ssm框架实现图片上传显示并保存地址到数据库

本案例是通过springmvc+spring+mybatis框架以商品上传为例，实现的图片上传功能，并把图片的地址保存到数据库并在前台显示上传的图片。

本项目是使用maven搭建的项目，首先看下项目结构

相关配置自行搜索，下边直接实现上传功能

1.创建数据库

DROP TABLE IF EXISTS `product`;
CREATE TABLE `product` (
  `pid` int(11) NOT NULL AUTO_INCREMENT,
  `pimage` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`pid`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of product
-- ----------------------------
INSERT INTO `product` VALUES ('2', '6c648d82-dc29-4b92-855e-491741e092a21.jpg');
INSERT INTO `product` VALUES ('3', '80f26905-7342-492c-be6e-c3f0ad81c2aa1.jpg');
INSERT INTO `product` VALUES ('4', 'c3d28f16-4b17-4568-8877-ff1fd4e514a31.jpg');
INSERT INTO `product` VALUES ('5', 'bb8070e8-5b3f-4be2-83d6-698dd6169dca');

2.创建商品实体类product

public class Product {
    private Integer pid;
    private String pimage;
    public Integer getPid() {
        return pid;
    }
    public void setPid(Integer pid) {
        this.pid = pid;
    }
    public String getPimage() {
        return pimage;
    }
    public void setPimage(String pimage) {
        this.pimage = pimage;
    }
    @Override
    public String toString() {
        return "Product [pid=" + pid + ", pimage=" + pimage + "]";
    }

3.创建ProductController

@Controller
public class ProductController {
    //注入ProductService
    @Autowired
    private ProductService productService;
    
    //查询所有用户
    @RequestMapping("/list.do")
    public String listUser( Model model){
        List<Product> list= productService.list();
        model.addAttribute("list",list);
        System.out.println(list);
        return "list";
    }
    
    /**
     * 保存商品
     * @param image
     * @param product
     * @param map
     * @return
     * @throws IOException
     */
    @RequestMapping("/addProduct.do")
    public String fileUpload(MultipartFile file,Product product, ModelMap map) throws IOException {

        /**
         * 上传图片
         */
        //图片上传成功后，将图片的地址写到数据库
        String filePath = "E:\\upload";//保存图片的路径
        //获取原始图片的拓展名
        String originalFilename = file.getOriginalFilename();
        //新的文件名字
        String newFileName = UUID.randomUUID()+originalFilename;
　　　　 //封装上传文件位置的全路径
        File targetFile 
= new File(filePath,newFileName); 
　　　　 //把本地文件上传到封装上传文件位置的全路径
        file.transferTo(targetFile);
        product.setPimage(newFileName);
        
        
/**
         * 保存商品
         */
        productService.save(product);
        return "redirect:/list.do"; 
    }
}

4.创建接口ProductService

package com.ssm.service;

import java.util.List;

import com.ssm.entity.Product;

public interface ProductService {

    List<Product> list();

    void save(Product product);

}

5.创建实现类ProductServiceImpl

@Service
@Transactional
public class ProductServiceImpl implements ProductService {
    //注入ProductMapper
    @Autowired
    private ProductMapper productMapper;
    
    @Override
    public List<Product> list() {
        
        return productMapper.list();
    }

    @Override
    public void save(Product product) {
        productMapper.save(product);
    }
}

6.创建Mapper接口

public interface ProductMapper {
    //保存商品
    void save(Product product);
    //查询商品
    List<Product> list();
}

7.创建Mapper.xml

<mapper namespace="com.ssm.mapper.ProductMapper">
    
      <!-- 添加 -->
    <insert id="save" parameterType="com.ssm.entity.Product" >
        insert into product(pimage) values (#{pimage})    
    </insert> 
    
    <!-- 查询用户-->
    <select id="list" resultType="com.ssm.entity.Product">
        select * from product
    </select> 
    
</mapper>

8.首页index.jsp

<body>
    <form action="addProduct.do" method="post" enctype="multipart/form-data">
        图片：<input type="file" name="file">
        <input type="submit" value="提交">
    </form>
</body>

9.显示列表list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!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 rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css"/>
<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<title>Insert title here</title>
<style type="text/css">
    #images{
        width: 50px;
        height: 50px;
    }
</style>
</head>
<body>
    <table class="table table-bordered table-hover">
        <tr>
            <th>序号</th>
            <th>图片</th>            
        </tr>
        <c:forEach items="${list}" var="product" >
            <tr>
                <th>${product.pid }</th>
                <th><c:if test="${product.pimage !=null }">
                    <img id="images" alt="" src="/image/${product.pimage }">
                </c:if> </th>          
            </tr>
        </c:forEach>
    </table>
</body>
</html>

最后说一下我的图片上传保存的位置是在本地，我是通过tomcat进行设置的，如下图：

图片上传过程完成。

DROP TABLE IF EXISTS `product`;CREATE TABLE `product` ( `pid` int(11) NOT NULL AUTO_INCREMENT, `pimage` varchar(255) DEFAULT NULL, PRIMARY KEY (`pid`)) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;
-- ------------------------------ Records of product-- ----------------------------INSERT INTO `product` VALUES ('2', '6c648d82-dc29-4b92-855e-491741e092a21.jpg');INSERT INTO `product` VALUES ('3', '80f26905-7342-492c-be6e-c3f0ad81c2aa1.jpg');INSERT INTO `product` VALUES ('4', 'c3d28f16-4b17-4568-8877-ff1fd4e514a31.jpg');INSERT INTO `product` VALUES ('5', 'bb8070e8-5b3f-4be2-83d6-698dd6169dca');

来源：oschina

链接：https://my.oschina.net/u/4320183/blog/4470145

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