这篇文章主要介绍“SSM框架如何使用”，在日常操作中，相信很多人在SSM框架如何使用问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”SSM框架如何使用”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
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。
(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/hwdjdbc.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>
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