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>
原文地址：https://www.cnblogs.com/ke609/p/9160453.html
时间： 2024-10-09 16:22:08