實習小結（二）--- SSM框架搭建

時間 2020-06-04

標籤實習小結 ssm 框架搭建简体版

原文原文鏈接

SSM項目框架搭建

　　前幾天作了一個學生信息管理的項目，使用純控制檯輸入，查詢數據庫，將信息在控制檯中打印，功能完善得差很少以後，老師讓將這個項目移植到Web中，使用Spring+SpringMVC+MyBatis將項目作成網頁，藉此機會熟悉一下SSM框架的搭建流程。html

項目的目錄結構以下：java

SSM框架搭建流程：

一、項目所須要的jar包

　　圖片中的jar包可能一些多於的包，另外在開發中遇到沒有導入的包的時候再去下載mysql

二、配置文件

（1）web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  
  <!-- 該監聽器監聽應用的啓動，加載Spring的配置文件，默認加載WEB-INF下的名字爲applicationContext.xml文件 並建立Spring容器 -->
  <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  
  <!-- 告訴ContextLoaderListener下面配置的文件也是須要加載的 -->
  <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  
  <!-- 攔截器用於解決post請求中請求參數值可能出現亂碼的狀況 -->
  <filter>
      <filter-name>characterEncoding</filter-name>
      <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
         <init-param>
             <param-name>encoding</param-name>
             <param-value>utf-8</param-value>
         </init-param>
  </filter>
  <filter-mapping>
      <filter-name>characterEncoding</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>
  
  <!-- 配置SpringMVC中的分發控制器DispatcherServlet 默認加載WEB-INF下的springmvc-servlet.xml -->
  <servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>*.do</url-pattern>
  </servlet-mapping>
  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

（2）springmvc-servlet.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:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation=" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd ">
  
  <!-- 讓Spring識別註解 -->
  <context:component-scan base-package="com.sysystem.controller"></context:component-scan>
  <!-- 讓SpringMVC識別註解 -->
  <mvc:annotation-driven></mvc:annotation-driven>
  
  <!-- 配置視圖解析器 若是是顯式轉發，則能夠不須要視圖解析器-->
  <bean id="resourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
      <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
      <property name="prefix" value="/"/>
      <property name="suffix" value=".jsp"/>
  </bean> 
    
    <!-- 配置文件上傳解析器 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>
    
</beans>

（3）applicationContext.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" xsi:schemaLocation= "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 ">
  
    
    <!-- 讓Spring識別註解 -->
    <context:component-scan base-package="com.sysystem"></context:component-scan>
    
    <!-- 配置數據源,指出鏈接數據庫須要的驅動、url、用戶名和密碼以及鏈接池相關信息 -->
    <bean id="dbcpdataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql://localhost:3306/traineeinfo"></property>
        <property name="username" value="root"></property>
        <property name="password" value="root"></property>
        <property name="initialSize" value="20"></property>
        <property name="maxActive" value="10"></property>
        <property name="maxIdle" value="3"></property>
        <property name="minIdle" value="2"></property>
    </bean>

    <bean id="SqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <property name="dataSource" ref="dbcpdataSource"/>
    </bean>
    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" >
        <property name="basePackage" value="com.sysystem.model.dao"/>
        <property name="sqlSessionFactory" ref="SqlSessionFactory"></property>
    </bean>

</beans>

（4）mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    
    <!-- 在配置文件中定義別名，能夠在映射文件中使用別名 -->
    <typeAliases>
        <package name="com.sysystem.model.entity"/>
    </typeAliases>
    
  <!-- 註冊映射文件 -->
  <mappers>
    <package name="com.sysystem.model.dao"/>
  </mappers>
</configuration>

三、測試

student.java　　Student學生類，標準的JavaBean，屬性私有，提供setter/getter方法web

dao層

　　IStudentDao.java　　數據操做對象接口spring

package com.sysystem.model.dao; import java.util.List; import java.util.Map; import com.sysystem.model.entity.Student; public interface IStudentDao { // 獲取全部的學生信息
    List<Student> getAllStudentWithPage(Map<String,Object> map); // 根據學生id查詢學生信息
    Student getSingleStudent(int stu_id); // 得到學生表的記錄個數
    int getStuRows(); // 新增學生信息
    boolean addStu(Student stu); // 修改學生信息
    boolean updateStu(Student stu); }

　　IStudentDao.xml　　實現對數據庫的增刪改查操做sql

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.sysystem.model.dao.IStudentDao">
    <select id="getSingleStudent" parameterType="int" resultType="Student"> select stu_name,birthday,sex,school from stu_info where stu_id = #{stu_id} </select>

    <select id="getStuRows" resultType="int"> select count(1) from (SELECT s.stu_id FROM (stu_info s LEFT JOIN stu_pro_relation spr ON s.stu_id = spr.stu_id) LEFT JOIN project p ON p.pro_id = spr.pro_id) temp </select>

    <select id="getAllStudentWithPage" parameterType="java.util.Map" resultType="Student"> SELECT s.stu_id,s.stu_name,CEIL(DATEDIFF(CURDATE(), s.birthday) / 365.2422) age, s.sex,s.school,p.pro_id,p.pro_name,p.`code` FROM (stu_info s LEFT JOIN stu_pro_relation spr ON s.stu_id = spr.stu_id) LEFT JOIN project p ON p.pro_id = spr.pro_id LIMIT #{pageStart},#{pageSize} </select>
    
    <insert id="addStu" parameterType="Student"> insert into stu_info (stu_name,birthday,sex,school) values (#{stu_name},#{birthday},#{sex},#{school}) </insert>
    
    <update id="updateStu" parameterType="Student"> update stu_info set stu_name = #{stu_name},birthday = #{birthday},sex = #{sex},school = #{school} where stu_id = #{stu_id} </update>

</mapper>

service層

　　IStudentService.java　　　數據庫

package com.sysystem.model.service; import java.util.List; import java.util.Map; import com.sysystem.model.entity.Student; public interface IStudentService { // 獲取全部的學生信息
    List<Student> getAllStudentWithPage(Map<String,Object> map); // 根據學生id查詢學生信息
    Student getSingleStudent(int stu_id); // 得到學生表的記錄個數
    int getStuRows(); // 新增學生信息
    boolean addStu(Student stu); // 修改學生信息
    boolean updateStu(Student stu); }

　　StudentServiceImpl.java　　經過Dao獲取對象，而後進行業務邏輯實現apache

package com.sysystem.model.service.impl; import java.util.List; import java.util.Map; import javax.annotation.Resource; import org.springframework.stereotype.Service; import com.sysystem.model.dao.IStudentDao; import com.sysystem.model.entity.Student; import com.sysystem.model.service.IStudentService; @Service("stuService") public class StudentServiceImpl implements IStudentService { @Resource private IStudentDao stuDao; @Override public Student getSingleStudent(int stu_id) { return stuDao.getSingleStudent(stu_id); } @Override public int getStuRows() { return stuDao.getStuRows(); } @Override public List<Student> getAllStudentWithPage(Map<String,Object> map) { return stuDao.getAllStudentWithPage(map); } @Override public boolean addStu(Student stu) { return stuDao.addStu(stu); } @Override public boolean updateStu(Student stu) { return stuDao.updateStu(stu); } }

控制層Controller

　　BaseController.javajson

package com.sysystem.controller; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.http.HttpServletResponse; import com.google.gson.Gson; public class BaseController { /** * 向響應的輸出流寫文本數據 * @param response 響應 * @param str 文本數據 */
    public void writeToRes (HttpServletResponse response, String str){ // 設置輸出的字符集
        response.setContentType("text/html;charset=utf-8"); // 定義輸出流對象
        PrintWriter out = null; try { out = response.getWriter(); out.print(str); } catch (IOException e) { e.printStackTrace(); } finally { out.close(); } } /** * 向響應的輸出流寫json數據 * @param response 響應 * @param obj json數據 */
    public void writeToRes (HttpServletResponse response, Object obj){ response.setContentType("text/html;charset=utf-8"); PrintWriter out = null; try { out = response.getWriter(); String json = new Gson().toJson(obj); out.print(json); } catch (IOException e) { e.printStackTrace(); } finally { out.close(); } } }

　　StudentController.java瀏覽器

package com.sysystem.controller; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import com.sysystem.model.entity.Student; import com.sysystem.model.service.IStudentService; import com.sysystem.model.util.ChangeDate; import com.sysystem.model.util.Page; @Controller @RequestMapping("/student") public class StudentController extends BaseController{ @Resource private IStudentService studentService; /** * 根據學生的id獲取學生信息 * @param request 請求 * @param response 響應 * @param stu_id 學生id * @return 指定頁面前綴 * @throws Exception */ @RequestMapping("/getSingleStudent") public String getSingleStudent(HttpServletRequest request,HttpServletResponse response, int stu_id) throws Exception { Student student = studentService.getSingleStudent(stu_id); // 將CST類型的時間轉換爲字符串
        String date = ChangeDate.cst2String(student.getBirthday()); request.setAttribute("date", date); request.setAttribute("stu", student); return "updateStu"; } /** * 分頁得到學生的記錄信息 * @param request 請求 * @param response 響應 * @param curpage 當前頁 * @return 指定頁面的前綴 * @throws Exception */ @RequestMapping("/getAllStudentWithPage") public String getAllStudentWithPage(HttpServletRequest request,HttpServletResponse response,int curpage) throws Exception { // 定義每頁記錄個數
        int pageSize = 3; // 得到總記錄個數
        int total = studentService.getStuRows(); // 建立Page對象
        Page page = new Page(curpage, pageSize, total); // 得到總頁數
        int totalpage = page.gettotalpage(); // 獲得真實的當前頁
        curpage = page.getcurpage(); // 獲得Limit的第一個參數
        int pageStart = page.getStart(); // 將參數存放在map集合中（MyBatis中傳遞多個參數使用的方法）
        Map<String,Object> map = new HashMap<String,Object>(); map.put("pageStart", pageStart); map.put("pageSize", pageSize); // 得到查詢到的記錄集合
        List<Student> stulist = studentService.getAllStudentWithPage(map); // 將集合，當前頁，總頁數存放在request中
        request.setAttribute("stulist", stulist); request.setAttribute("curpage", curpage); request.setAttribute("totalpage", totalpage); return "allStu"; } @RequestMapping("/addStu") public String addStu(HttpServletRequest request,HttpServletResponse response,Student stu) throws Exception { boolean flag = studentService.addStu(stu); if (flag) { return "index"; }else{ return null; } } @RequestMapping("/updateStu") public void updateStu(HttpServletRequest request,HttpServletResponse response,Student stu) throws Exception { boolean flag = studentService.updateStu(stu); if (flag) { writeToRes(response, "1"); }else{ writeToRes(response, "0"); } } }

工具類

　　ChangeDate.java

package com.sysystem.model.util; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; public class ChangeDate { /** * 將java.util包下的Date對象轉爲java.sql包下的date * @param date java.util.Date * @return java.sql.Date */
    public static java.sql.Date utilDateToSqlDate(Date date) { // 獲取了毫秒值ֵ
        long millisTime = date.getTime(); // 根據毫秒值來獲取java.sql包下的Date對象
        java.sql.Date pubTime = new java.sql.Date(millisTime); return pubTime; } /** * 將字符串轉換成Date類型 * @param time String類型的時間字符串 * @return Date */
    public static Date strDate(String time) { Date date = null; DateFormat df = new SimpleDateFormat("yyyy-MM-dd"); try { date = df.parse(time); } catch (ParseException e) { System.out.println("日期格式輸入不正確 "); } return date; } /** * 將CST格式的日期轉換爲String字符串 * @param date 日期 * @return 字符串 */
    public static String cst2String(Date date){ String datestr = date.toString(); SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy", Locale.US); Date d =null; try { d = sdf.parse(datestr); } catch (ParseException e) { e.printStackTrace(); } String formatDate = new SimpleDateFormat("yyyy-MM-dd").format(d); return formatDate; } }

　　Page.java　　進行分頁的方法

package com.sysystem.model.util; public class Page { // 當前頁
    private int curpage; // 每頁記錄個數
    private int pageSize; // 總記錄數
    private int total; public Page(int curpage, int pageSize, int total) { this.curpage = curpage; this.pageSize = pageSize; this.total = total; } public Page() { } /** * 得到總頁數的方法 * * @return 總頁數 */
    public int gettotalpage() { int totalpage = 0; // 記錄總頁數分別對每頁記錄個數進行除法和取餘
        int m = total / pageSize; int n = total % pageSize; // 當結果存在餘數時則進行+1
        totalpage = (n == 0) ? m : m + 1; return totalpage; } /** * 得到當前頁的方法 * * @return 當前頁 */
    public int getcurpage() { // 得到總頁數
        int totalpage = gettotalpage(); // 噹噹前頁小於1時重置爲1
        if (curpage < 1) { curpage = 1; } // 噹噹前頁大於總頁數時重置爲總頁數
        if (curpage > totalpage) { curpage = totalpage; } return curpage; } /** * 得到LIMIT的第一個參數的方法 * * @return 返回第一個參數 */
    public int getStart() { // 得到總頁數
        int curpage = getcurpage(); int pageStart = (curpage - 1) * pageSize; return pageStart; } }

allStu.jsp

<body>
      <h1 align="center" >學生信息表</h1>
    <table width="100%" height="30%" border="1" >
        <tr>
            <td>學生姓名</td>
            <td>年齡</td>
            <td>性別</td>
            <td>學校</td>
            <td>項目名</td>
            <td>代碼量</td>
        </tr>
        <c:forEach var="stu" items="${stulist }">
            <tr>
                <td>${stu.stu_name }</td>
                <td>${stu.age }</td>
                <td>${stu.sex }</td>
                <td>${stu.school }</td>
                <td>${stu.pro_name }</td>
                <td>${stu.code }</td>
            </tr>
        </c:forEach>
    </table>
    <a href="<%=path %>/student/getAllStudentWithPage.do?curpage=1">首頁</a>
    <a href="<%=path %>/student/getAllStudentWithPage.do?curpage=${curpage-1 }">上一頁</a>
    <a href="<%=path %>/student/getAllStudentWithPage.do?curpage=${curpage+1 }">下一頁</a>
    <a href="<%=path %>/student/getAllStudentWithPage.do?curpage=${totalpage }">尾頁</a>
  </body>