SSM框架整合
环境
- IDEA2018
- Tomcat8
- Maven3.5.2
- Mysql5.5.40
1.新建数据库
CREATE DATABASE `ssmbuild`;
USE ssmbuild;
DROP TABLE IF EXISTS `books`;
CREATE TABLE `books`(
`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书ID',
`bookName` VARCHAR(100) NOT NULL COMMENT '书名字',
`bookCounts` INT(11) NOT NULL COMMENT '书数量',
`detail` VARCHAR(20) NOT NULL COMMENT '描述',
KEY `bookID`(`bookID`)
)ENGINE= INNODB CHARSET=utf8;
INSERT INTO books(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES
(1,'Java',1,'从入门到放弃'),
(2,'Mysql',10,'从删库到跑路'),
(3,'Linux',5,'从进门到进牢');
2.搭建基本环境
- 新建一个Maven项目（解决依赖，和项目导出问题）
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.rm</groupId>
<artifactId>ssmbuild</artifactId>
<version>1.0-SNAPSHOT</version>
<!--依赖 junit，数据库驱动，连接池，servlet，jsp，
jstl,mybatis，mybatis-spring，spring,lombok-->
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.32</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.3</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
</dependency>
</dependencies>
<!--静态资源导出问题-->
<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>
</project>
- 连接数据库
- 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>
- 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
https://www.springframework.org/schema/beans/spring-beans.xsd">
</beans>
- database.properties
jdbc.driver=com.mysql.jdbc.Driver
#如果使用的是MysQL8.0+，增加一个时区的配置;&serverTimezone=Asia/Shanghai
jdbc.ur1=jdbc:mysql://localhost:3306/ssmbuild?
useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root
- 项目结构
3.SSM整合（Mybatis层）
mybatis-config.xml- mybatis配置文件只负责别名和设置
- 其他交给spring
<?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>
<!--开启默认日志-->
<settings>
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
<!--配置数据源，交给spring去做-->
<typeAliases>
<package name="com.rm.pojo"/>
</typeAliases>
</configuration>
3.1编写实体类和业务接口（Dao层）
Books- 属性和数据库字段保持一致
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
private int bookID;
private String bookName;
private int bookCounts;
private String detail;
}
BookMapper- 业务接口
public interface BookMapper {
//增删改查
//增加一本书
int addBook(Books books);
//删除一本书
int deleteBookById(@Param("BookID") int id);
//更新一本书
int updateBook(Books books);
//查询一本书
Books queryBookById(@Param("BookID")int id);
//查询全部的书
List<Books> queryAllBook();
}
BookMapper.xml- 该配置文件相当于过去的接口实现类，编写具体的业务代码
- 注意：在namespace绑定具体的Mapper接口
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.rm.mapper.BookMapper">
<!--增加一本书-->
<insert id="addBook" parameterType="Books">
insert into ssmbuild.books (bookName,bookCounts,detail)
values (#{bookName},#{bookCounts},#{detail});
</insert>
<!--删除一本书-->
<delete id="deleteBookById" parameterType="_int">
delete from ssmbuild.books
where bookID=#{bookID};
</delete>
<!--更新一本书-->
<update id="updateBook" parameterType="Books">
update ssmbuild.books
set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}
where bookID=#{bookID};
</update>
<!--查询一本书-->
<select id="queryBookById" parameterType="_int" resultType="Books">
select * from ssmbuild.books
where bookID=#{bookID};
</select>
<!--查询所有书-->
<select id="queryAllBook" resultType="Books">
select * from ssmbuild.books;
</select>
</mapper>
3.2编写具体的业务代码(Service层)
BookService- 调用Dao层
public interface BookService {
//增删改查
//增加一本书
int addBook(Books books);
//删除一本书
int deleteBookById(int id);
//更新一本书
int updateBook(Books books);
//查询一本书
Books queryBookById(int id);
//查询全部的书
List<Books> queryAllBook();
}
BookServiceImpl- 业务层实现类
- 具体的业务实现代码
public class BookServiceImpl implements BookService {
//service调dao层就对了，需要将dao组合进来,有set方法，spring直接托管
private BookMapper bookMapper;
public void setBookMapper(BookMapper bookMapper) {
this.bookMapper = bookMapper;
}
public int addBook(Books books) {
return bookMapper.addBook(books);
}
public int deleteBookById(int id) {
return bookMapper.deleteBookById(id);
}
public int updateBook(Books books) {
return bookMapper.updateBook(books);
}
public Books queryBookById(int id) {
return bookMapper.queryBookById(id);
}
public List<Books> queryAllBook() {
return bookMapper.queryAllBook();
}
}
4.SSM整合（Spring层）
spring-dao.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
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--1.关联数据库配置文件-->
<context:property-placeholder location="classpath:database.properties"/>
<!--2.连接池
dbcp:半自动化操作，不能自动连接
c3p0:自动化操作（自动化的加载配置文件，并且可以自动设置到对象中）
druid:
hikari
-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.ur1}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!-- c3p0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="10880" />
<!--当获取连接失败重试次数-->
<property name="acquireRetryAttempts" value="2"/>
</bean>
<!--3.sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--绑定数据源-->
<property name="dataSource" ref="dataSource"/>
<!--绑定mybatis的配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<!--注册映射器，mybatis-config可以省略-->
<property name="mapperLocations" value="classpath:com/rm/mapper/*.xml"/>
</bean>
<!--原来使用接口实现类。是因为接口无法注入到Spring，而这个配置文件就是注入接口a!-->
<!--配置dao接口扫描包,动态的实现了Dao接口可以注入到Spring容器中-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--注入sqlSessionFactory-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!--要扫描的dao包-->
<property name="basePackage" value="com.rm.mapper"/>
</bean>
</beans>
spring-service.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
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--1.扫描service下的包-->
<context:component-scan base-package="com.rm.service"/>
<!--2.将所有业务类，注入到spring中，可以通过配置或者注解实现-->
<bean id="BookServiceImpl" class="com.rm.service.BookServiceImpl">
<property name="bookMapper" ref="bookMapper"/>
</bean>
<!--3.声明式事务配置-->
<bean id="DataSourceTransactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--注入数据源-->
<property name="dataSource" ref="dataSource"/>
</bean>
<!--4.aop横切事务-->
</beans>
5.SSM整合（SpringMVC层）
web.xml- 注册dispatchServlet及乱码过滤
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<!--dispatchServlet-->
<servlet>
<servlet-name>dispatchServlet</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>dispatchServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--乱码过滤-->
<filter>
<filter-name>encoding</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>encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--session超时时间-->
<session-config>
<session-timeout>15</session-timeout>
</session-config>
</web-app>
spring-webmvc.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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--1.注解驱动-->
<mvc:annotation-driven/>
<!--2.静态资源过滤-->
<mvc:default-servlet-handler/>
<!--3.扫描包controller-->
<context:component-scan base-package="com.rm.controller"/>
<!--4。视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
id="internalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
将这三个配置文件合为一个
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
https://www.springframework.org/schema/beans/spring-beans.xsd">
<!--整合其他配置文件-->
<import resource="classpath:spring-dao.xml"/>
<import resource="classpath:spring-service.xml"/>
<import resource="classpath:spring-mvc.xml"/>
</beans>
5.1三层架构（Controller层）
BookController
@Controller
@RequestMapping("/book")
public class BookController {
//controller层调service层
@Autowired//可以忽略set方法，根据Type自动装配
@Qualifier("BookServiceImpl")//根据bean的id自动装配
private BookService bookService;
//查询所有的书籍，并且返回到一个书籍展示页面
@RequestMapping("/all")
public String all(Model model){
List<Books> books = bookService.queryAllBook();
model.addAttribute("all",books);
return "allBook";
}
}
前端页面allBook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
${all}
</body>
</html>
6.测试代码
问题:bean不存在
步骤:
1．查看这个bean注入是否成功!ok
2. Junit单元测试，看我们的代码是否能够查询出来结果!ok
3．问题，一定不在我们的底层，是spring出了问题!
4. springMVc，整合的时候没调用到我们的service层的bean;
5. applicationcontext.xml没有注入bean
6. web.xml中，我们也绑定过配置文件!，发现问题，我们配置的是spring-mvc.xml
这里面确实没有service bean，所以报空指针
7. 将spring-mvc.xml改为applicationcontext.xml
7.业务实现
7.1 SSM整合：查询书籍功能
BookController
//查询所有的书籍，并且返回到一个书籍展示页面
@RequestMapping("/all")
public String all(Model model){
List<Books> books = bookService.queryAllBook();
model.addAttribute("all",books);
return "allBook";
}
allBook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>书籍展示</title>
</head>
<%--BootStrap美化页面--%>
<link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/
css/bootstrap.min.css" rel="stylesheet">
<body>
<div class="container">
<%--清除浮动--%>
<div class="row clearfix">
<%--栅格系统，把一个屏幕分成12份--%>
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>书籍列表 ---- 显示所有书籍</small>
</h1>
</div>
</div>
</div>
<%--展示数据--%>
<div class="row clearfix">
<div class="col-md-12 column">
<table class="table table-hover table-striped">
<thead>
<tr>
<th>书籍编号</th>
<th>书籍名称</th>
<th>书籍数量</th>
<th>书籍描述</th>
</tr>
</thead>
<%--数据被model封装在了list中，从list中遍历数据：foreach--%>
<tbody>
<c:forEach var="book" items="${list}">
<tr>
<td>${book.bookID}</td>
<td>${book.bookName}</td>
<td>${book.bookCounts}</td>
<td>${book.detail}</td>
</tr>
</c:forEach>
</tbody>
</table>
</div>
</div>
</div>
</body>
</html>
效果
7.2 SSM整合：添加书籍功能
- 在展示所有书籍页面添加一个新增书籍的按钮
<div class="row">
<div class="col-md-4 column">
<%--toAddBook--%>
<a class="btn btn-primary"
href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
</div>
</div>
- 在Controller中控制页面的跳转，点击a标签会跳转到addBook.jsp页面
BookController
//点击超链接跳转到增加书籍页面
@RequestMapping("toAddBook")
public String addBookPage(){
return "addBook";
}
addBook.jsp
- 将该表单提交到/book/addBook请求
- bookID自增列，不用手动添加。
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>添加书籍</title>
</head>
<%--BootStrap美化页面--%>
<link href="https://cdn.staticfile.org/twitter-bootstrap/
3.3.7/css/bootstrap.min.css" rel="stylesheet">
<body>
<div class="container">
<%--清除浮动--%>
<div class="row clearfix">
<%--栅格系统，把一个屏幕分成12份--%>
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>书籍列表 ---- 新增书籍</small>
</h1>
</div>
</div>
</div>
<%--name属性必须和实体类属性保持一致
required属性：必须在输入框输入值才能提交
--%>
<form action="${pageContext.request.contextPath}/book/addBook" method="get">
<div class="form-group">
<label>书籍名称</label>
<input type="text" name="bookName" class="form-control" required>
</div>
<div class="form-group">
<label>书籍数量</label>
<input type="text" name="bookCounts" class="form-control"required>
</div>
<div class="form-group">
<label >书籍描述</label>
<input type="text"name="detail" class="form-control" required>
</div>
<div class="form-group">
<input type="submit" class="form-control" value="添加">
</div>
</form>
</div>
</body>
</html>
BookController
//添加书籍的请求
@RequestMapping("addBook")
public String addBook(Books books){
System.out.println("addBook-->"+books);
bookService.addBook(books);
//添加完成后，重定向到首页
//重定向防止f5刷新重新提交表单
return "redirect:/book/all";
}
- 提交表单的时候bookID为0，数据库字段自增
7.3 SSM整合：修改删除书籍功能
- 前端展示页面实现，只需在展示页面加一列即可
<thead>
<tr>
<th>书籍编号</th>
<th>书籍名称</th>
<th>书籍数量</th>
<th>书籍描述</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<c:forEach var="book" items="${list}">
<tr>
<td>${book.bookID}</td>
<td>${book.bookName}</td>
<td>${book.bookCounts}</td>
<td>${book.detail}</td>
<td>
<a href="">修改</a> |
<a href="">删除</a>
</td>
</tr>
</c:forEach>
</tbody>
- 解决方法：修改接口接收的前端参数名称
7.3.1 SSM整合：修改书籍功能
- 在展示书籍页面添加修改书籍按钮，点击即跳转到修改书籍页面
- 跳转页面时需要携带需要修改的书的ID，然后查询该书。将其展示到对应的框中
- 使用隐藏域向后端发送书的ID来查询整本书的数据，用来展示
a标签
<a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.bookID}">
修改</a>
toUpdateBook
//点击修改按钮会携带数据跳转到修改页面
@RequestMapping("toUpdateBook")
public String toUpdatePage(int id,Model model){
//会携带这本书的id
Books books = bookService.queryBookById(id);
//将该book存放到model中
model.addAttribute("book",books);
//然后跳转到修改页面
return "updateBook";
}
updateBook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>修改书籍</title>
</head>
<%--BootStrap美化页面--%>
<link href="https://cdn.staticfile.org/twitter-bootstrap/
3.3.7/css/bootstrap.min.css" rel="stylesheet">
<body>
<div class="container">
<%--清除浮动--%>
<div class="row clearfix">
<%--栅格系统，把一个屏幕分成12份--%>
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>书籍列表 ---- 修改书籍</small>
</h1>
</div>
</div>
</div>
<%--name属性必须和实体类属性保持一致
required属性：必须在输入框输入值才能提交
--%>
<form action="${pageContext.request.contextPath}/book/updateBook" method="get">
<%--使用隐藏域，携带书ID，用来查询需要修改的书的id--%>
<input type="hidden" name="bookID" value="${book.bookID}">
<div class="form-group">
<label>书籍名称</label>
<input type="text" name="bookName" class="form-control"
value="${book.bookName}" required>
</div>
<div class="form-group">
<label>书籍数量</label>
<input type="text" name="bookCounts" class="form-control"
value="${book.bookCounts}" required>
</div>
<div class="form-group">
<label >书籍描述</label>
<input type="text"name="detail" class="form-control"
value="${book.detail}" required>
</div>
<div class="form-group">
<input type="submit" class="form-control" value="修改">
</div>
</form>
</div>
</body>
</html>
- 表单提交到updateBook请求
updateBook
//修改书籍页面
@RequestMapping("updateBook")
public String updateBook(Books books){
System.out.println("updateBook-->"+books);
bookService.updateBook(books);
//修改完重定向到首页，自动刷新
return "redirect:/book/all";
}
7.3.2 SSM整合：删除书籍功能
- 点击删除按钮，会将该书数据删除
a标签
<a href="${pageContext.request.contextPath}/book/deleteBook?id=${book.bookID}">
删除</a>
deleteBook
//删除书籍
@RequestMapping("/deleteBook")
public String deleteBook(int id){
bookService.deleteBookById(id);
//删除完重定向到首页，自动刷新
return "redirect:/book/all";
}
7.4 SSM整合：新增查询书籍功能
- 添加前端按钮
<div class="col-md-4 column"></div>
<div class="row">
<div class="col-md-4 column" style="float: right">
<%--查询功能form-inline表示该表单的所有框在一行--%>
<form action="" method="" class="form-inline">
<input name="queryBookName" class="form-control"
placeholder="请输入需要查询的书籍名称">
<input type="submit" class="btn btn-primary" value="查询">
</form>
</div>
</div>
- 在企业中新增一项业务，通常是由下往上开始的
- 即从dao层到service层再到controller层
dao层
BookMapper
//根据书籍名称查询书
Books queryBookByName(@Param("bookName") String bookName);
BookMapper.xml
<!--根据书籍名称查询书-->
<select id="queryBookByName" resultType="book">
select * from ssmbuild.books where bookName=#{bookName};
</select>
service层
BookService
//根据书籍名称查询书
Books queryBookByName(String bookName);
BookServiceImpl
public Books queryBookByName(String bookName) {
return bookMapper.queryBookByName(bookName);
}
controller层
BookController
//根据Name查询书籍
@RequestMapping("/queryBookByName")
public String queryBookByName(String bookName,Model model){
Books books = bookService.queryBookByName(bookName);
//只显示输入name的书
ArrayList<Books> list = new ArrayList<Books>();
list.add(books);
model.addAttribute("list",list);
return "allBook";
}
完善前端代码
- 表单提交地址
<%--查询功能form-inline表示该表单的所有框在一行--%>
<form action="${pageContext.request.contextPath}/book/queryBookByName
method="post" class="form-inline">
<input name="bookName"class="form-control"placeholder="请输入需要查询的书籍名称">
<input type="submit" class="btn btn-primary" value="查询">
</form>
代码改进
- 在查询页面添加一个返回查看所有书籍按钮，点击按钮跳转到all页面
前端代码
<div class="row">
<div class="col-md-4 column">
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/all">所有书籍</a>
</div>
</div>
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