kindeditor存储、回显的前后端与数据库代码,jsp页面,数据库mysql
时间: 2024-05-18 08:18:47 浏览: 168
以下是一个基于KindEditor的文件存储、回显的前后端与数据库代码示例,使用JSP和MySQL实现:
JSP页面代码:
```jsp
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>KindEditor文件存储、回显示例</title>
<!-- 引入KindEditor -->
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/kindeditor/4.1.11/kindeditor-all.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/kindeditor/4.1.11/lang/zh-CN.js"></script>
</head>
<body>
<!-- 创建一个textarea作为KindEditor的编辑器 -->
<textarea id="editor" name="content"></textarea>
<!-- 创建一个按钮用于触发文件上传 -->
<button id="uploadBtn">上传图片</button>
<!-- 显示上传后的图片 -->
<div id="preview"></div>
<script>
$(function() {
// 创建一个KindEditor编辑器
var editor = KindEditor.create('#editor', {
basePath: 'https://cdn.bootcdn.net/ajax/libs/kindeditor/4.1.11/',
uploadJson: '/upload', // 指定上传文件的后端接口
allowFileManager: false
});
// 点击上传按钮时,触发文件上传
$('#uploadBtn').click(function() {
editor.sync(); // 将编辑器中的内容同步到textarea
editor.hideDialog(); // 关闭编辑器的弹窗
// 使用ajax上传文件
$.ajax({
url: '/upload',
type: 'POST',
cache: false,
data: new FormData($('form')[0]), // 表单数据
processData: false,
contentType: false
}).done(function(res) {
if (res.code === 0) {
// 上传成功,显示上传后的图片
$('#preview').html('<img src="' + res.data.url + '">');
} else {
alert(res.msg);
}
}).fail(function() {
alert('上传失败,请重试!');
});
});
// 页面加载时,从数据库中获取图片信息并显示
$.ajax({
url: '/getImages',
type: 'GET'
}).done(function(res) {
if (res.code === 0) {
// 获取图片信息成功,显示所有图片
var images = res.data.images;
for (var i = 0; i < images.length; i++) {
$('#preview').append('<img src="' + images[i].url + '">');
}
} else {
alert(res.msg);
}
}).fail(function() {
alert('获取图片信息失败,请重试!');
});
});
</script>
</body>
</html>
```
后端代码(使用Java + Servlet + MySQL实现):
```java
import java.io.File;
import java.io.IOException;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import com.google.gson.Gson;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
@WebServlet("/upload")
public class UploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("application/json;charset=utf-8");
JsonObject ret = new JsonObject();
try {
// 创建一个DiskFileItemFactory实例,用于处理文件上传
DiskFileItemFactory factory = new DiskFileItemFactory();
// 设置缓冲区大小
factory.setSizeThreshold(1024 * 1024 * 10); // 10MB
// 设置临时文件夹
factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
// 创建一个ServletFileUpload实例,用于解析上传的文件
ServletFileUpload upload = new ServletFileUpload(factory);
// 设置文件上传大小限制
upload.setFileSizeMax(1024 * 1024 * 10); // 10MB
// 解析上传的文件
List<FileItem> items = upload.parseRequest(request);
if (items != null && items.size() > 0) {
for (FileItem item : items) {
if (!item.isFormField()) {
// 处理文件上传
String fileName = item.getName();
String contentType = item.getContentType();
long size = item.getSize();
// 将文件保存到服务器中
File uploadedFile = new File(getServletContext().getRealPath("/uploads"), fileName);
item.write(uploadedFile);
// 将文件信息存储到数据库中
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "123456");
PreparedStatement stmt = conn.prepareStatement("INSERT INTO images (url) VALUES (?)");
stmt.setString(1, "/uploads/" + fileName);
stmt.executeUpdate();
stmt.close();
conn.close();
// 返回上传成功的结果
ret.addProperty("code", 0);
ret.addProperty("msg", "上传成功!");
JsonObject data = new JsonObject();
data.addProperty("url", "/uploads/" + fileName);
ret.add("data", data);
}
}
} else {
ret.addProperty("code", -1);
ret.addProperty("msg", "请选择要上传的文件!");
}
} catch (Exception e) {
ret.addProperty("code", -1);
ret.addProperty("msg", "上传失败:" + e.getMessage());
}
response.getWriter().write(new Gson().toJson(ret));
}
}
@WebServlet("/getImages")
public class GetImagesServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("application/json;charset=utf-8");
JsonObject ret = new JsonObject();
try {
// 从数据库中获取所有图片信息
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "123456");
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM images");
List<Image> images = new ArrayList<>();
while (rs.next()) {
Image image = new Image();
image.setId(rs.getInt("id"));
image.setUrl(rs.getString("url"));
images.add(image);
}
rs.close();
stmt.close();
conn.close();
// 返回获取图片信息成功的结果
ret.addProperty("code", 0);
ret.addProperty("msg", "获取图片信息成功!");
JsonObject data = new JsonObject();
data.add("images", new JsonParser().parse(new Gson().toJson(images)));
ret.add("data", data);
} catch (Exception e) {
ret.addProperty("code", -1);
ret.addProperty("msg", "获取图片信息失败:" + e.getMessage());
}
response.getWriter().write(new Gson().toJson(ret));
}
}
class Image {
private int id;
private String url;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
}
```
数据库代码(使用MySQL实现):
```sql
-- 创建一个名为test的数据库
CREATE DATABASE IF NOT EXISTS test DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
-- 切换到test数据库
USE test;
-- 创建一个名为images的表
CREATE TABLE IF NOT EXISTS images (
id INT(11) NOT NULL AUTO_INCREMENT,
url VARCHAR(255) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_general_ci;
-- 向images表中插入一条记录
INSERT INTO images (url) VALUES ('/uploads/1629436553080.jpg');
```
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