@WebServlet("/articleManage")
@MultipartConfig(maxFileSize = 1024 * 1024 * 10)
// 最大10MB
public class ArticleManage extends HttpServlet {
private static final long serialVersionUID = 1L
public ArticleManage() {
super()
}
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8")
doPost(request, response)
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String method = request.getParameter("method")
if (method != null) {
if (method.equals("add")) {
addArticle(request, response)
}
}
private void addArticle(HttpServletRequest request,
HttpServletResponse response) {
ArticleService service = new ArticleServiceImpl()
ArticleTypeService typeService=new ArticleTypeServiceImpl()
String content = null
String email = null
String tag = null
String type=null
try {
email = request.getParameter("email")
content = request.getParameter("content")
tag = request.getParameter("tag")
type=request.getParameter("type")
Part img = request.getPart("img")
String imgName = null
if (img != null) {
// 设置文件路径，写到硬盘
String head = img.getHeader("content-disposition")
int index = head.lastIndexOf("=") + 2
imgName = head.substring(index, head.length() - 1)// 上传文件时的文件名
imgName.lastIndexOf(".")
String suffix = imgName.substring(imgName.lastIndexOf("."))// 文件后缀
if (!suffix.equals(".jpeg") &&!suffix.equals(".jpg")
&&!suffix.equals(".png") &&!suffix.equals(".gif")
&&!suffix.equals(".bmp")) {
System.out.println("innn******************")
// 非法文件
request.setAttribute("content", content)
request.setAttribute("email", email)
request.setAttribute("tag", tag)
request.setAttribute("type", type)
request.setAttribute("errorinfo",
"*您上传的文件不合法，只能上后缀为jpg,bmp,png,gif,jpeg的图片")
request.getRequestDispatcher("add.jsp").forward(request,
response)// 重新导航到表单页
return
}
imgName = System.currentTimeMillis() + suffix
img.write(this.getServletContext().getRealPath("/image/upload")
+ File.separator + imgName)// 写到硬盘
}
Article msg = new Article()
msg.setContent(content)
msg.setImg("image/upload/" + imgName)
msg.setEmail(email)
msg.setKeyWord(tag)
msg.setType(typeService.querySingle(Integer.parseInt(type)))
// 从session中取User
User user = (User) request.getSession().getAttribute("user")
msg.setUser(user)
service.addMsg(msg)
response.setCharacterEncoding("utf-8")
response.setContentType("text/html")
response.getWriter()
.write("<html !DOCTYPE html><body><div style='marginautofont-weight:bold'><span style='font-size17px'>投稿成功</span>两秒后跳转到首页...</body></html>")
response.setHeader("refresh", "2url=index.jsp")
} catch (Exception e) {
e.printStackTrace()
request.setAttribute("content", content)
request.setAttribute("email", email)
request.setAttribute("tag", tag)
request.setAttribute("type", type)
request.setAttribute("errorinfo", "投稿失败,请检查上传文件的大小，不能大于10MB")
try {
request.getRequestDispatcher("add.jsp").forward(request,
response)
} catch (ServletException | IOException e1) {
e1.printStackTrace()
}
return
} finally {
try {
service.closeConnResources()
} catch (SQLException e) {
e.printStackTrace()
}
}
}
这是我前几天写的，有问题再问我
获取表单中的信息，然后插入到Mysql中<%@ page language="java" contentType="text/html charset=gbk"
pageEncoding="gbk"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%
int id = Integer.parseInt(request.getParameter("id"))
int rootid = Integer.parseInt(request.getParameter("rootid"))
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html charset=gbk">
<title>Replay</title>
</head>
<body>
<form method="post" action="ReplayOK.jsp">
<input type="hidden" name="id" value="<%=id %>">
<input type="hidden" name="rootid" value="<%=rootid %>">
<table align="center">
<tr>
<td>
<input type="text" name="title" size="80">
</td>
</tr>
<tr>
<td>
<textarea cols="80" rows="20" name="cont"></textarea>
</td>
</tr>
<tr>
<td>
<input type="submit" value="提交">
</td>
</tr>
</table>
</form>
</body>
</html>
---------------------------------------------------------------
下面接收上面表单中传过来的信息，并插入到mysql中
<%@ page language="java" contentType="text/html charset=gbk"
pageEncoding="gbk"%>
<%@ page import="java.sql.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%
request.setCharacterEncoding("GBK")
int id = Integer.parseInt(request.getParameter("id"))
int rootid = Integer.parseInt(request.getParameter("rootid"))
String title = request.getParameter("title")
String cont = request.getParameter("cont").replaceAll("\n","<br/>")
Connection conn = null
Statement st = null
Class.forName("com.mysql.jdbc.Driver")
conn = DriverManager.getConnection("jdbc:mysql://localhost/bbs?user=root&password=690115399")
st = conn.createStatement()
conn.setAutoCommit(false)
String sql = "insert into article values(null,?,?,?,?,now(),0)"
PreparedStatement pstmt = conn.prepareStatement(sql)
pstmt.setInt(1,id)
pstmt.setInt(2,rootid)
pstmt.setString(3,title)
pstmt.setString(4,cont)
pstmt.executeUpdate()
st.executeUpdate("update article set isleaf = 1 where id = " + id)
conn.commit()
conn.setAutoCommit(true)
st.close()
pstmt.close()
conn.close()
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html charset=gbk">
<title>Insert title here</title>
</head>
<body>
<%response.sendRedirect("ShowArticleTree.jsp") %>
</body>
</html>
当然最好的方法还是应该用jsp + JavaBean方式。
....首先..可以选择Apache里面的upload包....这个是把文件传到服务器上的上传组件....然后是存到数据库里....那就要看你什么数据库了....比如Oracle..就是Blob至Access...就是对象
字段....存取方法都是不一样的..要分别对待
有个通用方法，你找到图片文件之后，建立输入流，然后创建bytearrayoutputstream，然后从输入流中读字节到后面那个流中，并冲它里面产生字节数组保存到byte字段中
其实建议你不要将图片直接上传到数据库
图片上传到数据库要用到
blob大对象（以oracle为例），这样影响程序性能，你可以将图片上传到指定文件夹，同时将图片保存的路径+文件名上传到数据库，要显示就读取这个这个路径找到图片，然后显示.刚做了个这个代码
欢迎分享，转载请注明来源：内存溢出
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