;//定义变量并赋值
        
        String sql = "select count(1) from Student where 1=1 " ;
        
        String snames = map.get("snames") ;//接收参数
        
        if(snames != null && !snames.equals(""))//判断参数
        {
            sql += "and sname =:snames " ;//
        }
        
        String sclasss = map.get("sclasss") ;
        
        if(sclasss != null && !sclasss.equals(""))
        {
            sql += "and sclass =:sclasss " ;
        }
        
        Query qu = sessionFactory.getCurrentSession().createQuery(sql) ;    //获取Query对象
        
        if(snames != null && !snames.equals(""))
        {
            qu.setString("snames", snames) ;
        }
        
        if(sclasss != null && !sclasss.equals(""))
        {
             qu.setString("sclasss", sclasss) ;
        }
        
        List<Object> list = qu.list() ;//定义list变量并实例化
        
        if(list != null && list.size() > 0 )//判断获取的集合非空及长度
        {
            rtn = Integer.parseInt(list.get(0).toString()) ;//给变量rtn赋值
        }
        
        return rtn ;//返回变量值
    }

    @Override
    public void add(Student stu) {

        sessionFactory.getCurrentSession().save(stu) ;
        
    }

}

 

service层接口

package com.hanqi.service;

import java.util.List;
import java.util.Map;

import com.han.entity.Student;

public interface StudentService {

    //获取分页数据集合
    public List<Student> getList(int page, int rows, String sort, Map<String, String> map) ;
    
    //获取数据条数
    int getTotal(Map<String, String> map) ;
    
    //查询分页数据,并返回JSON
    String getPageJSON(int page, int rows, String sort, Map<String, String> map) ;
    
    //添加数据
    void insert(Student stu) ;
}

 

service层接口的实现类impl

package com.hanqi.service.impl;

import java.util.List;
import java.util.Map;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.hanqi.service.PageJSON;
import com.han.entity.Student;
import com.hanqi.dao.StudentDAO;
import com.hanqi.service.StudentService;

public class StudentServiceImpl implements StudentService {

    private StudentDAO studentDAO ;
    
    public void setStudentDAO(StudentDAO studentDAO) {
        this.studentDAO = studentDAO;
    }

    @Override
    public List<Student> getList(int page, int rows, String sort, Map<String, String> map) {

        return studentDAO.find(page, rows, sort, map) ;

    }

    @Override
    public int getTotal(Map<String, String> map) {
        
        return studentDAO.findTotal(map) ;
    }

    @Override
    public String getPageJSON(int page, int rows, String sort, Map<String, String> map) {

        PageJSON<Student> pj = new PageJSON<Student>() ; 
        
        String rtn = "{\\"total\\":0,\\"rows\\":[ ]}" ;//转义字符
        
        int total = studentDAO.findTotal(map) ;
        
        if(total > 0)
        {
            List<Student> list = studentDAO.find(page, rows, sort, map) ;
            
            //将List集合转为JSON集合
            String json_list = JSONArray.toJSONString(list) ;
            
            pj.setRows(list);
            pj.setTotal(total);
            
            rtn = JSONObject.toJSONString(pj) ;
            
            //转义字符返回复合类型的JSON字符串
            //rtn =  "{\\"total\\":"+total+",\\"rows\\":"+json_list+"}" ;
        }
        
        return rtn ;
        
    }

    @Override
    public void insert(Student stu) {

        studentDAO.add(stu); 
        
    }

}

 

action类(这里用的域模型来接受从页面传递过来的参数,即直接定义名字相同的属性值,并生成set、get方法)

package com.hanqi.action;

import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.ServletActionContext;

import com.han.entity.Student;
import com.hanqi.service.StudentService;

public class StudentAction {

    private StudentService studentService ;
    
    public void setStudentService(StudentService studentService) {
        this.studentService = studentService;
    }

    public StudentService getStudentService() {
        return studentService;
    }

    private int page ;
    private int rows ;
    private String sort ;
    private String order ;
    
    private String snames ;
    private String sclasss ;
    
    @Override
    public String toString() {
        return "StudentAction [page=" + page + ", rows=" + rows + ", sort=" + sort + ", order=" + order + ", snames="
                + snames + ", sclasss=" + sclasss + "]";
    }

    public int getPage() {
        return page;
    }

    public void setPage(int page) {
        this.page = page;
    }

    public int getRows() {
        return rows;
    }

    public void setRows(int rows) {
        this.rows = rows;
    }

    public String getSort() {
        return sort;
    }

    public void setSort(String sort) {
        this.sort = sort;
    }

    public String getOrder() {
        return order;
    }

    public void setOrder(String order) {
        this.order = order;
    }

    public String getSnames() {
        return snames;
    }

    public void setSnames(String snames) {
        this.snames = snames;
    }

    public String getSclasss() {
        return sclasss;
    }

    public void setSclasss(String sclasss) {
        this.sclasss = sclasss;
    }

    public void getStudentList()
    {
        System.out.println(this);
        
        try{
            //查询参数
            if(snames != null)
            {
                snames =new String(snames.getBytes("ISO-8859-1"),"UTF-8") ;//转码
            }
    
            if(sclasss != null)
            {
                sclasss =new String(sclasss.getBytes("ISO-8859-1"),"UTF-8") ;//转码
            }
            System.out.println("snames = "+ snames );
            
            System.out.println("sclasss = " + sclasss );
            
            Map<String, String> map = new HashMap<String, String>() ;
                
            map.put("snames", snames) ;
            map.put("sclasss", sclasss) ;
                
//            map.put("snames","刘四") ;
//            map.put("sclasss", "11111") ;
            String ls = "" ;
            
            System.out.println(order +"=" +sort);
            
            if(sort != null && order != null)
            {
                ls = sort + " " + order ;
            }
            
            String json_list = studentService.getPageJSON(page, rows, ls, map) ;
            //返回数据
            //System.out.println("json = "+json_list);
            
            HttpServletResponse response = ServletActionContext.getResponse();
            
            response.setCharacterEncoding("UTF-8");
            
            response.getWriter().write(json_list) ;
            
        }catch(Exception e)
        {
            e.printStackTrace();
        }
        
    }
    
    //接收参数
    private String sno  ;
    private String sname ;
    private String ssex ;
    private String sclass ;
    private String sbirthday ;
     
    
    public String getSno() {
        return sno;
    }

    public void setSno(String sno) {
        this.sno = sno;
    }

    public String getSname() {
        return sname;
    }

    public void setSname(String sname) {
        this.sname = sname;
    }

    public String getSsex() {
        return ssex;
    }

    public void setSsex(String ssex) {
        this.ssex = ssex;
    }

    public String getSclass() {
        return sclass;
    }

    public void setSclass(String sclass) {
        this.sclass = sclass;
    }

    public String getSbirthday() {
        return sbirthday;
    }

    public void setSbirthday(String sbirthday) {
        this.sbirthday = sbirthday;
    }

    public void insert() throws IOException
    {
        if(sno != null  )
        {
            String msg ;
            
            try
            {
                Student stu = new Student();
                
                stu.setSclass(sclass);
                stu.setSname(sname);
                stu.setSno(sno);
                stu.setSsex(ssex); 
                
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
                
                
                stu.setSbirthday(sdf.parse(sbirthday)); 
                
                studentService.insert(stu); 
                    
                msg = "{\'success\':true,\'message\':\'保存成功\'}" ;
                
            }
            catch(Exception e)
            {
                msg = "{\'success\':false,\'message\':\'保存失败\'}";
                System.out.println("yichanghaha");
                
            }
            
            HttpServletResponse response = ServletActionContext.getResponse();
            
            response.setCharacterEncoding("UTF-8");
            
            response.getWriter().write(msg);
        }
        else
        {
            String msg = "{\'success\':false,\'message\':\'访问异常\'}" ;
            
            HttpServletResponse response = ServletActionContext.getResponse();
            
            response.setCharacterEncoding("UTF-8");
            
            response.getWriter().write(msg);
        }
    }
    
}

 

同时在上面的action数据往前台html传送时我们为了返回json格式的字符串更加的方便灵活,我们定义了一个获取json

字符串格式的泛型辅助类,代码如下:

package com.hanqi.service;

import java.util.ArrayList;
import java.util.List;

public class PageJSON<T> {

    private int total = 0 ;
    
    private List<T> rows = new ArrayList<T>() ;

    public int getTotal() {
        return total;
    }

    public void setTotal(int total) {
        this.total = total;
    }

    public List<T> getRows() {
        return rows;
    }

    public void setRows(List<T> rows) {
        this.rows = rows;
    }


}

 

Struts.xml

<?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>
    <!-- 允许调用静态方法和静态属性 -->
    <constant name="struts.ognl.allowStaticMethodAccess" value="true"></constant>
    <constant name="struts.action.extension" value="do,action,,"></constant>
    
    <package name="stu" extends="struts-default">
        
            <action name="studentAction" 
                    class="studentAction" method="getStudentList">
                    <!-- name 对应的是网页中的post/get请求 -->
                    <!-- 这里的class来源是spring配置中的id名 -->
                    <!-- method 方法是Action这个类中的方法 -->
            </action>
    
            <action name="addstudentAction" 
                    class="studentAction" method="insert">
                    <!-- name 对应的是网页中的post/get请求 -->
                    <!-- 这里的class来源是spring配置中的id名 -->
                    <!-- method 方法是Action这个类中的方法 -->
            </action>
            
    </package>
</struts>

 

app.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:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:jdbc="http://www.springframework.org/schema/jdbc"
    xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.2.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-4.2.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd">

<!-- 基于c3p0连接池的数据源 -->
<!-- 加载外部配置文件 -->
<context:property-placeholder location="classpath:db.properties"/>

<!-- 连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver_class}"></property>
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="user" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
        <property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>
        <property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property>
</bean>


<!-- Hibernate 的 SessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">


    <property name="dataSource" ref="dataSource"></property>
    
    <!-- 加载Hibernate的配置文件 -->        
    <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
    
    <!-- 映射文件, 可以使用*作为通配符-->
    <property name="mappingLocations" value="classpath:com/han/entity/*.hbm.xml" ></property>

</bean>


<!-- bean -->
<!-- DAO -->
<bean id="studentDAOImpl"  class="com.hanqi.dao.impl.StudentDAOImpl"
            p:sessionFactory-ref="sessionFactory"></bean>

<!-- Service -->
<bean id="studentServiceImpl" class="com.hanqi.service.impl.StudentServiceImpl" 
            p:studentDAO-ref="studentDAOImpl"></bean>

<!-- 配置Action -->
<!-- Action 的实例不能是单例的 -->
<bean id="studentAction" class="com.hanqi.action.StudentAction" scope="prototype" 
p:studentService-ref="studentServiceImpl"></bean>

<!-- 声明式事务 -->
<!-- 1.事务管理器 和sessionFactory关联 -->
<bean id="transactionManager" 
            class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"></property>
</bean>

<!-- 事务通知 -->
<tx:advice id="adv" transaction-manager="transactionManager">
        <tx:attributes>
                <tx:method name="*"/><!-- 使用事务的方法 -->
                <tx:method name="get" read-only="true"/> <!-- get开头的只读方法,不使用事务 -->
                <tx:method name="find" read-only="true"/> <!-- find开头的只读方法,不使用事务 -->
        </tx:attributes>
</tx:advice>

<!-- 事务切点 -->
<aop:config>
        

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