一直以来都想去写一写博文,记录一下自己的成长过程,因为拖延症一直都没有去写,而以往学过的知识,不用的就慢慢遗忘了.
我是一个菜鸟,但有一个大牛梦,若是有不妥当之处,还望大家不吝赐教!
1.添加jar
1 <dependency> 2 <groupId>org.springframework</groupId> 3 <artifactId>spring-context</artifactId> 4 <version>5.0.6.RELEASE</version> 5 </dependency> 6 7 <dependency> 8 <groupId>org.springframework</groupId> 9 <artifactId>spring-core</artifactId> 10 <version>5.0.6.RELEASE</version> 11 </dependency> 12 13 <dependency> 14 <groupId>org.springframework</groupId> 15 <artifactId>spring-beans</artifactId> 16 <version>5.0.6.RELEASE</version> 17 </dependency> 18 19 <dependency> 20 <groupId>org.springframework</groupId> 21 <artifactId>spring-web</artifactId> 22 <version>5.0.6.RELEASE</version> 23 </dependency> 24 25 <dependency> 26 <groupId>org.springframework</groupId> 27 <artifactId>spring-webmvc</artifactId> 28 <version>5.0.6.RELEASE</version> 29 </dependency> 30 31 <dependency> 32 <groupId>org.springframework</groupId> 33 <artifactId>spring-aop</artifactId> 34 <version>5.0.6.RELEASE</version> 35 </dependency> 36 37 <dependency> 38 <groupId>org.springframework</groupId> 39 <artifactId>spring-jdbc</artifactId> 40 <version>5.0.5.RELEASE</version> 41 </dependency> 42 43 <dependency> 44 <groupId>org.springframework</groupId> 45 <artifactId>spring-tx</artifactId> 46 <version>5.0.5.RELEASE</version> 47 </dependency> 48 49 <!-- Tomcat服务器 --> 50 <dependency> 51 <groupId>org.apache.tomcat</groupId> 52 <artifactId>tomcat-catalina</artifactId> 53 <version>8.5.2</version> 54 </dependency> 55 56 <!-- mybatis --> 57 <dependency> 58 <groupId>org.mybatis</groupId> 59 <artifactId>mybatis</artifactId> 60 <version>3.4.5</version> 61 </dependency> 62 63 <dependency> 64 <groupId>org.mybatis</groupId> 65 <artifactId>mybatis-spring</artifactId> 66 <version>1.3.1</version> 67 </dependency> 68 <!-- mysql --> 69 <dependency> 70 <groupId>mysql</groupId> 71 <artifactId>mysql-connector-java</artifactId> 72 <version>8.0.11</version> 73 </dependency> 74 <!--c3p0 --> 75 <dependency> 76 <groupId>com.mchange</groupId> 77 <artifactId>c3p0</artifactId> 78 <version>0.9.5.2</version> 79 </dependency> 80 81 <dependency> 82 <groupId>javax.servlet</groupId> 83 <artifactId>jstl</artifactId> 84 <version>1.2</version> 85 </dependency>
2.项目包结构图
3.代码
扩展AbstractAnnotationConfigDispatcherServletInitializer的任意类都会自动配置DisPatcher-Servlet和Spring应用上下文,Spring的应用上下文会位于程序的Servlet上下文之中
1.MyWebMVCInitializer 类
1 package org.great.config; 2 3 import javax.servlet.Filter; 4 5 import org.springframework.web.filter.CharacterEncodingFilter; 6 import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer; 7 8 public class MyWebMVCInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{ 9 10 @Override 11 protected Class<?>[] getRootConfigClasses() { 12 return new Class[] {RootConfig.class}; 13 } 14 15 @Override 16 protected Class<?>[] getServletConfigClasses() { 17 return new Class[] {WebConfig.class}; 18 } 19 20 21 @Override 22 protected String[] getServletMappings() { 23 return new String[] {"*.do"}; 24 } 25 26 /** 27 * 编码过滤器 28 */ 29 @Override 30 protected Filter[] getServletFilters() { 31 return new Filter[] {new CharacterEncodingFilter("utf-8")}; 32 } 33 }
2.WebConfig类
1 package org.great.config; 2 3 import org.springframework.context.annotation.Bean; 4 import org.springframework.context.annotation.ComponentScan; 5 import org.springframework.context.annotation.Configuration; 6 import org.springframework.web.servlet.ViewResolver; 7 import org.springframework.web.servlet.config.annotation.EnableWebMvc; 8 import org.springframework.web.servlet.view.InternalResourceViewResolver; 9 10 @Configuration 11 @EnableWebMvc // <mvc:annotation-driven> 12 @ComponentScan(basePackages= {"org.great.web"}) 13 public class WebConfig { 14 15 /** 16 * 配置视图解析器 17 * @return 18 */ 19 @Bean 20 public ViewResolver viewResolver() { 21 InternalResourceViewResolver internalResourceViewResolver = new InternalResourceViewResolver(); 22 internalResourceViewResolver.setPrefix("/WEB-INF/jsp/"); 23 internalResourceViewResolver.setSuffix(".jsp"); 24 return internalResourceViewResolver; 25 } 26 }
3.RootConfig类
1 package org.great.config; 2 3 import javax.sql.DataSource; 4 5 import org.mybatis.spring.SqlSessionFactoryBean; 6 import org.mybatis.spring.annotation.MapperScan; 7 import org.springframework.context.annotation.Bean; 8 import org.springframework.context.annotation.ComponentScan; 9 import org.springframework.context.annotation.Configuration; 10 import org.springframework.core.io.support.PathMatchingResourcePatternResolver; 11 import org.springframework.jdbc.datasource.DataSourceTransactionManager; 12 import org.springframework.transaction.annotation.EnableTransactionManagement; 13 14 import com.mchange.v2.c3p0.ComboPooledDataSource; 15 16 @Configuration 17 @ComponentScan(basePackages= {"org.great.service"}) 18 @MapperScan(basePackages= {"org.great.mapper"}) 19 @EnableTransactionManagement //<tx:annotation-driven/> 用于启动注解 事务 20 public class RootConfig { 21 22 23 @Bean 24 public DataSource dataSource() throws Exception{ 25 ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource(); 26 comboPooledDataSource.setDriverClass("com.mysql.jdbc.Driver"); 27 comboPooledDataSource.setJdbcUrl("jdbc:mysql://localhost:3306/test607?useSSL=false&serverTimezone=GMT"); 28 comboPooledDataSource.setUser("root"); 29 comboPooledDataSource.setPassword(""); 30 return comboPooledDataSource; 31 } 32 33 @Bean 34 public SqlSessionFactoryBean sqlSessionFactoryBean() throws Exception{ 35 SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean(); 36 sqlSessionFactoryBean.setDataSource(this.dataSource()); 37 PathMatchingResourcePatternResolver pathMatchingResourcePatternResolver = new PathMatchingResourcePatternResolver(); 38 sqlSessionFactoryBean.setMapperLocations(pathMatchingResourcePatternResolver.getResources("classpath:org/great/sql/*.xml")); 39 return sqlSessionFactoryBean; 40 } 41 42 @Bean 43 public DataSourceTransactionManager dataSourceTransactionManager() throws Exception{ 44 DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager(); 45 dataSourceTransactionManager.setDataSource(this.dataSource()); 46 return dataSourceTransactionManager; 47 } 48 49 // 使用@MapperScan(basePackages= {"org.great.mapper"})代替 50 /*@Bean 51 public MapperScannerConfigurer mapperScannerConfigurer() throws Exception{ 52 MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer(); 53 mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean"); 54 mapperScannerConfigurer.setBasePackage("org.great.mapper"); 55 return mapperScannerConfigurer; 56 }*/ 57 }
4.User实体类
1 package org.great.entity; 2 3 public class User { 4 5 private int id; 6 7 private String name; 8 9 private String age; 10 11 public int getId() { 12 return id; 13 } 14 15 public void setId(int id) { 16 this.id = id; 17 } 18 19 public String getName() { 20 return name; 21 } 22 23 public void setName(String name) { 24 this.name = name; 25 } 26 27 public String getAge() { 28 return age; 29 } 30 31 public void setAge(String age) { 32 this.age = age; 33 } 34 35 @Override 36 public String toString() { 37 return "User [id=" + id + ", name=" + name + ", age=" + age + "]"; 38 } 39 40 public User(int id, String name, String age) { 41 super(); 42 this.id = id; 43 this.name = name; 44 this.age = age; 45 } 46 47 public User() { 48 super(); 49 } 50 }
5.IUserMapper接口
1 package org.great.mapper; 2 3 import java.util.List; 4 5 import org.great.entity.User; 6 import org.springframework.stereotype.Repository; 7 8 @Repository 9 public interface IUserMapper { 10 11 public List<User> selectAllUser(); 12 13 public void insertUser(User user); 14 }
6.UserService类
1 package org.great.service; 2 3 import java.util.List; 4 5 import org.great.entity.User; 6 import org.great.mapper.IUserMapper; 7 import org.springframework.beans.factory.annotation.Autowired; 8 import org.springframework.stereotype.Service; 9 import org.springframework.transaction.annotation.Transactional; 10 11 @Service 12 public class UserService { 13 14 @Autowired 15 private IUserMapper iUserMapper; 16 17 public List<User> selectAllUserService() { 18 List<User> selectAllUser = iUserMapper.selectAllUser(); 19 return selectAllUser; 20 } 21 22 @Transactional 23 public void insertUserService() { 24 User user = new User(); 25 user.setName("王五"); 26 user.setAge("23"); 27 iUserMapper.insertUser(user); 28 } 29 }
7.UserControll类
1 package org.great.web; 2 3 import java.util.List; 4 5 import org.great.entity.User; 6 import org.great.service.UserService; 7 import org.springframework.beans.factory.annotation.Autowired; 8 import org.springframework.stereotype.Controller; 9 import org.springframework.ui.Model; 10 import org.springframework.web.bind.annotation.RequestMapping; 11 12 @Controller 13 public class UserController { 14 15 @Autowired 16 private UserService userService; 17 18 @RequestMapping("/firstView") 19 public String firstView(Model model) { 20 List<User> selectAllUserService = userService.selectAllUserService(); 21 model.addAttribute("userList", selectAllUserService); 22 return "home"; 23 } 24 25 @RequestMapping("/insertUser") 26 public String insertUser(Model model) { 27 userService.insertUserService(); 28 return "redirect:/firstView.do"; 29 } 30 }
8.User.xml配置文件
1 <?xml version="1.0" encoding="UTF-8"?> 2 3 <!DOCTYPE mapper 4 PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" 5 "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 6 7 <mapper namespace="org.great.mapper.IUserMapper"> 8 9 <resultMap type="org.great.entity.User" id="UserResult"> 10 <id column="id" jdbcType="INTEGER" property="id" /> 11 <result column="name" jdbcType="VARCHAR" property="name" /> 12 <result column="age" jdbcType="VARCHAR" property="age" /> 13 </resultMap> 14 15 <select id="selectAllUser" resultMap="UserResult"> 16 select * from user 17 </select> 18 19 <insert id="insertUser"> 20 insert into user (name,age) values(#{name},#{age}) 21 </insert> 22 23 </mapper>
9.home,jsp
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <%@ page isELIgnored="false" %> 4 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 5 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 6 <html> 7 <head> 8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 9 <title>Insert title here</title> 10 </head> 11 <body> 12 <table> 13 <tr> 14 <td>序号</td> 15 <td>名字</td> 16 <td>年龄</td> 17 </tr> 18 <c:forEach items="${userList}" var="user" varStatus="ind"> 19 <tr> 20 <td>${ind.count}</td> 21 <td>${user.name}</td> 22 <td>${user.age}</td> 23 </tr> 24 </c:forEach> 25 </table> 26 </body> 27 </html>