Spring框架总结（9）

SSM整合&PageHelper&mybatis-generator

整合ssm
1. SpringMVC
  1. web.xml
    1. 字符编码：CharacterEncodingFilter
    2. 前端控制器：DispatcherServlet
    3. 关联Spring：ContextLoaderListener
  2. example-servlet.xml
    1. 扫描控制器：<context:component-scan>
    2. 加载Annotation驱动：<mvc:annotation-driven>
    3. 视图解析器：InternalResourceViewResolver
    4. 访问静态资源：<mvc:default-servlet-handler/>，<mvc:resources>
    5. 文件上传解析器：CommonsMultipartResolver
2. Spring
  1. applicationContext.xml
    1. 扫描包：<context:component-scan>
    2. 连接池：ComboPooledDataSource
    3. 事务管理器：DataSourceTransactionManager
    4. 加载Annotation驱动：<tx:annotation-driven/>
    5. JDBC模板：JdbcTemplate
3. Mybatis
  1. mapper
整合步骤
1. 创建maven工程，导入pom文件
2. 先整合SpringMVC
  1. web.xml
  2. example-servlet.xml
  3. 编写Handler，jsp，进行局部测试
3. 整合Spring和mybatis
  1. applicationContext.xml
4. 创建dao，mapper，service
  1. Junit进行局部测试
  2. Handler装配service实现相应功能，整合完毕
mybatis的分页插件PageHelper
1. 导包：（建议版本4.1.6【我使用最高版本报错】）
  <dependency>
     <groupId>com.github.pagehelper</groupId>
     <artifactId>pagehelper</artifactId>
     <version>4.1.6</version>
     </dependency>
2. 配置到applicationContext.xml
  
         <property name="plugins">
             <array>
                 <bean class="com.github.pagehelper.PageHelper">
                     <property name="properties">
                         <value>
                             dialect=mysql
                             reasonable=true
                         </value>
                     </property>
                 </bean>
             </array>
         </property>
3. Handler代码编写
  @RequestMapping("/getAll/{page}")
     public String getAll(Map<String,Object> map,@PathVariable("page") Integer page) {
  
         PageHelper.startPage(page, 5);
         List<Book> list = bookService.getAll();
         PageInfo<Book> pageInfo = new PageInfo<Book>(list);
         map.put("pageInfo", pageInfo);
         return "bookList";
     }
4. JSP代码编写
  <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
  <table border="1" align="center" width="80%">
         <tr>
             <td>序号</td>
             <td>书名</td>
             <td>价格</td>
             <td>操作</td>
         </tr>
         <c:forEach items="${pageInfo.list }" var="book" varStatus="state">
             <tr>
                 <td>${state.count }</td>
                 <td>${book.name }</td>
                 <td>${book.price }</td>
                 <td>假装有操作</td>
             </tr>
         </c:forEach>
     </table>
     <div align="center">
         总页数：${pageInfo.pages },总记录数：${pageInfo.total },当前页：${pageInfo.pageNum }
     </div>
     <div align="center">
         <a href="${pageInfo.firstPage }">首页</a> |
         <a href="${pageInfo.prePage }">上一页</a> |
         <a href="${pageInfo.nextPage }">下一页</a> |
         <a href="${pageInfo.lastPage }">尾页</a>
     </div>
mybatis-generator
1. 代码生成器，根据表生成
  1. vo
  2. mapper
  3. dao
2. 具体使用步骤
  1. 新建一个maven工程，专门用来生成以上相关代码
  2. 导包
    <dependencies>
       <dependency>
           <groupId>org.mybatis</groupId>
           <artifactId>mybatis</artifactId>
           <version>3.4.6</version>
       </dependency>
       <dependency>
           <groupId>mysql</groupId>
           <artifactId>mysql-connector-java</artifactId>
           <version>5.1.36</version>
       </dependency>
       <dependency>
           <groupId>org.mybatis.generator</groupId>
           <artifactId>mybatis-generator-core</artifactId>
           <version>1.3.7</version>
       </dependency>
       <dependency>
           <groupId>log4j</groupId>
           <artifactId>log4j</artifactId>
           <version>1.2.17</version>
       </dependency>
    </dependencies>
    <build>
       <finalName>${project.artifactId}</finalName>
       <plugins>
           
           <plugin>
               <groupId>org.apache.maven.plugins</groupId>
               <artifactId>maven-compiler-plugin</artifactId>
               <version>3.2</version>
               <configuration>
                   <source>1.8</source>
                   <target>1.8</target>
                   <encoding>UTF-8</encoding>
               </configuration>
           </plugin>
       </plugins>
    </build>
  3. 配置conf.xml
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE generatorConfiguration
    PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
    "http://mybatis.org/dtd/mybatis-generator-config_1.0.dtd">
    
    <generatorConfiguration>
       <context id="testTables" targetRuntime="MyBatis3">
           <commentGenerator>
               
               <property name="suppressAllComments" value="true"/>
           </commentGenerator>
    
           
           <jdbcConnection driverClass="com.mysql.jdbc.Driver"
               connectionURL="jdbc:mysql://localhost:3306/mytest"
               userId="root"
               password="root">
           </jdbcConnection>
    
           
           <javaTypeResolver>
               <property name="forceBigDecimals" value="false" />
           </javaTypeResolver>
    
           
           <javaModelGenerator targetPackage="com.oracle.vo"
               targetProject=".\src\main\java">
               
               <property name="enableSubPackages" value="false" />
               
               <property name="trimStrings" value="true" />
           </javaModelGenerator>
    
           
           <sqlMapGenerator targetPackage="com.oracle.mapper"
               targetProject=".\src\main\resources">
               
               <property name="enableSubPackages" value="false" />
           </sqlMapGenerator>
    
           
           <javaClientGenerator type="XMLMAPPER"
               targetPackage="com.oracle.dao"
               targetProject=".\src\main\java">
               
               <property name="enableSubPackages" value="false" />
           </javaClientGenerator>
    
           
           <table schema="" tableName="book"></table>
           <table schema="" tableName="account"></table>
    
           
           
       </context>
    </generatorConfiguration>
  4. 创建包com.oracle.main，包下创建Generator.java
    package com.oracle.main;
    
    import java.io.File;
    import java.util.ArrayList;
    import java.util.List;
    
    import org.mybatis.generator.api.MyBatisGenerator;
    import org.mybatis.generator.config.Configuration;
    import org.mybatis.generator.config.xml.ConfigurationParser;
    import org.mybatis.generator.internal.DefaultShellCallback;
    
    public class Generator {
    
       public void generator() throws Exception{
    
           List<String> warnings = new ArrayList<String>();
           boolean overwrite = true;
           // 指定逆向工程配置文件
           File configFile = new File("src/main/resources/conf.xml");
           System.out.println(configFile.getAbsolutePath());
           ConfigurationParser cp = new ConfigurationParser(warnings);
           Configuration config = cp.parseConfiguration(configFile);
           DefaultShellCallback callback = new DefaultShellCallback(overwrite);
           MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
           myBatisGenerator.generate(null);
       }
       /**
       * 主函数
       */
       public static void main(String[] args) {
           try {
               Generator generatorSqlmap = new Generator();
               generatorSqlmap.generator();
           } catch(Exception e) {
               e.printStackTrace();
           }
       }
    }
  5. 执行这个带有主方法的类，刷新工程，会发现conf中指定生成的表被生成出如图所示诸多代码及对应文件夹/包
  6. 将想要使用的vo，dao，mapper拷贝到正在做的工程下对应文件夹/包下，即可使用
  7. dao中生成了多种操作，example则是多种条件，基本够用了。
  8. 只需编写对应的Service和Handler，例如：
    
    @Service
    public class AccountService {
    
       @Autowired
       AccountMapper accountDao;
    
       @Transactional
       public int insert(Account record) {
    
           return accountDao.insert(record);
       }
    
       @Transactional
       public List<Account> selectByExample(AccountExample example){
    
           return accountDao.selectByExample(example);
       }
    }
    
    @Controller
    public class AccountHandler {
    
       @Autowired
       AccountService accountService;
       @RequestMapping("/saveAccount")
       public String save() {
    
           Account record = new Account();
           record.setAccountid(8);
           record.setName("sdiven");
           record.setRemain(100000);
           accountService.insert(record);
           return "success";
       }
    
       @RequestMapping("/getAccount")
       public String getAccount() {
           AccountExample example = new AccountExample();
           example.createCriteria().andRemainGreaterThan(8000).andAccountidBetween(3, 9);
           List<Account> list = accountService.selectByExample(example);
           System.out.println(list);
           return "success";
       }
    }

Spring框架总结（9）

SSM整合&PageHelper&mybatis-generator

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