搭建SSM环境_注解版_基于maven的web项目详解
一.基本信息:
数据库
CREATE DATABASE webdemo001;
USE webdemo001;
CREATE TABLE t_student(
sid INT PRIMARY KEY AUTO_INCREMENT,
student_name VARCHAR(50),
age INT
);
INSERT INTO t_student(student_name,age) VALUES('jack',18);
INSERT INTO t_student(student_name,age) VALUES('rose',21);
JavaBean
@Table(name = "t_student")
public class Student {
@Id
private Integer sid;
@Column(name = "student_name")
private String studentName;
private Integer age;
@Override
public String toString() {
return "Student{" +
"sid=" + sid +
", studentName='" + studentName + '\'' +
", age=" + age +
'}';
}
public Integer getSid() {
return sid;
}
public void setSid(Integer sid) {
this.sid = sid;
}
public String getStudentName() {
return studentName;
}
public void setStudentName(String studentName) {
this.studentName = studentName;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public Student() {
}
public Student(Integer sid, String studentName, Integer age) {
this.sid = sid;
this.studentName = studentName;
this.age = age;
}
二.maven web项目：注解版
1. pom.xml坐标
ssm_all
com.czxy
1.0-SNAPSHOT
4.0.0
web_annotation
war
5.1.32
1.0.31
3.4.6
3.5.3
1.3.2
5.1.6.RELEASE
5.1.2
2.1
3.1.0
1.2
2.9.8
mysql
mysql-connector-java
${mysql.version}
com.alibaba
druid
${druid.version}
org.mybatis
mybatis
${mybatis.version}
tk.mybatis
mapper
${mapper.version}
org.mybatis
mybatis-spring
${mybatis.spring.version}
org.springframework
spring-context
${spring.version}
org.springframework
spring-aspects
${spring.version}
org.springframework
spring-jdbc
${spring.version}
org.springframework
spring-test
${spring.version}
com.github.pagehelper
pagehelper
${pagehelper.version}
org.springframework
spring-webmvc
${spring.version}
javax.servlet.jsp
jsp-api
${jsp.version}
provided
javax.servlet
javax.servlet-api
${servlet.version}
provided
javax.servlet
jstl
${jstl.version}
com.fasterxml.jackson.core
jackson-databind
${jackson.version}
org.apache.maven.plugins
maven-compiler-plugin
3.5.1
1.8
1.8
org.apache.tomcat.maven
tomcat7-maven-plugin
2.2
8080
/
2.配置类：MyBatis
MyBatisConfiguration .class
package com.czxy.webdemo.config;
import com.github.pagehelper.PageInterceptor;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.context.annotation.Bean;
import tk.mybatis.spring.mapper.MapperScannerConfigurer;
import javax.sql.DataSource;
import java.util.Properties;
public class MyBatisConfiguration {
/**
* 配置session工厂
* @param dataSource
* @return
* @throws Exception
*/
@Bean
public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception{
//1 创建 factoryBean
SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
//2 设置数据
// 2.1 数据源
factoryBean.setDataSource(dataSource);
// 2.2 驼峰命名
Configuration configuration = new Configuration();
configuration.setMapUnderscoreToCamelCase(true);
factoryBean.setConfiguration(configuration);
// 2.3 分页插件
Properties props = new Properties();
// 设置方言
props.setProperty("helperDialect", "mysql");
// 分页的同时进行count查询
props.setProperty("rowBoundsWithCount", "true");
// 分页合理化参数，pageNum<=0 时会查询第一页，pageNum>pages （超过总数时），会查询最后一页
props.setProperty("reasonable", "true");
PageInterceptor pageInterceptor = new PageInterceptor();
pageInterceptor.setProperties(props);
factoryBean.setPlugins(new Interceptor[] {pageInterceptor});
//3 通过factorybean获得对应
return factoryBean.getObject();
}
/**
* 映射扫描器
* @return
*/
@Bean
public MapperScannerConfigurer mapperScannerConfigurer(){
//1 创建
MapperScannerConfigurer mapperScanner = new MapperScannerConfigurer();
//2设置包
mapperScanner.setBasePackage("com.czxy.webdemo.mapper");
return mapperScanner;
}
}
3.配置类：Spring
db.properties 文件中配置数据相关信息
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/webdemo001
jdbc.username=root
jdbc.password=1234
SpringConfiguration 配置spring 数据库/事务相关信息
package com.czxy.webdemo.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.PropertySource;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.sql.DataSource;
@ComponentScan(basePackages="com.czxy.webdemo.service")
@PropertySource("classpath:db.properties")
@EnableTransactionManagement
public class SpringConfiguration {
/**
* 获得properties文件中内容，并注入对应变量
*/
@Value("${jdbc.driver}")
private String driver;
@Value("${jdbc.url}")
private String url;
@Value("${jdbc.username}")
private String username;
@Value("${jdbc.password}")
private String password;
/**
* 配置数据源
* @return
*/
@Bean
public DataSource dataSource(){
DruidDataSource druidDataSource = new DruidDataSource();
druidDataSource.setDriverClassName(driver);
druidDataSource.setUrl(url);
druidDataSource.setUsername(username);
druidDataSource.setPassword(password);
return druidDataSource;
}
/**
* 修复spring4.2bug
* @return
@Bean
public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer(){
return new PropertySourcesPlaceholderConfigurer();
}
*/
/**
* 事务管理器
* @param dataSource
* @return
*/
@Bean
public DataSourceTransactionManager txManager(DataSource dataSource){
return new DataSourceTransactionManager(dataSource);
}
}
4.配置类：Spring MVC
package com.czxy.webdemo.config;
import com.github.pagehelper.PageInterceptor;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.context.annotation.Bean;
import tk.mybatis.spring.mapper.MapperScannerConfigurer;
import javax.sql.DataSource;
import java.util.Properties;
public class MyBatisConfiguration {
/**
* 配置session工厂
* @param dataSource
* @return
* @throws Exception
*/
@Bean
public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception{
//1 创建 factoryBean
SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
//2 设置数据
// 2.1 数据源
factoryBean.setDataSource(dataSource);
// 2.2 驼峰命名
Configuration configuration = new Configuration();
configuration.setMapUnderscoreToCamelCase(true);
factoryBean.setConfiguration(configuration);
// 2.3 分页插件
Properties props = new Properties();
// 设置方言
props.setProperty("helperDialect", "mysql");
// 分页的同时进行count查询
props.setProperty("rowBoundsWithCount", "true");
// 分页合理化参数，pageNum<=0 时会查询第一页，pageNum>pages （超过总数时），会查询最后一页
props.setProperty("reasonable", "true");
PageInterceptor pageInterceptor = new PageInterceptor();
pageInterceptor.setProperties(props);
factoryBean.setPlugins(new Interceptor[] {pageInterceptor});
//3 通过factorybean获得对应
return factoryBean.getObject();
}
/**
* 映射扫描器
* @return
*/
@Bean
public MapperScannerConfigurer mapperScannerConfigurer(){
//1 创建
MapperScannerConfigurer mapperScanner = new MapperScannerConfigurer();
//2设置包
mapperScanner.setBasePackage("com.czxy.webdemo.mapper");
return mapperScanner;
}
}
5.配置类：初始化加载类
package com.czxy.webdemo.config;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.servlet.DispatcherServlet;
import javax.servlet.FilterRegistration;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
public class WebInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
//1 配置spring工厂
AnnotationConfigWebApplicationContext application = new AnnotationConfigWebApplicationContext();
// 注册所有的配置类
application.register(MyBatisConfiguration.class);
application.register(SpringConfiguration.class);
application.register(MvcConfiguration.class);
//2 post中文乱码
FilterRegistration.Dynamic encodingFilter = servletContext.addFilter("encoding", new CharacterEncodingFilter("UTF-8"));
encodingFilter.addMappingForUrlPatterns(null, true, "/*");
//3 核心控制器
ServletRegistration.Dynamic mvcServlet = servletContext.addServlet("springmvc", new DispatcherServlet(application));
//mvcServlet.addMapping("*.action");
mvcServlet.addMapping("/");
mvcServlet.setLoadOnStartup(2); //tomcat启动时，执行servlet的初始化方法
}
}
6.功能：查询所有
步骤一：编写Mapper
@org.apache.ibatis.annotations.Mapper
public interface StudentMapper extends Mapper {
}
步骤二：编写service
接口
public interface StudentService {
/**
* 查询所有
* @return
*/
List findAll();
}
实现类
@Service
@Transactional
public class StudentServiceImpl implements StudentService {
@Resource
private StudentMapper studentMapper;
@Override
public List findAll() {
return studentMapper.selectAll();
}
}
步骤三：编写controller
controller确定视图的名称
@Controller
@RequestMapping("/student")
public class StudentController {
@Resource
private StudentService studentService;
@GetMapping
public String findAll(Model model) {
//查询所有
List slist = studentService.findAll();
//存放到作用域
model.addAttribute("list", slist);
return "student_list";
}
}
编写jsp，显示查询结果
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
编号
姓名
年龄
操作
${vs.count}
${student.studentName}
${student.age}
修改
删除
步骤四：首页
web巩固案例
查询所有
步骤五：启动
浏览器:
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