JAVA中SSM框架的搭建实现CRUD的方法
时间:2019-04-10
本文章向大家介绍JAVA中SSM框架的搭建实现CRUD的方法，主要包括JAVA中SSM框架的搭建实现CRUD的方法使用实例、应用技巧、基本知识点总结和需要注意事项，具有一定的参考价值，需要的朋友可以参考一下。
最近在开发公司的一个系统，系统的框架是用ssm的框架搭建的，当然和这次写博客的不一样，它拥有很多的配置文件，企业级的开发所需要的配置文件是非常繁琐的，今天记录一下一个简单的SSM框架的搭建和实现一个CRUD的操作。
使用的是Maven插件来配置我们需要的jar包，由于操作不多，所以并没有配置很多，要注意自己使用的jdk的版本，选择不同版本号的jdk
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.lr</groupId>
<artifactId>ssm</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>ssm Maven Webapp</name>
<url>http://maven.apache.org</url>
<!-- 用来设置版本号 -->
<properties>
<srping.version>4.0.2.RELEASE</srping.version>
<mybatis.version>3.2.8</mybatis.version>
<slf4j.version>1.7.12</slf4j.version>
<log4j.version>1.2.17</log4j.version>
</properties>
<!-- 用到的jar包 -->
<dependencies>
<!-- 单元测试 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<!-- 表示开发的时候引入，发布的时候不会加载此包 -->
<scope>test</scope>
</dependency>
<!-- java ee包 -->
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.8.8</version>
</dependency>
<!-- spring框架包 start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${srping.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${srping.version}</version>
</dependency>
<!-- spring框架包 end -->
<!-- mybatis框架包 start -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency>
<!-- mybatis框架包 end -->
<!-- 数据库驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
<!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<!-- jstl标签类 -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<!-- log start -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- log END -->
<!-- Json -->
<!-- 格式化对象，方便输出日志 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.6</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
<!-- 上传组件包 start -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.10</version>
</dependency>
<!-- 上传组件包 end -->
<!-- AL相关添加 -->
<dependency>
<groupId>net.sourceforge.jexcelapi</groupId>
<artifactId>jxl</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.8</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.9</version>
</dependency>
<!-- AL相关添加 -->
</dependencies>
<build>
<finalName>Maven_Project</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
然后配置数据库的连接，改成自己的数据库就行了
driver=com.mysql.jdbc.Driver url=jdbc\:mysql\://locahost\:3306/db username=root password=root maxActive=20 maxIdle=20 minIdle=1 maxWait=60000
配置文件spring-dao.xml，Spring会自动查找其下的类
<?xml version="1.0" encoding="UTF-8"?>
<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">
<!-- DAO接口所在包名，Spring会自动查找其下的类 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--basePackage指定要扫描的包，在此包之下的映射器都会被搜索到。
可指定多个包，包与包之间用逗号或分号分隔-->
<property name="basePackage" value="com.lr.dao" />
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>
</beans>
配置文件Spring和Mybatis的整合文件
<?xml version="1.0" encoding="UTF-8"?>
<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">
<!-- 引入配置文件 -->
<context:property-placeholder location="classpath:/jdbc.properties" />
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/db?useUnicode=true&characterEncoding=utf8" />
<property name="username" value="root" />
<property name="password" value="root" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="3" />
<!-- 连接池最大数量 -->
<property name="maxActive" value="20" />
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="20" />
<!-- 连接池最小空闲 -->
<property name="minIdle" value="1" />
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="60000" />
</bean>
<!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:com/lr/mapper/*.xml"></property>
</bean>
</beans>
配置事物的文件
<?xml version="1.0" encoding="UTF-8"?>
<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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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/aop
http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">
<!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 配置参与事务的类 -->
<aop:config>
<aop:pointcut id="allServiceMethod" expression="execution(* com.lr.service.*.*(..))"/>
<aop:advisor pointcut-ref="allServiceMethod" advice-ref="txAdvice" />
</aop:config>
<!-- 使用声明方式配置事务 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*" propagation="REQUIRED" rollback-for="java.lang.Exception"/>
</tx:attributes>
</tx:advice>
</beans>
配置Springmvc.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<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">
<!-- 自动扫描 -->
<context:component-scan base-package="com.lr.controller" />
<mvc:annotation-driven />
<mvc:default-servlet-handler/>
<!-- 定义跳转的文件的前后缀 ，视图模式配置-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
好了！！！需要配置的文件已经配置完成了，足够我们进行一波操作了
接下来是后台的一些代码，这里主要是实体类，dao层，service层，controller层，我把后台的文件一起上传了，mapper.xml文件是实现方法最关键的地方
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.lr.dao.IUserDao">
<resultMap id="BaseResultMap" type="com.lr.dto.User">
<result column="id" property="id" jdbcType="INTEGER" />
<result column="name" property="name" jdbcType="VARCHAR" />
<result column="password" property="password" jdbcType="VARCHAR" />
<result column="age" property="age" jdbcType="INTEGER" />
</resultMap>
<sql id="Base_Column_List">
id, name, password, age
</sql>
<!-- 增加用户 -->
<insert id="addUser" parameterType="com.lr.dto.User">
insert into user(name,password,age) values(#{name},#{password},#{age})
</insert>
<!-- 查询用户-->
<select id="queryByPrimaryKey" resultMap="BaseResultMap"
parameterType="java.lang.Integer">
select
<include refid="Base_Column_List" />
from user
where id = #{id}
</select>
<!-- 删除用户 -->
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
delete from user
where id = #{id}
</delete>
<!-- 更新用户 -->
<update id="updateByPrimaryKey" parameterType="com.lr.dto.User" >
update user set name=#{name},password=#{password},age=#{age} where id=#{id}
</update>
<select id="findallUser" resultType="com.lr.dto.User">
select * from user
</select>
</mapper>
package com.lr.dao;
import java.util.List;
import com.lr.dto.User;
public interface IUserDao {
//查询用户
public User queryByPrimaryKey(int id);
//删除用户
public int deleteByPrimaryKey(int id);
//更新用户
public int updateByPrimaryKey(User user);
//添加用户
public int addUser(User user);
//查询所有用户
public List<User> findallUser();
}
package com.lr.service;
import java.util.List;
import com.lr.dto.User;
public interface IUserService {
//查询用户
public User getUserById(int userId);
//删除
public void deleteUser(int id);
//更新用户
public void updateUser(User user);
//添加用户
public void addUser(User user);
//查看所有用户
public List<User> findallUser();
}
package com.lr.service.Impl;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.lr.dao.IUserDao;
import com.lr.dto.User;
import com.lr.service.IUserService;
@Service("userService")
public class UserServiceImpl implements IUserService{
@Resource
private IUserDao userdao;
public IUserDao getUserdao() {
return userdao;
}
public void setUserdao(IUserDao userdao) {
this.userdao = userdao;
}
//查询用户
@Override
public User getUserById(int userId) {
return userdao.queryByPrimaryKey(userId);
}
//更新用户
@Override
public void updateUser(User user) {
userdao.updateByPrimaryKey(user);
}
//删除用户
@Override
public void deleteUser(int id) {
userdao.deleteByPrimaryKey(id);
}
//添加用户
@Override
public void addUser(User user) {
userdao.addUser(user);
}
//查询所有用户
@Override
public List<User> findallUser() {
return userdao.findallUser();
}
}
package com.lr.controller;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.lr.dto.User;
import com.lr.service.IUserService;
@Controller
public class UserController {
@Autowired
private IUserService userService;
public IUserService getUserService() {
return userService;
}
public void setUserService(IUserService userService) {
this.userService = userService;
}
//主页面
@RequestMapping("/")
public String userMgr() {
return "showUser";
}
//添加用户
@RequestMapping("/addUser")
@ResponseBody
public void userAdd(User user) {
userService.addUser(user);
}
//删除用户
@RequestMapping("/deleteUser")
@ResponseBody
public void deleteUser(int id){
userService.deleteUser(id);
}
//修改用户
@RequestMapping("/updateUser")
@ResponseBody
public void upadteUser(User user){
userService.updateUser(user);
}
//根据id查找用户
@RequestMapping("/showUser")
@ResponseBody
public User showUser(int id,Model model){
return userService.getUserById(id);
}
//查询所有用户
@RequestMapping("/findallUser")
@ResponseBody
public List<User> findallUser(){
return userService.findallUser();
}
}
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8"><script type="text/javascript" src="<%= application.getContextPath() %>/js/jquery-1.12.4.min.js"></script>
<script type="text/javascript">
//添加用户
$(function(){
$("#add").on("click", addNewUser);
})
function addNewUser(){
var name = $.trim($("#txtName").val());
var password = $.trim($("#txtPassword").val());
var age = $.trim($("#txtAge").val());
$.post("/ssm/addUser", {"name": name, "password": password, "age": age}, function(){
alert("添加成功！")
});
}
//删除用户
$(function(){
$("#delete").on("click",deleteUser);
})
function deleteUser(){
var id=$.trim($("#deleteid").val());
$.get("/ssm/deleteUser",{"id":id},function(){
alert("删除成功！")
});
}
//查询所有用户
$(function(){
$("#findalluser").click(function(){
$.ajax({
type:"POST",
dataType:"json",
url:"/ssm/findallUser",
success:function(msg){
var str="";
for(i in msg){
str+="<tr><th>"+msg[i].id+"</th><th>"+msg[i].name+"</th><th>"
+msg[i].password+"</th><th>"+msg[i].age+"</th><tr>"
}
$("#findall").append(str);
}
});
});
});
//根据id查找一个用户
$(function(){
$("#find").click(function(){
$.ajax({
type:"POST",
data:{id:$("#findid").val()},
dataType:"json",
url:"/ssm/showUser",
success:function(user){
var str="";
str+="<tr><th>"+user.id+"</th><th>"+user.name+"</th><th>"
+user.password+"</th><th>"+user.age+"</th><tr>"
$("#finduserbyid").append(str);
}
})
})
})
//根据id修改用户信息
$(function(){
$("#update").on("click",updateUser);
})
function updateUser(){
alert($.trim($("#updateid").val()))
alert($.trim($("#updatename").val()))
alert($.trim($("#updatepassword").val()))
alert($.trim($("#updateage").val()))
var id=$.trim($("#updateid").val());
var name=$.trim($("#updatename").val());
var password=$.trim($("#updatepassword").val());
var age=$.trim($("#updateage").val());
$.post("/ssm/updateUser",{"id":id,"name":name,"password":password,"age":age},function(){
alert("修改成功！")
});
}
</script>
<title>用户管理</title>
</head>
<body>
<div>
<p>姓名：<input type="text" id="txtName"></p>
<p>密码：<input type="password" id="txtPassword"></p>
<p>年龄：<input type="text" id="txtAge"></p>
<p><button id="add">添加</button></p>
</div>
<hr style="height:1px;border:none;border-top:1px dashed #0066CC;" />
<div>
<p>输入用户id:<input type="text" id="deleteid"></p>
<p><button id="delete">删除</button></p>
</div>
<hr style="height:1px;border:none;border-top:1px dashed #0066CC;" />
<div><p><button id="findalluser">查询所有</button></p></div>
<div>
<table width="300" border="1" >
<thead id="findall">
<tr>
<th width="50">id</th>
<th width="50">姓名</th>
<th width="50">密码</th>
<th width="50">年龄</th>
</tr>
</thead>
</table>
</div>
<hr style="height:1px;border:none;border-top:1px dashed #0066CC;" />
<div>
<p>输入用户id:<input type="text" id="findid"></p>
<p><button id="find">查询</button></p>
</div>
<div>
<table width="300" border="1" >
<thead id="finduserbyid">
<tr>
<th width="50">id</th>
<th width="50">姓名</th>
<th width="50">密码</th>
<th width="50">年龄</th>
</tr>
</thead>
</table>
</div>
<hr style="height:1px;border:none;border-top:1px dashed #0066CC;" />
<div>
<p>输入用户id:<input type="text" id="updateid"></p>
<p>输入用户姓名:<input type="text" id="updatename"></p>
<p>输入密码：<input type="password" id="updatepassword"></p>
<p>输入用户年龄:<input type="password" id="updateage"></p>
<p><button id="update">修改</button></p>
</div>
</body>
</html>
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