目录
一、Springmvc之CRUD
之前crud:自定义mvc结构
1.导入jar包
2.框架配置文件 mvc.xml
3.web.xml配置
dispatherServlet
encodingFilter
4.导入工具类：pageBean，tag助手类，tld文件
5.做开发
model,dao,service,web,mvc.xml，前端
现在Springmvc
1.导入pom包
pom文件这玩意坑死人~请谨慎编写，共五步
步骤1： <properties>
2. <dependency>
3.一步步来，慢慢导入改变
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency><!-- jsp依赖-->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency><dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
4. <plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven.compiler.plugin.version}</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<dependencies>
<!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
</dependencies>
<configuration>
<overwrite>true</overwrite>
</configuration>
</plugin>
<plugin>
5. <plugin>插件2
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<?xml version="1.0" encoding="UTF-8"?>
<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>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>ssm3</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>
<!--添加jar包依赖-->
<!--1.spring 5.0.2.RELEASE相关-->
<spring.version>5.0.2.RELEASE</spring.version>
<!--2.mybatis相关-->
<mybatis.version>3.4.5</mybatis.version>
<!--mysql-->
<mysql.version>5.1.44</mysql.version>
<!--pagehelper分页jar依赖-->
<pagehelper.version>5.1.2</pagehelper.version>
<!--mybatis与spring集成jar依赖-->
<mybatis.spring.version>1.3.1</mybatis.spring.version>
<!--3.dbcp2连接池相关 druid-->
<commons.dbcp2.version>2.1.1</commons.dbcp2.version>
<commons.pool2.version>2.4.3</commons.pool2.version>
<!--4.log日志相关-->
<log4j2.version>2.9.1</log4j2.version>
<!--5.其他-->
<junit.version>4.12</junit.version>
<servlet.version>4.0.0</servlet.version>
<lombok.version>1.18.2</lombok.version>
</properties>
<dependencies>
<!--1.spring相关-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--2.mybatis相关-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!--pagehelper分页插件jar包依赖-->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>${pagehelper.version}</version>
</dependency>
<!--mybatis与spring集成jar包依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!--3.dbcp2连接池相关-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>${commons.dbcp2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>${commons.pool2.version}</version>
</dependency>
<!--4.log日志相关依赖-->
<!--核心log4j2jar包-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--web工程需要包含log4j-web，非web工程不需要-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--5.其他-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- jsp依赖-->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
</dependencies>
<build>
<finalName>ssm2</finalName>
<resources>
<!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
<!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
<resource>
<directory>src/main/resources</directory>
<includes>
<include>jdbc.properties</include>
<include>*.xml</include>
</includes>
</resource>
</resources>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven.compiler.plugin.version}</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<dependencies>
<!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
</dependencies>
<configuration>
<overwrite>true</overwrite>
</configuration>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>2.框架配置文件 mvc.xml
applicationContext.xml
applicationContext-mybatis.xml
jdbc.properties
generate.xnl
log4j2.xml
springmvc-servlet.xml
3.web.xml配置
dispatherServlet
contextloadlister
encoding
4.导入工具类：pageBean，tag助手类，tld文件
5.做开发
model,dao,service,web,mvc.xml，前端
<?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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 通过context:component-scan元素扫描指定包下的控制器-->
<!--1) 扫描com.javaxl.zf及子子孙孙包下的控制器(扫描范围过大，耗时)-->
<aop:aspectj-autoproxy/>
<context:component-scan base-package="com.zking.oa"/>
<!--2) 此标签默认注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter -->
<!--两个bean，这两个bean是spring MVC为@Controllers分发请求所必须的。并提供了数据绑定支持，-->
<!--@NumberFormatannotation支持，@DateTimeFormat支持，@Valid支持，读写XML的支持（JAXB），读写JSON的支持（Jackson）-->
<mvc:annotation-driven></mvc:annotation-driven>
<!--3) ViewResolver -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- viewClass需要在pom中引入两个包：standard.jar and jstl.jar -->
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--4) 单独处理图片、样式、js等资源 -->
<!--<mvc:resources location="/css/" mapping="/css/**"/>-->
<!--
<mvc:resources location="/static/" mapping="/static/**"/>
-->
<!--<mvc:resources location="/js/" mapping="/js/**"/>-->
<!-- <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">-->
<!-- <!– 必须和用户JSP 的pageEncoding属性一致，以便正确解析表单的内容 –>-->
<!-- <property name="defaultEncoding" value="UTF-8"></property>-->
<!-- <!– 文件最大大小(字节) 1024*1024*50=50M–>-->
<!-- <property name="maxUploadSize" value="52428800"></property>-->
<!-- <!–resolveLazily属性启用是为了推迟文件解析，以便捕获文件大小异常–>-->
<!-- <property name="resolveLazily" value="true"/>-->
<!-- </bean>-->
</beans>
package com.zking.oa.biz;
import com.zking.oa.model.Clazz;
import com.zking.oa.util.PageBean;
import java.util.List;
/**
* @author 锦鲤
* @site www.lucy.com
* @company xxx公司
* @create 2022-08-18 13:08
*/
public interface ClazzBiz {
int deleteByPrimaryKey(Integer cid);
int insert(Clazz record);
int insertSelective(Clazz record);
Clazz selectByPrimaryKey(Integer cid);
int updateByPrimaryKeySelective(Clazz record);
int updateByPrimaryKey(Clazz record);
List<Clazz> listPager (Clazz clazz, PageBean pagebean);
}
<?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.zking.oa.mapper.ClazzMapper" >
<resultMap id="BaseResultMap" type="com.zking.oa.model.Clazz" >
<constructor >
<idArg column="cid" jdbcType="INTEGER" javaType="java.lang.Integer" />
<arg column="cname" jdbcType="VARCHAR" javaType="java.lang.String" />
<arg column="cteacher" jdbcType="VARCHAR" javaType="java.lang.String" />
<arg column="pic" jdbcType="VARCHAR" javaType="java.lang.String" />
</constructor>
</resultMap>
<sql id="Base_Column_List" >
cid, cname, cteacher, pic
</sql>
<select id="listPager" resultType="com.zking.oa.model.Clazz" parameterType="com.zking.oa.model.Clazz" >
select
<include refid="Base_Column_List" />
from t_struts_class
<where>
<if test="cname !=null and cname != '' ">
and cname like CONCAT('%', #{cname},'%')
</if>
<if test="cid !=null and cid != ''">
and cid =#{cid}
</if>
</where>
</select>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from t_struts_class
where cid = #{cid,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from t_struts_class
where cid = #{cid,jdbcType=INTEGER}
</delete>
<insert id="insert" parameterType="com.zking.oa.model.Clazz" >
insert into t_struts_class (cid, cname, cteacher,
pic)
values (#{cid,jdbcType=INTEGER}, #{cname,jdbcType=VARCHAR}, #{cteacher,jdbcType=VARCHAR},
#{pic,jdbcType=VARCHAR})
</insert>
<insert id="insertSelective" parameterType="com.zking.oa.model.Clazz" >
insert into t_struts_class
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="cid != null" >
cid,
</if>
<if test="cname != null" >
cname,
</if>
<if test="cteacher != null" >
cteacher,
</if>
<if test="pic != null" >
pic,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="cid != null" >
#{cid,jdbcType=INTEGER},
</if>
<if test="cname != null" >
#{cname,jdbcType=VARCHAR},
</if>
<if test="cteacher != null" >
#{cteacher,jdbcType=VARCHAR},
</if>
<if test="pic != null" >
#{pic,jdbcType=VARCHAR},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="com.zking.oa.model.Clazz" >
update t_struts_class
<set >
<if test="cname != null" >
cname = #{cname,jdbcType=VARCHAR},
</if>
<if test="cteacher != null" >
cteacher = #{cteacher,jdbcType=VARCHAR},
</if>
<if test="pic != null" >
pic = #{pic,jdbcType=VARCHAR},
</if>
</set>
where cid = #{cid,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="com.zking.oa.model.Clazz" >
update t_struts_class
set cname = #{cname,jdbcType=VARCHAR},
cteacher = #{cteacher,jdbcType=VARCHAR},
pic = #{pic,jdbcType=VARCHAR}
where cid = #{cid,jdbcType=INTEGER}
</update>
</mapper>配置服务器tomcat
package com.zking.oa.controller;
import com.zking.oa.biz.ClazzBiz;
import com.zking.oa.model.Clazz;
import com.zking.oa.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
import java.util.List;
/**
* @author 锦鲤
* @site www.lucy.com
* @company xxx公司
* @create 2022-08-18 13:42
*/
@Controller
@RequestMapping("/clz")
public class ClazzController {
@Autowired
private ClazzBiz clazzBiz;
//list-->clzList
// toList--重定向list--"redirect:/clz/list"
//toEdit--重定向到编辑界面--> clzedit
//Clazz:以前是通过模型驱动接口封装，现在是直接在方法中传参
@RequestMapping("/list")
public String list(Clazz clazz, HttpServletRequest request){
PageBean pagebean=new PageBean();
pagebean.setRequest(request);
List<Clazz> lst=this.clazzBiz.listPager(clazz,pagebean);
request.setAttribute("lst",lst);
request.setAttribute("pagebean",pagebean);
return "clzList";
}
@RequestMapping("/toEdit")
public String toedit(Clazz clazz, HttpServletRequest request){
Integer cid=clazz.getCid();
//传送的id修改，没有传代表新增
if(cid!=null){
List<Clazz> lst = this.clazzBiz.listPager(clazz,null);
request.setAttribute("c" ,lst.get(0));
}
return "clzEdit";
}
@RequestMapping("/add")
public String add(Clazz clazz){
this.clazzBiz.insertSelective(clazz);
return "redirect:/clz/list";
}
@RequestMapping("/edit")
public String edit(Clazz clazz){
this.clazzBiz.updateByPrimaryKeySelective(clazz);
return "redirect:/clz/list";
}
@RequestMapping("/del")
public String del(Clazz clazz){
this.clazzBiz.deleteByPrimaryKey(clazz.getCid());
return "redirect:/clz/list";
}
}
主界面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://jsp.veryedu.cn" prefix="z" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link
href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.css"
rel="stylesheet">
<script
src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.js"></script>
<title>博客列表</title>
<style type="text/css">
.page-item input {
padding: 0;
width: 40px;
height: 100%;
text-align: center;
margin: 0 6px;
}
.page-item input, .page-item b {
line-height: 38px;
float: left;
font-weight: 400;
}
.page-item.go-input {
margin: 0 10px;
}
</style>
</head>
<body>
<form class="form-inline"
action="${pageContext.request.contextPath }/clz/list" method="post">
<div class="form-group mb-2">
<input type="text" class="form-control-plaintext" name="cname"
placeholder="请输入班级名称">
</div>
<button type="submit" class="btn btn-primary mb-2">查询</button>
<a class="btn btn-primary mb-2" href="${pageContext.request.contextPath }/clz/toEdit">新增</a>
</form>
<table class="table table-striped bg-success">
<thead>
<tr>
<th scope="col">ID</th>
<th scope="col">班级名称</th>
<th scope="col">老师</th>
<th scope="col">头像</th>
<th scope="col">操作</th>
</tr>
</thead>
<tbody>
<c:forEach var="b" items="${lst }">
<tr>
<td>${b.cid }</td>
<td>${b.cname }</td>
<td>${b.cteacher }</td>
<td>${b.pic }</td>
<td>
<img src="${pageContext.request.contextPath}${b.pic}" style="width: 100px;height: 100px;">
</td>
<td>
<a href="${pageContext.request.contextPath }/clz/toEdit?cid=${b.cid}">修改</a>
<a href="${pageContext.request.contextPath }/clzUpload.jsp?cid=${b.cid}">上传图片</a>
<c:if test="${not empty b.pic}">
<a href="${pageContext.request.contextPath }/clz/download?cid=${b.cid}">下载图片</a>
</c:if>
<a href="${pageContext.request.contextPath }/clz/del?cid=${b.cid}">删除</a>
</td>
</tr>
</c:forEach>
</tbody>
</table>
<!-- 这一行代码就相当于前面分页需求前端的几十行了 -->
<z:page pageBean="${pageBean }"></z:page>
<%--${pageBean }--%>
</body>
</html>修改界面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>班级的编辑界面</title>
</head>
<body>
<form action="${pageContext.request.contextPath }/clz/${empty b ? 'add' : 'edit'}" method="post">
id:<input type="text" name="cid" value="${b.cid }"><br>
cname:<input type="text" name="cname" value="${b.cname }"><br>
cteacher:<input type="text" name="cteacher" value="${b.cteacher }"><br>
<input type="submit">
</form>
</body>
</html>效果图：
修改功能
二、图片上传
图片上传步骤：
1.springmvc.xml添加多功能的解析器配置
2.前台页面添加多功能表单设置mulipart/form-data
3后台利用mulipartfile类进行文件接收
注意：
表单里的multipart/form-data要和multipartFile属性一致4在IDEA中完成图片请求地址与硬盘中地址的映射关系
vo:view object
dto:接收参数，参数不仅仅存在于实体类modle里
导入pom依赖
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
<?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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 通过context:component-scan元素扫描指定包下的控制器-->
<!--1) 扫描com.javaxl.zf及子子孙孙包下的控制器(扫描范围过大，耗时)-->
<aop:aspectj-autoproxy/>
<context:component-scan base-package="com.zking.oa"/>
<!--2) 此标签默认注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter -->
<!--两个bean，这两个bean是spring MVC为@Controllers分发请求所必须的。并提供了数据绑定支持，-->
<!--@NumberFormatannotation支持，@DateTimeFormat支持，@Valid支持，读写XML的支持（JAXB），读写JSON的支持（Jackson）-->
<mvc:annotation-driven></mvc:annotation-driven>
<!--3) ViewResolver -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- viewClass需要在pom中引入两个包：standard.jar and jstl.jar -->
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--4) 单独处理图片、样式、js等资源 -->
<!-- <mvc:resources location="/css/" mapping="/css/**"/>-->
<!-- <mvc:resources location="/static/" mapping="/static/**"/>-->
<!-- <mvc:resources location="/js/" mapping="/js/**"/>-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 必须和用户JSP 的pageEncoding属性一致，以便正确解析表单的内容 -->
<property name="defaultEncoding" value="UTF-8"></property>
<!-- 文件最大大小(字节) 1024*1024*50=50M-->
<property name="maxUploadSize" value="52428800"></property>
<!--resolveLazily属性启用是为了推迟文件解析，以便捕获文件大小异常-->
<property name="resolveLazily" value="true"/>
</bean>
</beans>
ClazzDto工具
package com.zking.oa.model.dto;
import com.zking.oa.model.Clazz;
import org.springframework.web.multipart.MultipartFile;
/**
* @author 锦鲤
* @site www.lucy.com
* @company xxx公司
* @create 2022-08-18 14:39
*/
public class ClazzDto extends Clazz {
private MultipartFile picFile;
public MultipartFile getPicFile() {
return picFile;
}
public void setPicFile(MultipartFile picFile) {
this.picFile = picFile;
}
}
图片映射
映射完成apply
controlle类
//文件上传
@RequestMapping("/upload")
public String upload(ClazzDto clazzdto){
try {
//前台上传
MultipartFile picFile =clazzdto.getPicFile();
InputStream inputstream = picFile.getInputStream();
// FileOutputStream fout = new FileOutputStream(new File("d/temp/1.png"));
// byte[] bbuf=new byte[1024];
// int len=0;
// while(true){
// len=inputstream.read(bbuf,0,len);
// fout.write(bbuf,0,len);
// if(len<0){
// break;
// }
// }
String disPath= "E:/temp/tp";//存放位置
String requestPath="/upload/mvc/";//数据库保存地址、访问地址
String fileName=picFile.getOriginalFilename();//拿到上传文件名字
FileUtils.copyInputStreamToFile(inputstream,new File(disPath+fileName));//
//赋值，将图片上传后并且将图片地址更新到数据库
Clazz clazz=new Clazz();
clazz.setPic(requestPath+fileName);
clazz.setCid(clazzdto.getCid());
//以上三行代表相对于上面注释代码内容
}catch (Exception e){
e.printStackTrace();
}
return "redirect:/clz/list";
}上传界面
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2022/8/18
Time: 19:25
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>图片上传</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/clz/upload" method="post" enctype="multipart/form-data">
<input type="text" value="${param.cid}" name="cid">
<input type="file" name="picFile">
<input type="submit" >
</form>
</body>
</html>
三、图片下载
1.点击下载传递文件ID,通过文件查询出文件路径
2.通过文件请求地址，转混成文件存放的硬盘地址
3将文件下载下来--固定代码
controlle类
//下载图片
@RequestMapping("/download")
public String download(ClazzDto clazzdto){
try {
Clazz clazz= this.clazzBiz.selectByPrimaryKey(clazzdto.getCid());
String pic=clazz.getPic();//1.png
String disPath= "E:/temp/tp";//存放位置
String requestPath="/upload/mvc/";//数据库保存地址、访问地址
pic=pic.replace(requestPath,disPath);//E:/temp/tp/1.png
//文件名字
String realPath =pic.replace(requestPath,disPath);
String fileName=realPath.substring(realPath.lastIndexOf("/")+1);
//将硬盘中文件下载下来--固定代码
//下载关键代码
File file=new File(realPath);
HttpHeaders headers = new HttpHeaders();//http头信息
String downloadFileName = new String(fileName.getBytes("UTF-8"),"iso-8859-1");//设置编码
headers.setContentDispositionFormData("attachment", downloadFileName);
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
//MediaType:互联网媒介类型 contentType：具体请求中的媒体类型信息
return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),headers,HttpStatus.OK);
}catch (Exception e){
e.printStackTrace();
}
return null;
}
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