Java上传图片并查看
一.配置tomcat：
在tomcat的server.xml配置文件的<Host></Host>标签下加以下内容：
<Context debug="0" docBase="E:/images" path="/showImages" reloadbale="true"/> <Context docBase="projectName" path="/projectName" reloadable="true" source="org.eclipse.jst.jee.server:projectName"/>
二.编写上传图片、解析图片路径代码：
//上传照片
public String uploadImage() {
// 获取当前用户
SysUserAccounts sysUserAccounts = SessionUtil.getSysUserAccounts(getSession());
cusStdCustarchives = customerArchivesBL.getCustomerArchivesByAccountId(sysUserAccounts.getRelationId());
try {
// 初期化信息提示
msg = "";
String fileName;
boolean flg = false;
// 定义显示的消息
StringBuilder uploadMsg = new StringBuilder();
if (uploadImage != null) {
for (int k = 0; k < uploadImage.size(); k++) {
if (uploadImage.get(k) == null || uploadImage.get(k).equals("")) {
uploadMsg.append("上传文件不能为空，请检查！ <br>");
break;
} else {
flg = true;
}
}
} else {
uploadMsg.append("上传文件不能为空，请检查！<br>");
}
if (flg) {
// 把得到的文件的集合通过循环的方式读取处理
for (int i = 0; i < uploadImage.size(); i++) {
String time = new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date());
// 获取上载文件的文件名称
fileName = uploadImageFileName.get(i);
// 获取上载文件的扩展名
String fileNameExtension = fileName.substring(fileName.lastIndexOf(".")).toLowerCase();
// 文件格式CHECK
if (fileNameExtension.equals(".jpg") || fileNameExtension.equals(".gif")
|| fileNameExtension.equals(".png")) {
if (fileName != null) {
// 存放在盘下面的文件名称
String fileNmae2 = time + fileNameExtension;
// 把上传的文件写到指定的路径中
File filepath = new File(getText("filepath") + File.separator + cusStdCustarchives.getRelationId());
// 如果指定的路径没有就创建
if (!filepath.exists()) {
filepath.mkdirs();
}
// 数值格式化
DecimalFormat df = new DecimalFormat("#.00");
ins = new FileInputStream(uploadImage.get(i));
// 文件大小不能大于10M
if (ins.available() < 1024 * 1024 * 5) {
List<CusStdFile> checkList = fileBL.getUploadFileCheckByCustomerRelationId(cusStdCustarchives.getRelationId(), fileName);
if (checkList.size() < 1) {
double result = (double) ins.available() / 1024;
BigDecimal filesize = new BigDecimal(df.format(result));
// 添加文件到数据库中
CusStdFile uploadFile = new CusStdFile();
uploadFile.setClassifyId(cusStdCustarchives.getRelationId());
uploadFile.setModeId(modeId);
uploadFile.setStatus(1);
uploadFile.setFileName(fileName);
uploadFile.setUniqueName(fileNmae2);
uploadFile.setFileurl(filepath.getAbsolutePath());
uploadFile.setFileSize(filesize);
uploadFile.setFileType(fileType);
uploadFile.setCreater(sysUserAccounts.getUsername());
uploadFile.setCreateTime(new Date());
fileBL.savaFile(uploadFile);
// list集合通过get(i)的方式来获取索引
FileUtils.copyFile(uploadImage.get(i), new File(filepath + "/", fileNmae2));
uploadMsg.append("文件： " + fileName + " 上传成功 <br>");
} else {
uploadMsg.append(fileName + " 已存在，请更换文件名再上传！ <br>");
}
} else {
uploadMsg.append("文件大小大于5M，请检查 ！<br>");
}
}
} else {
uploadMsg.append("文件格式不正确，请检查！<br>");
break;
}
}
}
// /显示上载文件的操作成功消息
msg = uploadMsg.toString();
uploadImage = null;
return SUCCESS;
} catch (Exception e) {
return ERROR;
}
}
三.jsp:
<form id="uploadFileform"
action="$!{request.contextPath}/loan/uploadImage" method="post"
enctype="multipart/form-data" >
<center>
<label id="Header" cssClass="HeaderText" value="图片上传" />
<hr style="size: 1" />
<p id="FileList">
<input id="uploadImage" value="2" type="file" name="uploadImage" size="50" />
<img src="$!{request.contextPath}/images/lend/close.png" class="closea">
</p>
<hr style="size: 1" />
<p>温馨提示：只允许上传.jpg .gif .png 后缀的图片</p>
<p style="color:green;">(请务必上传真实证件照片或图片 否则不会通过认证)</p>
<p>
<input class="btn btn-primary" type="button" value="继续添加" onclick="newFile()" />
<input class="btn btn-primary" type="button" value="上传图片" onclick="uploadImages();"/>
</p>
<hr style="size: 1" />
</center>
<p align="center">
<span class="GbText" style="width: 100%; color: red;"></span>
</p>
<input type="hidden" name="fileType" id="codeID" />
<input type="hidden" name="modeId" value="Obj0000009" />
</form>
四.js脚本:
<script>
function deleteNode(obj) {
var parent = obj.parentNode;
if(parent){
parent.remove();
}
}
function newFile() {
$("#FileList").append('<p><input id="uploadImage" value="" type="file" name="uploadImage" size="50" /><a href="javascript:void(0);" onclick="deleteNode(this)" ><img src="$!{request.contextPath}/images/lend/close.png" class="closea"></a></p>');
}
function setCode(code,title) {
$("#uploadTitle").html(title);
$("#FileList").html('<p><input id="uploadImage" value="" type="file" name="uploadImage" size="50" /><a href="javascript:void(0);" onclick="deleteNode(this)" ><img src="$!{request.contextPath}/images/lend/close.png" class="closea"></a></p>');
$("#codeID").val(code);
}
function showImage(imageUrl,title) {
$("#authImage").attr("src", imageUrl);
$("#imageTitle").html(title);
}
function uploadImages() {
var str = $("#uploadImage").val();
if(str.length!=0){
var reg = ".*\\.(jpg|png|gif|JPG|PNG|GIF)";
var r = str.match(reg);
if(r == null){
alert("对不起，您的图片格式不正确，请重新上传");
}
else {
if(window.ActiveXObject) {
var image=new Image();
image.dynsrc=str;
if(image.fileSize>5243000){
alert("上传的图片大小不能超过5M，请重新上传");
return false;
}
}
else{
var size = document.getElementById("uploadImage").files[0].size;
if(size>5243000) {
alert("上传的图片大小不能超过5M，请重新上传");
return false;
}
}
$('#uploadFileform').submit();
}
}
else {
alert("请先上传图片");
}
}
</script>
五.页面上显示图片:
<img src="showImages/2014070005656/20140724100548048.png" />
六.图片存储位置:
七.网站界面:
