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ssm框架整合，个人学习记录

SSM框架整合

依赖导入
- 测试 junit
- 数据库驱动连接池（c3p0 dbcp druid hikari）
- servlet三连servlet jsp jstl
- mybatis mybatis-spring
- spring
- lombok

<!--junit测试-->
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.13</version>
</dependency>
<!--数据库驱动-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.20</version>
</dependency>
<!--c3p0 数据库连接池-->
<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.5.5</version>
</dependency>
<!--servlet-->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
    </dependency>
<!--jsp-->
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.2</version>
</dependency>
<!--jstl-->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>
<!--mybatis-->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.5.4</version>
</dependency>
<!--mybatis-spring整合-->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>2.0.4</version>
</dependency>
<!--spring-->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.2.6.RELEASE</version>
</dependency>
<!--spring-jdbc-->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.2.6.RELEASE</version>
</dependency>
<!--lombok-->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.12</version>
</dependency>

静态资源导出问题

<build>
    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>true</filtering>
        </resource>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>true</filtering>
        </resource>
    </resources>
</build>

model层

pojo

Books

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Books {
    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;
}

dao

mybatis-config.xml

<?xml version="1.0" encoding="GBK" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!--设置 日志-->
    <settings>
        <setting name="lohImpl" value="STDOUT_LOGGING"/>
    </settings>

    <!--别名-->
    <typeAliases>
        <package name="com.min.pojo"/>
    </typeAliases>

    <!--配置数据源，整合后交给spring-->

    <mappers>
        <mapper class="com.min.dao.BookMapper"/>
    </mappers>
</configuration>

db.properties

jdbc.driver=com.mysql.jdbc.Driver
#如果使用MySQL8.0+,需要增加一个时区配置； &serverTimezone=Asia/Shanghai
jdbc.url=jdbc://mysql://localhost:3306/ssmbuild?useSSL=false&useUnicode=true&characterEncode=utf8&serverTimezone=Asia/Shanghai
jdbc.username=root
jdbc.password=123456

BookMapper接口

public interface BookMapper {
    //增加一本书
    public int addBook(Books book);

    //删除一本书
    public int deleteBookById(@Param("bookId") int id);

    //更新一本书
    public int updateBook(Books book);

    //查询一本书
    public Books queryBookById(@Param("bookId") int id);

    //查询所有的书
    public List<Books> queryAllBooks();
}

BookMapper.xml

<?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.min.dao.BookMapper">
    <insert id="addBook" parameterType="Books">
        insert into ssmbuild.books (bookName, bookCounts,detail)
        values (#{bookName},#{bookCounts},#{detail})
    </insert>

    <delete id="deleteBookById" parameterType="_int">
        delete from ssmbuild.books
        where bookID = #{bookId}
    </delete>

    <update id="updateBook" parameterType="Books">
        update ssmbuild.books
        set bookName = #{bookName},
        set bookCounts = #{bookCounts},
        set detail = #{detail}
        where bookID = #{bookId}
    </update>

    <select id="queryBookById" resultType="Books">
        select * from ssmbuild.books
        where bookID = #{bookId}
    </select>

    <select id="queryAllBooks" resultType="Books">
        select * from ssmbuild.books
    </select>
</mapper>

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
       http://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:db.properties"/>

    <!--2、连接池
        dbcp: 半自动化，不能自己连接
        c3p0:自动化（自动化加载配置文件，并且自动设置到对象中）
        druid : hikari:
    -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}}"/>
        <property name="jdbcUrl" value="${jdbc.url}}"/>
        <property name="user" value="${jdbc.username}}"/>
        <property name="password" value="${jdbc.password}"/>
        <!--c3p0连接池私有属性-->
        <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、sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--绑定mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!--4、配置dao接口扫描包，动态实现Dao接口可以注入到容器中-->
    <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.min.dao"/>
    </bean>
</beans>

mapper实现另外两种方式

实现类继承SqlSessionDaoSupport

public class BookMapperImpl extends SqlSessionDaoSupport implements BookMapper {
    public int addBook(Books book) {
        return getSqlSession().getMapper(BookMapperImpl.class).addBook(book);
    }
}

spring-dao.xml中配置4 要做如下调整

<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
    <!--只能使用构造器注入，源码分析没有set方法-->
    <constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>

<bean id="userMapper" class="com.min.mapper.UserMapperImpl">
    <!--需要提供SqlSessionDaoSupport的父类需要的sqlSessionFactory对象-->
    <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>

实现类使用SqlSessionTemplate对象

public class BookMapperImpl implements BookMapper {
    private SqlSessionTemplate sessionTemplate;

    public void setSessionTemplate(SqlSessionTemplate sessionTemplate) {
        this.sessionTemplate = sessionTemplate;
    }

    public int addBook(Books book) {
        return sessionTemplate.getMapper(BookMapperImpl.class).addBook(book);
    }
}

spring-dao.xml中配置4 要做如下调整

<bean id="sessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
    <!--只能使用构造器注入，源码分析没有set方法-->
    <constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>

<bean id="userMapper" class="com.min.mapper.UserMapperImpl">
    <property name="sqlSession" ref="sqlSession"/>
</bean>

service

BookService接口

@Service
public interface BookService {
    //增加一本书
    public int addBook(Books book);

    //删除一本书
    public int deleteBookById(@Param("bookId") int id);

    //更新一本书
    public int updateBook(Books book);

    //查询一本书
    public Books queryBookById(@Param("bookId") int id);

    //查询所有的书
    public List<Books> queryAllBooks();
}

BookServiceImpl实现类

public class BookServiceImpl implements BookService {
    //service 调用 dao
    private BookMapper bookMapper;

    public void setBookMapper(BookMapper bookMapper) {
        this.bookMapper = bookMapper;
    }

    public int addBook(Books book) {
        return bookMapper.addBook(book);
    }

    public int deleteBookById(int id) {
        return bookMapper.deleteBookById(id);
    }

    public int updateBook(Books book) {
        return bookMapper.updateBook(book);
    }

    public Books queryBookById(int id) {
        return bookMapper.queryBookById(id);
    }

    public List<Books> queryAllBooks() {
        return bookMapper.queryAllBooks();
    }
}

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 http://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.min.service"/>

    <!--2、将我们所有的业务类，注入到Spring，可以通过配置或注解实现-->
    <bean id="BookServiceImpl" class="com.min.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

    <!--3、声明式事务-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--4、aop事务支持-->
    <!--结合AOP实现事务的织入-->
    <!--配置事务通知-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <!--给哪些方法配置事务-->
        <!--配置事务的传播特性: new  propagation-->
        <tx:attributes>
            <tx:method name="*" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>

    <!--配置事务切入-->
    <aop:config>
        <aop:pointcut id="txPointCut" expression="execution(* com.min.dao.*.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
    </aop:config>
</beans>

view层

web

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>首页</title>

    <style>
      a{
        text-decoration: none;
        color: black;
        font-size: 18px;
      }
      h3{
         180px;
        height: 38px;
        margin: 100px auto;
        text-align: center;
        line-height: 38px;
        background-color: deepskyblue;
        border-radius: 5px;
      }
    </style>
  </head>
  <body>
    <h3>
      <a href="${pageContext.request.contextPath}/book/allBooks">进入数据展示页面</a>
    </h3>
  </body>
</html>

addBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>addBook</title>

    <%--BootStrap美化界面--%>
    <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">

</head>
<body>
<div class="container">

    <div class="row clearfix"><%--清除浮动--%>
        <div class="col-md-12 column"><%--栅格 共12栏--%>
            <h1>
                <small>新增书籍</small>
            </h1>
        </div>
    </div>

    <form action="${pageContext.request.contextPath}/book/addBook" method="post">
        <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>

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>allBooks.jsp</title>

    <%--BootStrap美化界面--%>
    <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">

</head>
<body>

<div class="container">

    <div class="row clearfix"><%--清除浮动--%>
        <div class="col-md-12 column"><%--栅格 共12栏--%>
            <h1>
                <small>数据列表------展示所有书籍</small>
            </h1>
        </div>
        <div class="col-md-4 column">
            <%--toAddBook--%>
            <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
        </div>
        <div class="col-md-8 column">
            <%--查询书籍--%>
            <form class="form-inline" action="${pageContext.request.contextPath}/book/queryByName" method="post" style="float: right">
                <span style="color: red;font-weight: bold">${msg}</span>
                <input type="text" name="bookName" class="form-control" placeholder="请输入要查询的书籍名称">
                <input type="submit" value="查询" class="btn btn-primary">
            </form>
        </div>
    </div>

    <div class="row clearfix"><%--清除浮动--%>
        <div class="col-md-12 column"><%--栅格 共12栏--%>
            <table class="table table-hover table-striped"><%--table-hover隔行变色--%>
                <thead>
                    <tr>
                        <th>书籍编号</th>
                        <th>书籍名称</th>
                        <th>书籍数量</th>
                        <th>书籍详情</th>
                        <th>操作</th>
                    </tr>
                </thead>

                <%--书籍从数据库中查询出来,从这个list中遍历出来:foreach--%>
                <tbody>
                    <tr>
                        <c:forEach var="book" items="${list}">
                            <tr>
                                <td>${book.bookID}</td>
                                <td>${book.bookName}</td>
                                <td>${book.bookCounts}</td>
                                <td>${book.detail}</td>
                                <td>
                                    <a href="${pageContext.request.contextPath}/book/toUpdateBook/${book.bookID}">修改</a>
                                    &nbsp;|&nbsp;<a href="${pageContext.request.contextPath}/book/deleteBook/${book.bookID}">删除</a>
                                </td>
                            </tr>
                        </c:forEach>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>

</div>

</body>
</html>

updateBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>updateBook</title>

    <%--BootStrap美化界面--%>
    <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">

</head>
<body>
<div class="container">

    <div class="row clearfix"><%--清除浮动--%>
        <div class="col-md-12 column"><%--栅格 共12栏--%>
            <h1>
                <small>更新书籍</small>
            </h1>
        </div>
    </div>

    <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
        <div class="form-group" hidden="hidden">
            <label >书籍编号:</label>
            <input type="text" name="bookID" class="form-control" value="${qBook.bookID}" />
        </div>
        <div class="form-group">
            <label >书籍名称:</label>
            <input type="text" name="bookName" class="form-control" value="${qBook.bookName}" required/>
        </div>
        <div class="form-group">
            <label >书籍数量:</label>
            <input type="text" name="bookCounts" class="form-control" value="${qBook.bookCounts}" required/>
        </div>
        <div class="form-group">
            <label >书籍描述:</label>
            <input type="text" name="detail" class="form-control" value="${qBook.detail}" required/>
        </div>
        <div class="form-group">
            <input type="submit" class="form-control" value="更新">
        </div>
    </form>
</div>
</body>
</html>

web.xml

<?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">

    <!--1、DispatcherServlet-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--初始化web配置-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <!--启动级别-->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
    <!--2、乱码过滤-->
    <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>

    <!--3、Session超时-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>

Controller层

controller

BookController

@Controller
@RequestMapping("/book")
public class BookController {
    // controller 调用 Service
    @Autowired
    @Qualifier("BookServiceImpl")
    private BookService bookService;

    public void setBookService(BookService bookService) {
        this.bookService = bookService;
    }

    //查询全部书籍，返回到书籍展示页面
    @RequestMapping("/allBooks")
    public String list(Model model){
        List<Books> books = bookService.queryAllBooks();
        model.addAttribute("list",books);
        return "allBooks";
    }

    //去新增书籍
    @RequestMapping("/toAddBook")
    public String addBook(Model model){
        return "addBook";
    }

    //新增书籍
    @RequestMapping("/addBook")
    public String addBook(Books books){
        System.out.println("addBook => " + books);
        bookService.addBook(books);
        return "redirect:/book/allBooks"; // 重定向到@RequestMapping("/allBooks")请求
    }

    //去更新书籍
    @RequestMapping("/toUpdateBook/{bookID}")
    public String updateBook(@PathVariable int bookID, Model model){
        Books books = bookService.queryBookById(bookID);
        model.addAttribute("qBook", books);
        return "updateBook";
    }

    //新增书籍
    @RequestMapping("/updateBook")
    public String updateBook(Books books){
        System.out.println("updateBook => " + books);
        bookService.updateBook(books);
        return "redirect:/book/allBooks"; // 重定向到@RequestMapping("/allBooks")请求
    }

    //删除书籍
    @RequestMapping("/deleteBook/{bookID}")
    public String deleteBook(@PathVariable int bookID){
        System.out.println("deleteID => " + bookID);
        bookService.deleteBookById(bookID);
        return "redirect:/book/allBooks";
    }

    //根据名称查询书籍
    @RequestMapping("/queryByName")
    public String queryBooksByName(String bookName, Model model){
        System.out.println("bookName => " + bookName);
        model.addAttribute("msg", "");
        if(bookName == null || bookName.equals("")){
            model.addAttribute("msg", "请输入要查询书籍名称");
            List<Books> books = bookService.queryAllBooks();
            model.addAttribute("list", books);
        }else{
            List<Books> books = bookService.queryBooksByName(bookName);
            model.addAttribute("list", books);
        }
        return "allBooks";
    }
}

spring-mvc.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
       https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.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.min.controller"/>
    
    <!--4、视图解析器-->
    <bean 			class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--前缀-->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!--后缀-->
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

spring主配置

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 https://www.springframework.org/schema/context/spring-context.xsd">
  
      <import resource="classpath:spring-dao.xml"/>
      <import resource="classpath:spring-service.xml"/>
      <import resource="classpath:spring-mvc.xml"/>
  </beans>

整合中的错误及解决方案笔记

问题：service层bean不存在

步骤：
1、看这个bean注入是否成功
2、junit单元测试，看代码是否可以查询到结果
3、问题出在Spring
4、springMVC整合时没有调用到service的bean
    1、applicationContext.xml 没有注入bean
    2、web.xml中，我们也绑定过配置文件，发现配置的是mvc.xml

    解决方式：web.xml中引用spring核心配置文件！

问题：更新操作提交更新的SQL，但是修改失败
1、初次考虑是事务问题，显式声明事务后依旧失败
2、查看sql语句打印结果，没有传送id

    解决方式：前端隐藏域传递id

问题：29-May-2020 14:13:14.568 严重 [http-nio-8080-exec-4]
    org.springframework.web.servlet.FrameworkServlet.
    initServletBean Context initialization failed
       org.springframework.beans.factory.BeanCreationException:
       Error creating bean with name 'sqlSessionFactory'
       defined in class path resource [spring-dao.xml]:
       Invocation of init method failed; nested exception
       is org.springframework.core.NestedIOException:
       Failed to parse config resource: class path resource
       [mybatis-config.xml]; nested exception is
       org.apache.ibatis.builder.BuilderException:
       Error parsing SQL Mapper Configuration.
       Cause: org.apache.ibatis.builder.BuilderException:
       The setting lohImpl is not known.
       Make sure you spelled it correctly (case sensitive).
1、检查spring-dao.xml的配置文件引用，没有问题
2、检查mybatis-config.xml配置，发现setting中新增日志书写问题

    解决方式：<setting name="logImpl" value="STDOUT_LOGGING"/>书写错误处理

问题：模糊查询拼接问题

	解决方式：1、在调用处手动的去添加“%”通配符
			2、%#{bookName}%程序会报错，原因是：缺少单引号。
			3、‘%#{bookName}%’程序依然会报错，原因是：如果加上单引号，那么就当成是一个字符串，而#{ }写在字符串中不能识别，要改写成${ }这种形式
			4、借助mysql的函数concat('%',#{bookName},'%')

问题：applicationContext配置包扫描

    解决方式：<!--自动扫描指定的包，包中的所有注解交由Spring管理-->
         <context:component-scan base-package="com.min.controller"/>

问题：com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException:
    1 字节的 UTF-8 序列的字节 1 无效。

    解决方式：<?xml version="1.0" encoding="GBK"?>修改配置文件字符集GBK

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原文地址：https://www.cnblogs.com/bky-min/p/12995011.html

ssm框架整合，个人学习记录

SSM框架整合

model层

view层

Controller层

spring主配置

整合中的错误及解决方案 笔记

整合中的错误及解决方案笔记