SSM框架实例 - 极悦
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SSM框架实例

  • 2022-01-10 10:22:46
  • 1392次 极悦

1.SSM框架

SSM(Spring+SpringMVC+MyBatis)框架集由Spring、SpringMVC、MyBatis三个开源框架整合而成，常作为数据源较简单的web项目的框架。

2.简单实例

(1)项目结构

(2)PageBean.java

package cn.hwd.paging.bean;
import java.util.List;
public class PageBean<T> {	
	private int pc;// 当前页码page code
//	private int tp;// 总页数total page
	private int tr;// 总记录数total record
	private int ps;// 每页记录数page size
	private List<T> list;// 当前页的记录
	public int getPc() {
		return pc;
	}
	public void setPc(int pc) {
		this.pc = pc;
	}
	/**
	 * 计算总页数
	 * @return
	 */
	public int getTp() {
		// 通过总记录数和每页记录数来计算总页数
		int tp = tr / ps;
		return tr%ps==0 ? tp : tp+1;
	}
//	public void setTp(int tp) {
//		this.tp = tp;
//	}
	public int getTr() {
		return tr;
	}
	public void setTr(int tr) {
		this.tr = tr;
	}
	public int getPs() {
		return ps;
	}
	public void setPs(int ps) {
		this.ps = ps;
	}
	public List<T> getList() {
		return list;
	}
	public void setList(List<T> list) {
		this.list = list;
	}
}

(3)User.java

package cn.hwd.paging.bean;
import java.util.Date; 
public class User {	
	private Integer id;  
    private String name;  
    private Integer age;
    private Date birth;
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}
	public Date getBirth() {
		return birth;
	}
	public void setBirth(Date birth) {
		this.birth = birth;
	}
	public User() {
		super();
		// TODO Auto-generated constructor stub
	}
	public User(Integer id, String name, Integer age, Date birth) {
		super();
		this.id = id;
		this.name = name;
		this.age = age;
		this.birth = birth;
	}
}

(4)UserController.java

package cn.hwd.paging.controller; 
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import cn.hwd.paging.bean.PageBean;
import cn.hwd.paging.bean.User;
import cn.hwd.paging.service.UserService;
@Controller
@RequestMapping("/user")
public class UserController {	
	@Autowired
	private UserService userService;	
	@RequestMapping("/index.action")  
    public String index(
    		@RequestParam(value="pc", required=true, defaultValue="1") Integer pc, 
    		Model model) throws Exception {
		PageBean<User> pb = new PageBean<User>();
		pb.setPc(pc);
		int ps = 10;
		pb.setPs(ps);
		int tr = userService.count();
		pb.setTr(tr);
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("m", (pc - 1) * ps);
		map.put("n", ps);
		List<User> users = userService.findAll(map);
		pb.setList(users);
		model.addAttribute("pb", pb);
        return "index";
    }	
}

(5)UserMapper.java

package cn.hwd.paging.mapper; 
import java.util.List;
import java.util.Map; 
import cn.hwd.paging.bean.User; 
public interface UserMapper {	
	public Integer count() throws Exception;	
	public List<User> findAll(Map<String, Object> map) throws Exception; 	
}

(6)UserMapper.xml

<?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="cn.hwd.paging.mapper.UserMapper"> 
	<resultMap id="userResultMap" type="user">
	    <id column="id" property="id"/>
	    <result column="name" property="name"/>
	    <result column="age" property="age"/>
	    <result column="birth" property="birth"/>  
    </resultMap> 
	<select id="count" resultType="int">  
    	select count(*) from user
  	</select>  	
	<select id="findAll" parameterType="map" resultMap="userResultMap">  
    	select id,name,age,birth from user limit #{m}, #{n}
  	</select>  	
</mapper>

(7)UserService.java

package cn.hwd.paging.service; 
import java.util.List;
import java.util.Map;
import cn.hwd.paging.bean.User; 
public interface UserService { 
	public Integer count() throws Exception;	
	public List<User> findAll(Map<String, Object> map) throws Exception;	
}

(8)UserServiceImpl.java

package cn.hwd.paging.service.impl;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import cn.hwd.paging.bean.User;
import cn.hwd.paging.mapper.UserMapper;
import cn.hwd.paging.service.UserService 
@Service("userService")
public class UserServiceImpl implements UserService {	
	@Autowired
    private UserMapper userMapper;	
	public Integer count() throws Exception {
		return userMapper.count();
	}	
	@Override
	public List<User> findAll(Map<String, Object> map) throws Exception {
        return userMapper.findAll(map);
	} 
}

(9)jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/hwd
jdbc.username=root
jdbc.password=mysql

(10)log4j.properties

# 定义log输出级别
log4j.rootLogger=DEBUG, Console
# 定义log输出为控制台
log4j.appender.Console=org.apache.log4j.ConsoleAppender
# 指定输出格式，其中%p表示日志级别 ，%t表示当前线程名，%m表示日志内容，%n表示换行
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%5p [%t] - %m%n

(11)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>
	<typeAliases>
		<package name="cn.hwd.paging.bean" />
	</typeAliases>	
</configuration>

(12)spring-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"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.3.xsd">    
    <context:component-scan base-package="cn.hwd.paging" />    
	<!-- 配置视图解析器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!-- 配置jsp路径的前缀 -->
		<property name="prefix" value="/WEB-INF/page/" />
		<!-- 配置jsp路径的后缀 -->
		<property name="suffix" value=".jsp" />
	</bean>	
	<context:property-placeholder location="classpath:jdbc.properties" /> 
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" 
    	destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
    </bean>    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- mybatis配置文件 -->
        <property name="configLocation" value="classpath:mybatis-config.xml" />
        <!-- 数据源 -->
        <property name="dataSource" ref="dataSource" />
    </bean>    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    	<property name="basePackage" value="cn.hwd.paging.mapper" />
    	<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>	
</beans>

(13)pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>cn.hwd</groupId>
  <artifactId>paging</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>paging Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.8.1</version>
    </dependency>
    <dependency>
	  <groupId>javax.servlet</groupId>
	  <artifactId>servlet-api</artifactId>
	  <version>2.5</version>
	</dependency>
	<dependency>
  	  <groupId>org.mybatis</groupId>
  	  <artifactId>mybatis</artifactId>
  	  <version>3.2.6</version>
  	</dependency>
  	<dependency>
	  <groupId>mysql</groupId>
	  <artifactId>mysql-connector-java</artifactId>
	  <version>5.1.30</version>
	</dependency>
  	<dependency>
  	  <groupId>log4j</groupId>
  	  <artifactId>log4j</artifactId>
  	  <version>1.2.16</version>
  	</dependency>
  	<dependency>
	  <groupId>org.springframework</groupId>
	  <artifactId>spring-webmvc</artifactId>
	  <version>4.0.2.RELEASE</version>
	</dependency>
	<dependency>
  	  <groupId>org.mybatis</groupId>
  	  <artifactId>mybatis-spring</artifactId>
  	  <version>1.2.2</version>
  	</dependency>
  	<dependency>
  	  <groupId>commons-dbcp</groupId>
  	  <artifactId>commons-dbcp</artifactId>
  	  <version>1.2.2</version>
  	</dependency>
  	<dependency>
  	  <groupId>org.springframework</groupId>
  	  <artifactId>spring-jdbc</artifactId>
  	  <version>4.0.2.RELEASE</version>
  	</dependency>
  	<dependency>  
      <groupId>javax.servlet</groupId>  
      <artifactId>jstl</artifactId>  
      <version>1.2</version>  
    </dependency>  
    <dependency>  
      <groupId>taglibs</groupId>  
      <artifactId>standard</artifactId>  
      <version>1.1.2</version>  
    </dependency>
  </dependencies>
  <build>
    <finalName>paging</finalName>
  </build>

(14)index.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>paging</title>
</head>
<body>
	<table>
		<thead>
			<tr>
				<th>id</th>
				<th>name</th>
				<th>age</th>
				<th>birth</th>
			</tr>
		</thead>
		<tfoot>
			<tr>
				<td colspan="4">
					第${pb.pc }页/共${pb.tp }页
					<a href="<c:url value="/user/index.action" />?pc=1">首页</a>
					<c:if test="${pb.pc > 1 }">
						<a href="<c:url value="/user/index.action" />?pc=${pb.pc - 1 }">上一页</a>
					</c:if>
					<%-- 计算begin、end --%>
					<c:choose>
						<%-- 如果总页数不足10页，那么把所有的页数都显示出来！ --%>
						<c:when test="${pb.tp <= 10 }">
							<c:set var="begin" value="1" />
							<c:set var="end" value="${pb.tp }" />
						</c:when>
						<c:otherwise>
							<%-- 当总页数>10时，通过公式计算出begin和end --%>
							<c:set var="begin" value="${pb.pc-5 }" />
							<c:set var="end" value="${pb.pc+4 }" />	
							<%-- 头溢出 --%>
							<c:if test="${begin < 1 }">
								<c:set var="begin" value="1" />
								<c:set var="end" value="10" />
							</c:if>	
							<%-- 尾溢出 --%>
							<c:if test="${end > pb.tp }">
								<c:set var="begin" value="${pb.tp - 9 }" />
								<c:set var="end" value="${pb.tp }" />
							</c:if>	
						</c:otherwise>
					</c:choose>
					<%-- 循环遍历页码列表 --%>
					<c:forEach var="i" begin="${begin }" end="${end }">
						<c:choose>
							<c:when test="${i eq pb.pc }">
								[${i }]
							</c:when>
							<c:otherwise>
								<a href="<c:url value="/user/index.action" />?pc=${i}">[${i }]</a>	
							</c:otherwise>
						</c:choose>
					</c:forEach>
					<c:if test="${pb.pc < pb.tp }">
						<a href="<c:url value="/user/index.action" />?pc=${pb.pc + 1 }">下一页</a>
					</c:if>
					<a href="<c:url value="/user/index.action" />?pc=${pb.tp }">尾页</a>
				</td>
			</tr>
		</tfoot>
		<tbody>
			<c:forEach items="${pb.list }" var="user">
				<tr>
					<td>${user.id }</td>
					<td>${user.name }</td>
					<td>${user.age }</td>
					<td><fmt:formatDate value="${user.birth }" pattern="yyyy/MM/dd HH:mm:ss" /></td>
				</tr>
			</c:forEach>
		</tbody>
	</table>
</body>
</html>

(15)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" 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">  
  <display-name>Archetype Created Web Application</display-name>
  <welcome-file-list>  
    <welcome-file>index.html</welcome-file>  
    <welcome-file>index.htm</welcome-file>  
    <welcome-file>index.jsp</welcome-file>  
    <welcome-file>default.html</welcome-file>  
    <welcome-file>default.htm</welcome-file>  
    <welcome-file>default.jsp</welcome-file>  
  </welcome-file-list>  
  <!-- 配置前端控制器 -->  
  <servlet>  
    <servlet-name>spring</servlet-name>  
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-servlet.xml</param-value>
    </init-param> 
  </servlet>  
  <servlet-mapping>  
    <servlet-name>spring</servlet-name>  
    <url-pattern>*.action</url-pattern>  
  </servlet-mapping>
</web-app>

(16)运行结果

以上就是关于“SSM框架实例”的介绍，大家如果对此比较感兴趣，可以关注一下极悦的SSM视频教程，里面的课程内容全面细致，由浅到深，通俗易懂，适合没有基础的小白学习，希望对大家能够有所帮助。

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