SSM框架整合
作者：互联网
·前言
刚通过视频学完mybatis、spring、springMVC，做了一个SSM框架的整合。此框架是结合了视频中老师的思路，按照自己的理解进行整合的。这是原出处：http://dwz.date/ac27。框架设计了一个图书表，并可以通过前端web页面对图书表进行增删改查等操作。由于没有前端基础，页面比较简陋。同时，代码不够规范，大小写格式没有按照规范来。希望以后可以注意到并改正。
·整合步骤：
（1）通过maven创建一个不使用模板的项目，设置GAV（groupId、artifactId、version），并把项目设置成web项目
（2）创建数据库 :
CREATE TABLE `books` ( `bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id', `bookName` VARCHAR(100) NOT NULL COMMENT '书名', `bookCounts` INT(11) NOT NULL COMMENT '数量', `detail` VARCHAR(200) NOT NULL COMMENT '描述', KEY `bookID` (`bookID`) ) ENGINE=INNODB DEFAULT CHARSET=utf8
（3）导入依赖包，在pom.xml中配置：
<dependencies>
<!--Junit-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!--数据库驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<!-- 数据库连接池 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<!--Servlet - JSP -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--Mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.2</version>
</dependency>
<!--Spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.1.9.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.1.9.RELEASE</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.20</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.12.4</version>
</dependency>
</dependencies>
（4）设置静态资源过滤，在pom.xml中配置:
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
（5）创建项目基本结构（创建每一层的包）：
entity、dao、service、controller
（6）创建基础框架配置：
1.在resources文件夹中创建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>
</configuration>
2.在resources文件夹中创建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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
</beans>
（7）在resources文件夹中创建数据库配置文件 database.properties：
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/ssmbuilduseSSL=true&useUnicode=true&characterEncoding=utf8 jdbc.username=root jdbc.password=123
（8）IDEA关联数据库
（9）编写实体类：在entity下创建Books类：
package com.zyf.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
private int bookID;
private String bookName;
private int bookCounts;
private String detail;
}
（10）编写dao层的BooksMapper接口：
package com.zyf.dao;
import com.zyf.entity.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface BooksMapper {
int addBooks(Books books);
int deleteBooks(@Param("bookID") int id);
int updateBooks(Books books);
Books queryBooksById(@Param("bookID")int id);
List<Books> queryAllBooks();
}
（11）编写BooksMapper.xml实现接口BooksMapper：
<?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.zyf.dao.BooksMapper">
<insert id="addBooks" parameterType="Books">
insert into mybatis.books values (#{bookID},#{bookName},#{bookCounts},#{detail});
</insert>
<delete id="deleteBooks" parameterType="int">
delete from mybatis.books where bookID=#{bookID};
</delete>
<update id="updateBooks" parameterType="Books">
update mybatis.books set bookName = #{bookName},bookCounts=#{bookCounts},detail=#{detail} where bookID=#{bookID};
</update>
<select id="queryBooksById" resultType="Books">
select * from mybatis.books where bookID=#{bookID};
</select>
<select id="queryAllBooks" resultType="Books">
select * from mybatis.books;
</select>
</mapper>
在编写该代码的时候，需要在resources/mybatis-config.xml中，定义别名以及注册该mapper.xml：
<typeAliases>
<package name="com.zyf.entity"/>
</typeAliases>
<mappers>
<mapper resource="com/zyf/dao/BooksMapper.xml"/>
</mappers>
（12）编写service层BooksService接口：
package com.zyf.service;
import com.zyf.entity.Books;
import java.util.List;
public interface BooksService {
int addBooks(Books books);
int deleteBooks(int id);
int updateBooks(Books books);
Books queryBooksById(int id);
List<Books> queryAllBooks();
}
（13）编写service层BooksService的实现类BooksServiceImpl：
package com.zyf.service;
import com.zyf.dao.BooksMapper;
import com.zyf.entity.Books;
import java.util.List;
public class BooksServiceImpl implements BooksService{
//调用dao层的操作，设置一个set接口，方便Spring管理
private BooksMapper booksMapper;
public void setBooksMapper(BooksMapper booksMapper){
this.booksMapper=booksMapper;
}
public int addBooks(Books books) {
return booksMapper.addBooks(books);
}
public int deleteBooks(int id) {
return booksMapper.deleteBooks(id);
}
public int updateBooks(Books books) {
return booksMapper.updateBooks(books);
}
public Books queryBooksById(int id) {
return booksMapper.queryBooksById(id);
}
public List<Books> queryAllBooks() {
return booksMapper.queryAllBooks();
}
}
（14）编写resources/applicationContext.xml文件：
<?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
https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--1.关联数据库配置文件-->
<context:property-placeholder location="classpath:database.properties"/>
<!--2.注入数据库连接池-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!--连接池属性-->
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!-- c3p0连接池的私有属性 -->
<property name="maxPoolSize" value="30"/>
<property name="minPoolSize" value="10"/>
<!-- 关闭连接后不自动commit -->
<property name="autoCommitOnClose" value="false"/>
<!-- 获取连接超时时间 -->
<property name="checkoutTimeout" value="10000"/>
<!-- 当获取连接失败重试次数 -->
<property name="acquireRetryAttempts" value="2"/>
</bean>
<!--3.配置SqlSessionFactory对象,设置连接池和mybatis配置文件的位置-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<!--4.MapperScannerConfigurer 自动扫描 将Mapper接口生成代理注入到Spring-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.zyf.dao"/>
</bean>
<!--5.将BookServiceImpl注入到容器中-->
<!--当使用注解的方式注入时候，需要加入扫描代码<context:component-scan base-package="com.zyf.service" />-->
<bean id="BookServiceImpl" class="com.zyf.service.BooksServiceImpl">
<property name="booksMapper" ref="booksMapper"/>
</bean>
<!--6.配置事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--截止到6mybatis已经整合完毕，从7开始配置SpringMVC，即控制层以及请求等等的相关内容-->
<!--7.开启springMVC注解驱动,并设置JSON为utf-8-->
<mvc:annotation-driven>
<mvc:message-converters>
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=utf-8</value>
</list>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
<!--8..静态资源默认servlet配置-->
<mvc:default-servlet-handler/>
<!--9.由于使用了注解所以需要扫描-->
<context:component-scan base-package="com.zyf.controller"/>
<!--10.配置视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
（15）编写web.xml配置：
<!--设置前端控制器-->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--设置过滤器，此为一个编码类型的设置-->
<filter>
<filter-name>encodingFilter</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>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--设置一个session的过期时间-->
<session-config>
<session-timeout>15</session-timeout>
</session-config>
（16）编写控制层BooksController：
package com.zyf.controller;
import com.zyf.entity.Books;
import com.zyf.service.BooksService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import java.util.List;
@Controller
@RequestMapping("/Books")
public class BooksController {
@Autowired
@Qualifier("BookServiceImpl")
private BooksService booksService;
@RequestMapping("/All")
public String queryAllBooks(Model model) {
List<Books> list = booksService.queryAllBooks();
model.addAttribute("books", list);
return "AllBooks";
}
@RequestMapping("/toAddBooks")
public String toAddBooks() {
//使用此方法，可以跳转到WEB-INF下面的jsp页面
return "AddBooks";
}
@RequestMapping("/AddBooks")
public String AddBooks(Books books) {
System.out.println(books);
booksService.addBooks(books);
return "redirect:/Books/All";
}
@RequestMapping("/DeleteBooks/{bookID}")
public String DeleteBooks(@PathVariable("bookID") int bookID) {
booksService.deleteBooks(bookID);
return "redirect:/Books/All";
}
@RequestMapping("/toUpdate")
public String toUpdate(int id, Model model) {
Books books = booksService.queryBooksById(id);
model.addAttribute("books", books);
return "UpdateBooks";
}
@RequestMapping("/UpdateBooks")
public String UpdateBooks(Books books) {
booksService.updateBooks(books);
return "redirect:/Books/All";
}
}
（17）编写前端:1.主页面（index.jsp）：
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<a href="${pageContext.request.contextPath}/Books/All">查看所有书籍</a>
</body>
</html>
2.展示所有书籍页面（AllBooks.jsp）：
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>展示所有书籍</title>
</head>
<body>
<p><a href="${pageContext.request.contextPath}/Books/toAddBooks">添加书籍</a></p>
<table>
<thead>
<tr>
<th>书籍编号</th>
<th>书籍名字</th>
<th>书籍数量</th>
<th>书籍详情</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<c:forEach var="book" items="${books}">
<tr>
<th>${book.bookID}</th>
<th>${book.bookName}</th>
<th>${book.bookCounts}</th>
<th>${book.detail}</th>
<th><a href="${pageContext.request.contextPath}/Books/toUpdate?id=${book.bookID}">修改</a>|<a
href="${pageContext.request.contextPath}/Books/DeleteBooks/${book.bookID}">删除</a></th>
</tr>
</c:forEach>
</tbody>
</table>
</body>
</html>
3.添加书籍页面（AddBooks.jsp）:
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>添加书籍</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/Books/AddBooks" method="post">
书籍名字：<input type="text" name="bookName"/><br>
书籍数量：<input type="text" name="bookCounts"/><br>
书籍详情：<input type="text" name="detail"/><br>
<input type="submit" name="添加"/>
</form>
</body>
</html>
4.修改书籍页面（UpdateBooks.jsp）:
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/Books/UpdateBooks" method="post">
<input type="hidden" name="bookID" value="${books.bookID}">
书籍名字：<input name="bookName" type="text" value="${books.bookName}"><br>
书籍数量：<input name="bookCounts" type="text" value="${books.bookCounts}"><br>
书籍详情：<input name="detail" type="text" value="${books.detail}"><br>
<input type="submit" name="修改">
</form>
</body>
</html>
（18）打开project structure，把包导入
·初步创建项目后运行遇到的问题：
（1）applicationContext.xml的头没有写全
（2）最后添加了Jackson的包没有在project structure中添加
（3）空指针报错异常检查：web.xml配置的前段控制器绑定的配置文件是否包含了所有配置、控制层调用的service的接口是new出来的还是spring的，new出来的是错误的。
标签：bookID,框架,int,SSM,Books,books,整合,import,public 来源： https://www.cnblogs.com/phxy/p/15089507.html