springMVC + mybatis 搜索 分页等

mybatis-3.0.5
spring-core-3.2.0.RELEASE
等
MyBatis3+Spring3
当前Spring版本(3.0.5)中未提供对MyBatis3的支持
使用第三方jar包进行整合(mybatis-spring-1.0.1.jar)

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1.配置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_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>springmvc</display-name>

  <!-- 字符集过滤器 -->
  <filter>
      <filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- SpringMVC中央控制器 -->
  <servlet>
      <servlet-name>mvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
      <servlet-name>mvc</servlet-name>
      <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!-- Spring容器 -->
  <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:applicationContext*.xml</param-value>
  </context-param>

</web-app>

新建etc文件夹中配置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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"
>

    <context:component-scan base-package="com.kaishengit">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 配置数据源 -->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="url" value="${jdbc.url}"/>
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="username" value="${jdbc.name}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="minIdle" value="5"/>
        <property name="maxActive" value="10"/>
        <property name="maxWait" value="5000"/>
    </bean>

    <!-- 重新由以前的hibernate管理器变回最原始的JDBC事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager"/>

    <!-- MyBatis SessionFactory -->
    <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- 别名都放在哪个包里面 -->
        <property name="typeAliasesPackage" value="com.kaishengit.pojo"/>
    </bean>

    <!-- MyBatis 自动扫描Mapper -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.kaishengit.dao"/>
    </bean>

</beans>

etc中配置ehcache.xml和jdbc.properties

<?xml version="1.0" encoding="UTF-8"?>
<ehcache>

    <diskStore path="java.io.tmpdir"/>

    <defaultCache
        maxElementsInMemory="1000"
        eternal="false"
        timeToIdleSeconds="120"
        timeToLiveSeconds="120"
        overflowToDisk="true"
    />

    <!--
    <cache name="com.kaishengit.pojo.User"
        maxElementsInMemory="100"
        eternal="false"
        timeToIdleSeconds="120"
        timeToLiveSeconds="120"
        overflowToDisk="true"
    />
     -->

</ehcache>

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///book?useUnicode=yes&characterEncoding=UTF-8
jdbc.name=root
jdbc.password=root

WEB-INF中配置mvc-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"
       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 http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

    <context:component-scan base-package="com.kaishengit.controller"/>

    <mvc:annotation-driven/>

    <!-- 静态资源 -->
    <mvc:resources location="/static/" mapping="/static/**"/>

    <mvc:view-controller path="/" view-name="index"/>

    <!-- 视图解析器 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!-- 文件上传解析器 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="1000000000"/>
    </bean>

    <!-- 异常处理 -->
    <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
        <property name="exceptionMappings">
            <props>
                <prop key="com.kaishengit.exception.LoginException">redirect:/</prop>
            </props>
        </property>
    </bean>

    <!-- 拦截器配置 -->
    <mvc:interceptors>

        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <bean class="com.kaishengit.controller.interceptor.LoginInterceptor">
                <property name="execludeUrls">
                    <list>
                        <value></value>
                        <value>/</value>
                        <value>/login</value>
                    </list>
                </property>
            </bean>
        </mvc:interceptor>

    </mvc:interceptors>

</beans>

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 对于springmvc+mybatis的表单搜索

加q_是因为有的搜索不用提交

<div class="well">
    <form action="/book" method="get" class="form-search">
        <input type="text" name="q_name" placeholder="书籍名称" value="${q_name }"/>
        <input type="text" name="q_publish" placeholder="出版社" value="${q_publish }"/>
        <input type="text" name="q_author" placeholder="作者" value="${q_author }"/>
        <button class="btn btn-success">搜索</button>
    </form>
</div>

表单提交到bookcontroller中

@Controller
@RequestMapping("/book")
public class BookController {

    @Inject
    private BookService bookService;
    // 没有指定请求路径的时候默认就是namespace的路径
    @RequestMapping(method=RequestMethod.GET)
    public String list(@PathVariable Integer page,Model model,HttpServletRequest request) {
        model.addAttribute("bookList", bookService.findAll(ServletUtil.builderParamMapByRequest(request)));
        return "book/list";
    }

}

写一个工具类

public class ServletUtil {

    public static Map<String, Object> builderParamMapByRequest(HttpServletRequest request) {
        Map<String, Object> map = new HashMap<String, Object>();
        //获取表单中的搜索数据
        Enumeration<String> reqNames = request.getParameterNames();
        while(reqNames.hasMoreElements()) {
            String name = reqNames.nextElement();
            String value = request.getParameter(name);

            if(name.startsWith("q_")) {
                try {
                    // 表单的数据传到url中会有乱码,转码
                    value = new String(value.getBytes("ISO8859-1"),"UTF-8");
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
                map.put(name, value);

                /* 将这些值放入request中,方便在查询完成之后表单中能获取这些值
                    如果不这样做,而是直接从url中获取会有乱码问题
                        这样就需要在页面上进行转码,所有的都要转码,这样比较麻烦--
                        <%
                            String name = request.getParameter("q_name");
                            if(name != null){
                                name = new String(name.getBytes("ISO8859-1"),"UTF-8");
                                pageContext.setAttribute("name",name);
                            }
                        然后再页面上用value="${pageScope.name }"取值
                        %>*/
                request.setAttribute(name, value);
            }
        }
        return map;
    }
}

将这个map给bookService.findAll()中

public List<Book> findAll(Map<String, Object> map) {
    return bookDao.findByParam(map);
}

然后在bookdao.xml中配置这个查询方法

<?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.kaishengit.dao.BookDao">

    <insert id="save" parameterType="Book">
        INSERT INTO book(CODE,NAME,author,publish,total,nowcount) VALUES(#{code},#{name},#{author},#{publish},#{total},#{nowcount})
    </insert>

    <select id="findByParam" parameterType="map" resultType="list" resultMap="bookMap">
        select * from book
        <where>
            <!-- 当url中有值的时候在加上这些sql -->
            <if test="q_name != null and q_name != ''">
                name like = #{q_name}
            </if>
            <if test="q_author != null and q_author != ''">
                and author = #{q_author}
            </if>
            <if test="q_publish != null and q_publish != ''">
                and publish = #{q_publish}
            </if>
        </where>

    </select>

    <resultMap type="Book" id="bookMap">
        <id property="id" column="id"/>
        <result property="name" column="name"/>
        <result property="author" column="author"/>
        <result property="publish" column="publish"/>
        <result property="total" column="total"/>
        <result property="nowcount" column="nowcount"/>
        <result property="code" column="code"/>
    </resultMap>

</mapper>

<!-- 但是如果是like查询,就要这样加name like = '%${q_name}%'
    因为用#是默认加上了单引号,没法加单引号,所以要用$-->
<select id="findByParam" parameterType="map" resultType="list" resultMap="bookMap">
        select * from book
        <where>
            <!-- 当url中有值的时候在加上这些sql -->
            <if test="q_name != null and q_name != ''">
                name like = '%${q_name}%'
            </if>
            <if test="q_author != null and q_author != ''">
                and author = #{q_author}
            </if>
            <if test="q_publish != null and q_publish != ''">
                and publish = #{q_publish}
            </if>
        </where>

    </select>

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分页

bookcontroller中

@RequestMapping(method=RequestMethod.GET)
public String list(@RequestParam(required=false,defaultValue="1")int page,Model model,HttpServletRequest request) {
    model.addAttribute("bookList", bookService.findAll(ServletUtil.builderParamMapByRequest(request),page));
    return "book/list";
}

在bookservice中

public List<Book> findAll(Map<String, Object> map, int page) {
    // 指定一页多少个
    int pageCount = 2;
    // 指定起始数据
    int start = (page-1) * pageCount;

    map.put("start", start);
    return bookDao.findByParam(map);
}

bookdao.xml中

<?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.kaishengit.dao.BookDao">

    <insert id="save" parameterType="Book">
        INSERT INTO book(CODE,NAME,author,publish,total,nowcount) VALUES(#{code},#{name},#{author},#{publish},#{total},#{nowcount})
    </insert>

    <select id="findByParam" parameterType="map" resultType="list" resultMap="bookMap">
        select * from book
        <where>
            <if test="q_name != null and q_name != ''">
                name like '%${q_name}%'
            </if>
            <if test="q_author != null and q_author != ''">
                and author = #{q_author}
            </if>
            <if test="q_publish != null and q_publish != ''">
                and publish = #{q_publish}
            </if>
        </where>
        <choose>
            <when test="start == null or start == ''">
                limit 0,2
            </when>
            <otherwise>
                limit #{start},2
            </otherwise>
        </choose>

    </select>

    <resultMap type="Book" id="bookMap">
        <id property="id" column="id"/>
        <result property="name" column="name"/>
        <result property="author" column="author"/>
        <result property="publish" column="publish"/>
        <result property="total" column="total"/>
        <result property="nowcount" column="nowcount"/>
        <result property="code" column="code"/>
    </resultMap>

</mapper>

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以下仅供了解

如果觉得url丑陋,分页还要用? 想用/book/1 这中形式
bookcontroller中
这个时候就必须传过来一个页数,所以要加上value="/{page:\\d+}",不能用之前的没有指定路径直接用namespace的路径-->
@RequestMapping(value="/{page:\\d+}",method=RequestMethod.GET)
 获取url的动态值用@PathVariable Integer page 
public String list(@PathVariable int page,Model model,HttpServletRequest request) {
model.addAttribute("bookList", bookService.findAll(ServletUtil.builderParamMapByRequest(request),page));
return "book/list";
}

用这种方式虽然能得到分页的效果,但是如果在这个基础上在进行搜索还是会在后面加上?
而且
<div class="well">
<form action="/book" method="get" class="form-search">
<input type="text" name="q_name" placeholder="书籍名称" value="${q_name }"/>
<input type="text" name="q_publish" placeholder="出版社" value="${q_publish }"/>
<input type="text" name="q_author" placeholder="作者" value="${q_author }"/>
<button class="btn btn-success">搜索</button>
</form>
</div>
搜索提交到的是/book 也就是永远都是/book/1 都是第一页,当你点击第二页的时候
需要做到不只传过来一个页号${pageNo+1},还要讲第一页?后面的搜索条件也加进来
这样就比较麻烦/book/${pageNo+1}?xxxxx 所以还不如一开始就都用?传值