【提供源码】ssm+maven+jsp 项目对数据库简单curd案例
文章目录
-
- 项目概要
- 项目条件
- 步骤：
-
- 1.在数据库创建表
- 2. 创建web项目
- 3.项目目录结构
- 4. 在pom.xml文件里添加依赖
- 5. 写其他配置文件
- 6. 分层写代码
- 7. jsp展示数据
- 8. 补充
- 9. 运行
- 10. 项目源码
项目概要
主要做对数据的增删改查操作
项目条件
框架：spring+springMVC+Mybatis
项目管理工具：Maven
代码编写工具：IntelliJ IDEA 2020.1 x64
数据库：MySQL
数据库工具：Navicat Premium
步骤：
1.在数据库创建表
创建表的 sql
CREATE TABLE `student` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(10) DEFAULT NULL,
`age` int(5) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
2. 创建web项目
选择新建项目，在Maven里选择web项目，填写项目名和包名
3.项目目录结构
首次建项目加载比较慢，需要稍等下
查看总项目结构如下：
4. 在pom.xml文件里添加依赖
在pom.xml文件里添加依赖
<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>com.tmm.testgroupId>
<artifactId>MyTestartifactId>
<version>1.0-SNAPSHOTversion>
<packaging>warpackaging>
<repositories>
<repository>
<id>aliid>
<url>http://maven.aliyun.com/nexus/content/groups/publicurl>
repository>
repositories>
<build>
<resources>
<resource>
<directory>src/main/javadirectory>
<includes>
<include>**/*.xmlinclude>
includes>
<filtering>falsefiltering>
resource>
resources>
build>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<maven.compiler.source>1.7maven.compiler.source>
<maven.compiler.target>1.7maven.compiler.target>
<spring.version>4.1.6.RELEASEspring.version>
<mybatis.version>3.3.1mybatis.version>
properties>
<dependencies>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>3.8.2version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-coreartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-oxmartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-txartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aopartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-context-supportartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.codehaus.jacksongroupId>
<artifactId>jackson-mapper-aslartifactId>
<version>1.9.13version>
dependency>
<dependency>
<groupId>commons-fileuploadgroupId>
<artifactId>commons-fileuploadartifactId>
<version>1.3.1version>
dependency>
<dependency>
<groupId>commons-iogroupId>
<artifactId>commons-ioartifactId>
<version>1.4version>
dependency>
<dependency>
<groupId>commons-codecgroupId>
<artifactId>commons-codecartifactId>
<version>1.3version>
dependency>
<dependency>
<groupId>com.github.sgroschupfgroupId>
<artifactId>zkclientartifactId>
<version>0.1version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-coreartifactId>
<version>2.5.1version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-annotationsartifactId>
<version>2.5.0version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>2.4.0version>
dependency>
<dependency>
<groupId>javaxgroupId>
<artifactId>javaee-apiartifactId>
<version>7.0version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>${mybatis.version}version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>1.3.1version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.8version>
dependency>
<dependency>
<groupId>commons-dbcpgroupId>
<artifactId>commons-dbcpartifactId>
<version>1.2.2version>
dependency>
<dependency>
<groupId>jstlgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>taglibsgroupId>
<artifactId>standardartifactId>
<version>1.1.2version>
dependency>
dependencies>
project>
5. 写其他配置文件
① 首先在 mian 目录下，右键新建 resources 文件夹，确保是资源文件
② 在 resources 文件夹里新建两个xml文件（spring.xml，spring-mvc.xml），和一个配置文件（jdbc.properties）
③ 配置四个xml文件 jdbc.properties，spring.xml，spring-mvc.xml，web.xml
代码：
jdbc.properties
driver=com.mysql.jdbc.Driver
url=jdbc\:mysql\:///test?useUnicode=xxx&characterEncoding=UTF-8 #自己的数据库名称
username=root
password=xxx #自己的数据库密码
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000
spring.xml
<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/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<context:annotation-config />
<context:component-scan base-package="com.tmm.test">context:component-scan>
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties"/>
bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<property name="initialSize" value="${initialSize}">property>
<property name="maxActive" value="${maxActive}">property>
<property name="maxIdle" value="${maxIdle}">property>
<property name="minIdle" value="${minIdle}">property>
<property name="maxWait" value="${maxWait}">property>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.tmm.test.mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
bean>
beans>
spring-mvc.xml
<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-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<context:component-scan base-package="com.tmm.test.controller"/>
<mvc:default-servlet-handler />
<mvc:annotation-driven >
<mvc:message-converters register-defaults="true">
<bean class="org.springframework.http.converter.StringHttpMessageConverter" >
<list>
<value>application/json;charset=utf-8value>
<value>text/html;charset=utf-8value>
<value>application/x-www-form-urlencodedvalue>
list>
property>
bean>
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" >bean>
mvc:message-converters>
mvc:annotation-driven>
<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8value>
list>
property>
bean>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter"/>
list>
property>
bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="suffix" value=".jsp"/>
<property name="prefix" value="/"/>
bean>
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="utf-8"/>
<property name="maxUploadSize" value="10485760000"/>
<property name="maxInMemorySize" value="40960"/>
bean>
beans>
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_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Archetype Created Web Applicationdisplay-name>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring.xmlparam-value>
context-param>
<filter>
<filter-name>encodingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>UTF-8param-value>
init-param>
filter>
<filter-mapping>
<filter-name>encodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
<listener>
<listener-class>org.springframework.web.util.IntrospectorCleanupListenerlistener-class>
listener>
<servlet>
<servlet-name>SpringMVCservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring-mvc.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
<async-supported>trueasync-supported>
servlet>
<servlet-mapping>
<servlet-name>SpringMVCservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
<welcome-file-list>
<welcome-file>index.jspwelcome-file>
welcome-file-list>
web-app>
6. 分层写代码
在mian下新建包com.tmm.test，在此包下分别新建四个包：
① 新建 entity 包，entity包下再新建实体类 Student
在实体类里将 无参构造函数，有参构造函数，setget方法，toString方法自动生成出来
package com.tmm.test.entity;
import java.io.Serializable;
public class Student implements Serializable {
private Integer id;
private String name;
private Integer age;
//无参构造函数
public Student() {
}
//有参构造函数
public Student(Integer id, String name, Integer age) {
this.id = id;
this.name = name;
this.age = age;
}
//toString方法
@Override
public String toString() {
return "Student{" +
"id=" + id +
", name='" + name + '\'' +
", age=" + age +
'}';
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
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;
}
}
② 新建 mapper包，mapper包下新建 StudentMapper类
StudentMapper是一接口，用来写增删改查的方法
package com.tmm.test.mapper;
import com.tmm.test.entity.Student;
import java.util.List;
public interface StudentMapper {
//查询所有数据
List<Student> selectAll();
//根据id删除
int delete(int id);
//根据id修改
int update(Student student);
//添加
int insert(Student student);
//通过id查找
Student findById(int id);
}
③ 在mapper包下新建xml文件 StudentMapper.xml
StudentMapper.xml 是mybatis的映射文件。
<mapper namespace="com.tmm.test.mapper.StudentMapper">
<resultMap id="BaseResultMap" type="com.tmm.test.entity.Student">
<result column="id" jdbcType="INTEGER" property="id" />
<result column="name" jdbcType="VARCHAR" property="name" />
<result column="age" jdbcType="INTEGER" property="age" />
resultMap>
<parameterMap type="com.tmm.test.entity.Student" id="StudentMap">
<parameter property="name" resultMap="BaseResultMap"/>
<parameter property="age" resultMap="BaseResultMap"/>
parameterMap>
<sql id="Base_Column_List">
id,name,age
sql>
<select id="selectAll" resultMap="BaseResultMap">
select
<include refid="Base_Column_List" />
from student
select>
<select id="findById" resultType="com.tmm.test.entity.Student">
select
<include refid="Base_Column_List" />
from student where id =#{id}
select>
<delete id="delete" parameterType="int">
delete from student where id =#{id}
delete>
<update id="update" parameterMap="StudentMap">
update student set name=#{name},age=#{age} where id=#{id}
update>
<insert id="insert" parameterMap="StudentMap">
insert into student(name,age) values(#{name},#{age})
insert>
mapper>
④ 新建 service，在 service包下新建StudentService类
StudentService是一接口
package com.tmm.test.service;
import com.tmm.test.entity.Student;
import java.util.List;
public interface StudentService {
//查询所有数据
public List<Student> selectAll();
//根据id删除
public int delete(int id);
//根据id修改
public int update(Student student);
//添加
public int insert(Student student);
//通过id查找
public Student findById(int id);
}
⑤ 在 service包下，新建 impl包，包里新建 StudentServiceIml
StudentServiceIml 是StudentService类的实现类
package com.tmm.test.service.impl;
import com.tmm.test.entity.Student;
import com.tmm.test.mapper.StudentMapper;
import com.tmm.test.service.StudentService;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.List;
@Service("studentService")
public class StudentServiceIml implements StudentService {
@Resource
private StudentMapper studentMapper;
@Override
public List<Student> selectAll() {
return studentMapper.selectAll();
}
@Override
public int delete(int id) {
return studentMapper.delete(id);
}
@Override
public int update(Student student) {
return studentMapper.update(student);
}
@Override
public int insert(Student student) {
return studentMapper.insert(student);
}
@Override
public Student findById(int id) {
return studentMapper.findById(id);
}
}
⑥ 新建 controller包，包里新建 StudentController类
package com.tmm.test.controller;
import com.tmm.test.entity.Student;
import com.tmm.test.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
import java.util.List;
@Controller
@RequestMapping("/student")
public class StudentController {
@Autowired
private StudentService studentService;
/**
* 查询
* @param model
* @return
*/
@RequestMapping("/select")
public String list(Model model){
List<Student> student=studentService.selectAll();
model.addAttribute("student", student);
return "/show";
}
/**
* 根据id删除
* @param id
* @return
*/
@RequestMapping("/delete/{id}")
public String delete(@PathVariable int id){
//@PathVariable 映射 URL 绑定的占位符
int count = studentService.delete(id);
System.out.println("count："+count);
return "redirect:/student/select";
}
/**
* 新增
* @param student
* @return
*/
@RequestMapping("/insert")
public String insert(Student student){
studentService.insert(student);
return "redirect:/student/select";
}
/**
* 跳转修改页面，需要先通过id查找到此条数据
* @param model
* @param id
* @return
*/
@RequestMapping("/toUpdate/{id}")
public String findById(Model model, @PathVariable int id){
Student student = studentService.findById(id);
model.addAttribute("s",student);//通过id查找到此条数据
return "/update"; //update.jsp页面
}
/**
* 修改
* @param student
* @return
*/
@RequestMapping("/update")
public String update(Student student){
studentService.update(student);
return "redirect:/student/select";
}
}
7. jsp展示数据
main目录下，新建 webapp文件夹，webapp下，新建四个jsp页面
① index.jsp — 主页面
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false"%>
<html>
<head>
<title>查看表格title>
head>
<body>
<div style="margin:0 auto;width:250px;height:50px;">
<button onclick="window.open('${pageContext.request.contextPath }/student/select');">查看表格button>
div>
body>
html>
② show.jsp —数据展示页面
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<body>
<div align=center>
<table border=1 cellpadding=0 cellspacing=0 style='height:40px;width:250px;margin-bottom: 20px;'>
<tr>
<th>姓名th>
<th>年纪th>
<th>操作th>
tr>
<c:forEach items="${student}" var="student">
<tr style="text-align:center">
<td>${student.name}td>
<td>${student.age}td>
<td>
<a href="${pageContext.request.contextPath }/student/delete/${student.id}">删除a>
<a href="${pageContext.request.contextPath }/student/toUpdate/${student.id}">修改a>
td>
tr>
c:forEach>
table>
<button onclick="window.open('${pageContext.request.contextPath }/add.jsp');">新增button>
div>
body>
html>
③ add.jsp — 新增页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>新建数据title>
head>
<body>
<form action="student/insert" method="post">
姓名：<input type="text" name="name"/><br/>
年龄：<input type="text" name="age"/><br/>
<input type="submit"/>
form>
body>
html>
④ update.jsp —修改页面
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false"%>
<%--isELIgnored="false" 表示使用el表达式--%>
<html>
<head>
<title>数据修改title>
head>
<body>
<div>
<form action="${pageContext.request.contextPath }/student/update" method="post">
<input type="hidden" name="id" value="${s.id}">
姓名：<input type="text" name="name" value="${s.name}"/><br/>
年龄：<input type="text" name="age" value="${s.age}"/><br/>
<input type="submit" value="提交">
form>
div>
body>
html>
8. 补充
注意：
若要修改整个项目的包名，以下几个地方是需要修改的
① jdbc.properties文件里的配置修改成自己数据库的
包括数据库名和密码
② spring.xml文件里的配置
下面两个地方包名修改成自己项目的
<context:component-scan base-package="com.tmm.test"></context:component-scan>
<property name="basePackage" value="com.tmm.test.mapper"/>
③ spring-mvc.xml文件里的配置
包名修改成自己的
<context:component-scan base-package="com.tmm.test.controller"/>
④ StudentMapper.xml文件里的配置
下面两个地方包名修改成自己项目的
<mapper namespace="com.tmm.test.mapper.StudentMapper"> <!--这个是mapper文件-->
<resultMap id="BaseResultMap" type="com.tmm.test.entity.Student"> <!--这个是实体文件-->
9. 运行
配置Tomcat服务器，按图操作
同一页面，继续操作
配置war包
点击右上角的绿色箭头按钮，就会跳到之前配置的浏览器页面。
10. 项目源码
GitHub地址：点击这里
码云地址：点击这里
完毕~