搭建SSM环境整合通用Mapper和PageHelper

新建Maven工程

填写项目的Maven坐标

创建父工程依赖 ssm-parent

修改ssm-parent 的 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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0modelVersion>
  <groupId>my.ssm.parentgroupId>
  <artifactId>ssm-parentartifactId>
  <version>0.0.1-SNAPSHOTversion>
  <packaging>pompackaging>

   
    <properties>
        <junit.version>4.10junit.version>
        <spring.version>4.1.3.RELEASEspring.version>
        <mybatis.version>3.2.8mybatis.version>
        <mybatis.spring.version>1.2.2mybatis.spring.version>
        <mybatis.paginator.version>1.2.15mybatis.paginator.version>
        <mysql.version>5.1.32mysql.version>
        <slf4j.version>1.6.4slf4j.version>
        <jackson.version>2.4.2jackson.version>
        <druid.version>1.0.9druid.version>
        <httpclient.version>4.3.5httpclient.version>
        <jstl.version>1.2jstl.version>
        <servlet-api.version>2.5servlet-api.version>
        <jsp-api.version>2.0jsp-api.version>
        <joda-time.version>2.5joda-time.version>
        <commons-lang3.version>3.3.2commons-lang3.version>
        <commons-io.version>1.3.2commons-io.version>
    properties>

    
    <dependencyManagement>
        <dependencies>
            
            <dependency>
                <groupId>junitgroupId>
                <artifactId>junitartifactId>
                <version>${junit.version}version>
                <scope>testscope>
            dependency>

            
            <dependency>
                <groupId>org.springframeworkgroupId>
                <artifactId>spring-contextartifactId>
                <version>${spring.version}version>
            dependency>
            <dependency>
                <groupId>org.springframeworkgroupId>
                <artifactId>spring-beansartifactId>
                <version>${spring.version}version>
            dependency>
            <dependency>
                <groupId>org.springframeworkgroupId>
                <artifactId>spring-webmvcartifactId>
                <version>${spring.version}version>
            dependency>
            <dependency>
                <groupId>org.springframeworkgroupId>
                <artifactId>spring-jdbcartifactId>
                <version>${spring.version}version>
            dependency>
            <dependency>
                <groupId>org.springframeworkgroupId>
                <artifactId>spring-aspectsartifactId>
                <version>${spring.version}version>
            dependency>

            
            <dependency>
                <groupId>org.mybatisgroupId>
                <artifactId>mybatisartifactId>
                <version>${mybatis.version}version>
            dependency>
            <dependency>
                <groupId>org.mybatisgroupId>
                <artifactId>mybatis-springartifactId>
                <version>${mybatis.spring.version}version>
            dependency>

            
            <dependency>
                <groupId>com.github.pagehelpergroupId>
                <artifactId>pagehelperartifactId>
                <version>3.7.5version>
            dependency>
            <dependency>
                <groupId>com.github.jsqlparsergroupId>
                <artifactId>jsqlparserartifactId>
                <version>0.9.1version>
            dependency>
            
            <dependency>
                <groupId>com.github.abel533groupId>
                <artifactId>mapperartifactId>
                <version>2.3.4version>
            dependency>

            
            <dependency>
                <groupId>mysqlgroupId>
                <artifactId>mysql-connector-javaartifactId>
                <version>${mysql.version}version>
            dependency>

            <dependency>
                <groupId>org.slf4jgroupId>
                <artifactId>slf4j-log4j12artifactId>
                <version>${slf4j.version}version>
            dependency>

            
            <dependency>
                <groupId>com.fasterxml.jackson.coregroupId>
                <artifactId>jackson-databindartifactId>
                <version>${jackson.version}version>
            dependency>

            
            <dependency>
                <groupId>com.jolboxgroupId>
                <artifactId>bonecp-springartifactId>
                <version>0.8.0.RELEASEversion>
            dependency>

            
            <dependency>
                <groupId>org.apache.httpcomponentsgroupId>
                <artifactId>httpclientartifactId>
                <version>${httpclient.version}version>
            dependency>

            
            <dependency>
                <groupId>jstlgroupId>
                <artifactId>jstlartifactId>
                <version>${jstl.version}version>
            dependency>
            <dependency>
                <groupId>javax.servletgroupId>
                <artifactId>servlet-apiartifactId>
                <version>${servlet-api.version}version>
                <scope>providedscope>
            dependency>
            <dependency>
                <groupId>javax.servletgroupId>
                <artifactId>jsp-apiartifactId>
                <version>${jsp-api.version}version>
                <scope>providedscope>
            dependency>

            
            <dependency>
                <groupId>joda-timegroupId>
                <artifactId>joda-timeartifactId>
                <version>${joda-time.version}version>
            dependency>

            
            <dependency>
                <groupId>org.apache.commonsgroupId>
                <artifactId>commons-lang3artifactId>
                <version>${commons-lang3.version}version>
            dependency>
            <dependency>
                <groupId>org.apache.commonsgroupId>
                <artifactId>commons-ioartifactId>
                <version>${commons-io.version}version>
            dependency>

        dependencies>
    dependencyManagement>

    <build>
        <finalName>${project.artifactId}finalName>
        <plugins>
            
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-resources-pluginartifactId>
                <version>2.7version>
                <configuration>
                    <encoding>UTF-8encoding>
                configuration>
            plugin>
            
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-compiler-pluginartifactId>
                <version>3.2version>
                <configuration>
                    <source>1.8source>
                    <target>1.8target>
                    <encoding>UTF-8encoding>
                configuration>
            plugin>
        plugins>
        <pluginManagement>
            <plugins>
                
                <plugin>
                    <groupId>org.apache.tomcat.mavengroupId>
                    <artifactId>tomcat7-maven-pluginartifactId>
                    <version>2.2version>
                plugin>
            plugins>
        pluginManagement>
    build>
project>

继承parent

继承parent之后，ssm项目可能会出现小红叉，解决方法如下：

继承parent之后可以发现，编译的jdk版本从1.5变为1.8：

默认创建的jdk版本为1.5，然而在ssm-parent中设置了编译的jdk版本。

子工程使用依赖

Parent中的依赖管理

修改ssm项目中的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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0modelVersion>
  <groupId>my.ssmgroupId>
  <artifactId>ssmartifactId>
  <version>0.0.1-SNAPSHOTversion>
  <packaging>warpackaging>
  <parent>
        <groupId>my.ssm.parentgroupId>
        <artifactId>ssm-parentartifactId>
        <version>0.0.1-SNAPSHOTversion>
  parent>

  <dependencies>
        
        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <scope>testscope>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webmvcartifactId>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-jdbcartifactId>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-aspectsartifactId>
        dependency>
        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatisartifactId>
        dependency>
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatis-springartifactId>
        dependency>
        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
        dependency>
        <dependency>
            <groupId>org.slf4jgroupId>
            <artifactId>slf4j-log4j12artifactId>
        dependency>
        
        <dependency>
            <groupId>com.fasterxml.jackson.coregroupId>
            <artifactId>jackson-databindartifactId>
        dependency>
        
        <dependency>
            <groupId>com.jolboxgroupId>
            <artifactId>bonecp-springartifactId>
        dependency>
        
        <dependency>
            <groupId>jstlgroupId>
            <artifactId>jstlartifactId>
        dependency>
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>servlet-apiartifactId>
            <scope>providedscope>
        dependency>
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>jsp-apiartifactId>
            <scope>providedscope>
        dependency>
        
        <dependency>
            <groupId>org.apache.commonsgroupId>
            <artifactId>commons-lang3artifactId>
        dependency>
        <dependency>
            <groupId>org.apache.commonsgroupId>
            <artifactId>commons-ioartifactId>
        dependency>
        <dependency>
            <groupId>com.github.pagehelpergroupId>
            <artifactId>pagehelperartifactId>
        dependency>
        <dependency>
            <groupId>com.github.jsqlparsergroupId>
            <artifactId>jsqlparserartifactId>
        dependency>
        <dependency>
            <groupId>com.github.abel533groupId>
            <artifactId>mapperartifactId>
        dependency>
    dependencies>

    <build>
        <plugins>
            
            <plugin>
                <groupId>org.apache.tomcat.mavengroupId>
                <artifactId>tomcat7-maven-pluginartifactId>
                <configuration>
                    <port>80port>
                    
                    <path>/path>
                configuration>
            plugin>
        plugins>
    build>
project>

运行tomcat插件

运行发现：

解决方法：需要把ssm-parent安装到本地仓库。

再次运行ssm项目，错误已经不在了。

配置Web.xml

在ssm工程中的webapp下面创建WEB-INF

然后在创建web.xml

<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>ssmdisplay-name>

    <context-param>
    
        <param-name>contextConfigLocationparam-name>
        <param-value>classpath:spring/applicationContext*.xmlparam-value>
    context-param>

    
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
    listener>

    
    
    <filter>
        <filter-name>encodingFilterfilter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
        <init-param>
            <param-name>encodingparam-name>
            <param-value>UTF8param-value>
        init-param>
    filter>
    <filter-mapping>
        <filter-name>encodingFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <filter>
        <filter-name>HttpMethodFilterfilter-name>
        <filter-class>org.springframework.web.filter.HttpPutFormContentFilterfilter-class>
    filter>
    <filter-mapping>
        <filter-name>HttpMethodFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <filter>
        <filter-name>HiddenHttpMethodFilterfilter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilterfilter-class>
    filter>
    <filter-mapping>
        <filter-name>HiddenHttpMethodFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <servlet>
        <servlet-name>my-ssmservlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
        <init-param>
            <param-name>contextConfigLocationparam-name>
            
            <param-value>classpath:spring/ssm-servlet.xmlparam-value>
        init-param>
         <load-on-startup>1load-on-startup>
         
    servlet>

    <servlet-mapping>
        <servlet-name>ssmservlet-name>
        
        <url-pattern>/rest/*url-pattern>
    servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.jspwelcome-file>
    welcome-file-list>

web-app>

配置数据库文件 Jdbc.properties

数据库表我们已经准备好了。

配置jdbc.properties文件：

Spring容器配置文件

接下来我们根据在web.xml配置的classpath:spring/applicationContext*.xml路径下创建spring的配置文件。

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    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-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    
    <bean
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        
        
        <property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE" />
        
        <property name="ignoreResourceNotFound" value="true" />
        
        <property name="locations">
            <list>
                <value>classpath:jdbc.propertiesvalue>
            list>
        property>
    bean>

    
    <context:component-scan base-package="my.ssm"/>

     
    <bean id="dataSource" class="com.jolbox.bonecp.BoneCPDataSource"
        destroy-method="close">
        
        <property name="driverClass" value="${jdbc.driverClassName}" />
        
        <property name="jdbcUrl" value="${jdbc.url}" />
        
        <property name="username" value="${jdbc.username}" />
        
        <property name="password" value="${jdbc.password}" />
        
        <property name="idleConnectionTestPeriod" value="60" />
        
        <property name="idleMaxAge" value="30" />
        
        
        <property name="maxConnectionsPerPartition" value="100" />
        
        <property name="minConnectionsPerPartition" value="5" />
    bean>

beans>

Spring事务

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    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-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    bean>

    
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            
            <tx:method name="query*" read-only="true" />
            
            <tx:method name="*" />
        tx:attributes>
    tx:advice>

    <aop:config>
        
        <aop:pointcut id="myPointcut" expression="execution(* my.ssm.service.*.*(..))" />
        
        <aop:advisor advice-ref="txAdvice" pointcut-ref="myPointcut" />
    aop:config>

beans>

SpringMVC配置文件

根据web.xml配置的classpath:spring/ssm-servlet.xml路径下我们来创建spring mvc的配置文件。

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    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-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    
    <mvc:annotation-driven/>

    
    <context:component-scan base-package="my.ssm.controller"/>

    
    
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    bean>

beans>

Mybatis和Spring的整合

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    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-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    <bean class="org.mybatis.spring.SqlSessionFactoryBean">
        
        <property name="dataSource" ref="dataSource"/>
        
        <property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/>
        
        
        
        <property name="typeAliasesPackage" value="my.ssm.pojo"/>
    bean>

    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="my.ssm.mapper"/>
    bean>

beans>

注意：配置mapper.xml文件暂时注释掉，因为现在我们还没有配置mapper.xml，这样启动会报错。

Mybatis的全局配置文件

配置通用mapper和pagehelper：

<configuration>

    <plugins>
        
        <plugin interceptor="com.github.pagehelper.PageHelper">
            <property name="dialect" value="mysql" />
            
            
            <property name="rowBoundsWithCount" value="true" />
        plugin>

        
        <plugin interceptor="com.github.abel533.mapperhelper.MapperInterceptor">
            
            <property name="IDENTITY" value="MYSQL" />
            
            <property name="mappers" value="com.github.abel533.mapper.Mapper" />
        plugin>

    plugins>

configuration>

导入jsp页面

通用页面跳转

package my.ssm.controller;

import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

/**
 * 通用的页面跳转逻辑
 * @author c
 *
 */
@RequestMapping("page")
@Controller
public class PageController {

    @RequestMapping(value = "{pageName}", method = RequestMethod.GET)
    public String toPage(@PathVariable("pageName") String pageName){
        return pageName;
    }
}

测试发现报错了：

我们看来详细的错误信息：

严重: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[]]
    at java.util.concurrent.FutureTask.report(Unknown Source)
    at java.util.concurrent.FutureTask.get(Unknown Source)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    ... 6 more
Caused by: java.lang.IllegalArgumentException: Servlet mapping specifies an unknown servlet name ssm
    at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3241)
    at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:3220)
    at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1367)
    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1346)
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:376)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5322)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 6 more

四月 29, 2018 11:01:09 下午 org.apache.catalina.core.ContainerBase startInternal
严重: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]
    at java.util.concurrent.FutureTask.report(Unknown Source)
    at java.util.concurrent.FutureTask.get(Unknown Source)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.startup.Tomcat.start(Tomcat.java:341)
    at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startContainer(AbstractRunMojo.java:1238)
    at org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(AbstractRunMojo.java:592)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:355)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:216)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:160)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:800)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 6 more

我们来定位到错误的地方：

重新修改之后：

现在我们加入log4j日志再来测试：

log4j.rootLogger=DEBUG,A1
log4j.logger.com.taotao = DEBUG
log4j.logger.org.mybatis = DEBUG

log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c]-[%p] %m%n

我们再次测试运行：

配置通用Mapper

配置通用Mapper的插件

User实体添加JPA注解

package my.ssm.pojo;

import java.util.Date;

import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Table(name = "tb_user")
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    // 用户名
    private String userName;

    // 密码
    private String password;

    // 姓名
    private String name;

    // 年龄
    private Integer age;

    // 性别，1男性，2女性
    private Integer sex;

    // 出生日期
    private Date birthday;

    // 创建时间
    private Date created;

    // 更新时间
    private Date updated;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getuserName() {
        return userName;
    }

    public void setuserName(String userName) {
        this.userName = userName;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    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 Integer getSex() {
        return sex;
    }

    public void setSex(Integer sex) {
        this.sex = sex;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    public Date getCreated() {
        return created;
    }

    public void setCreated(Date created) {
        this.created = created;
    }

    public Date getUpdated() {
        return updated;
    }

    public void setUpdated(Date updated) {
        this.updated = updated;
    }

    @Override
    public String toString() {
        return "User [id=" + id + ", userName=" + userName + ", password=" + password + ", name=" + name
                + ", age=" + age + ", sex=" + sex + ", birthday=" + birthday + ", created=" + created
                + ", updated=" + updated + "]";
    }

}

创建UserMapper接口

EasyUI的datagrid的数据结构

封装EasyUIResult

package my.ssm.bean;

import java.util.List;

public class EasyUIResult {

    private Long total;

    private List rows;

    public EasyUIResult() {

    }

    public EasyUIResult(Long total, List rows) {
        this.total = total;
        this.rows = rows;
    }

    public Long getTotal() {
        return total;
    }

    public void setTotal(Long total) {
        this.total = total;
    }

    public List getRows() {
        return rows;
    }

    public void setRows(List rows) {
        this.rows = rows;
    }

}

实现用户列表的查询

Controller实现

package my.ssm.controller;

import my.ssm.bean.EasyUIResult;
import my.ssm.service.UserService;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;


@Controller
@RequestMapping("user")
public class UserController {

    @Autowired
    private UserService userService;

    /**
     * 查询用户列表
     * 
     * @param page
     * @param rows
     * @return
     */
    @RequestMapping(value = "list", method = RequestMethod.GET)
    @ResponseBody
    public EasyUIResult queryUserList(@RequestParam("page") Integer page, @RequestParam("rows") Integer rows) {
        EasyUIResult easyUIResult = this.userService.queryUserList(page, rows);
        return easyUIResult;
    }

}

Service实现

配置分页助手：

使用分页助手：

package my.ssm.service;

import java.util.List;

import my.ssm.bean.EasyUIResult;
import my.ssm.mapper.UserMapper;
import my.ssm.pojo.User;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.github.abel533.entity.Example;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;

@Service
public class UserService {

    @Autowired
    private UserMapper userMapper;

    public EasyUIResult queryUserList(Integer page, Integer rows) {

        // 设置分页参数
        PageHelper.startPage(page, rows);

        // 查询User数据
        Example example = new Example(User.class);
        example.setOrderByClause("updated DESC"); // 设置排序条件
        List users = this.userMapper.selectByExample(example);

        // 获取分页后的信息
        PageInfo pageInfo = new PageInfo(users);

        return new EasyUIResult(pageInfo.getTotal(), pageInfo.getList());
    }

}

最终测试