前序：该篇文章将treegrid的使用，侧重于添加节点的方法，如何保存节点到数据库。不过获取节点数据的方法有点傻。将就着，若下次还遇到使用treegrid的情况，将会好好研究一下如何更好的传递节点数据到后台。另外，文章的代码存在小问题。不过都被我用取巧的方法解决掉。
存在的问题：为什么选中根节点后，用getSelected方法，得到的是null？？
取巧的解决方法：初始化treegrid时，顺便加载onClickRow()方法，当选中一行的时候，将该行的id赋值到全局变量selectedSelfid，而当选中根节点时，selectedSelfid就是根节点的id，绕过用getSelected方法。
一、数据库表的设计
存储节点的表A：表主键Aid，节点id，父节点pid，表B的主键Bid，附件（类型为bytea）
表A与表B的关系：多对一
二、页面代码
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ include file="/common/comm.jsp"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<link rel="stylesheet" type="text/css"href="${path}/easyui/themes/bootstrap/easyui.css" />
<link rel="stylesheet" type="text/css"href="${path}/easyui/themes/icon.css" />
<link rel="stylesheet" type="text/css"href="${path}/ztree/css/zTreeStyle/zTreeStyle.css">
<link rel="stylesheet" type="text/css" href="${path}/css/base.css" />
<link rel="stylesheet" type="text/css" href="${path}/css/public.css" />
<script type="text/javascript" src="${path}/js/knockout-3.4.0.js"></script>
<script type="text/javaScript" src="${path}/easyui/jquery-1.7.2.min.js"></script>
<script type="text/javaScript" src="${path}/easyui/jquery.easyui.min.js"></script>
<script type="text/javaScript"src="${path}/easyui/locale/easyui-lang-zh_CN.js"></script>
<script type="text/javaScript"src="${path}/jquery/validate/jquery.form.js"></script>
<script type="text/javaScript" src="${path}/easyui/etreegrid.js"></script>
<script type="text/javascript" src="${path}/js/comm.js"></script>
<script type="text/javaScript" src="${path}/js/base.js"></script>
<script type="text/javaScript" src="${path}/js/tools.js"></script>
<script type="text/javascript" src="${path}/js/constants.js"></script>
<script type="text/javascript" src="${path}/js/artDialog/artDialog.js?skin=blue"></script>
<script type="text/javascript" src="${path}/js/artDialog/plugins/iframeTools.js"></script>
<script type="text/javascript"src="${path}/ztree/jquery.ztree.all-3.5.min.js"></script>
<script type="text/javascript" src="${path}/easyui/validator.js?version=201601191559"></script>
<script type="text/javascript" >
var lastIndex = "" ; //处于编辑状态的节点的selfid
var selectedSelfid ;
$(function() {
$('#plantylecode').combobox({
url:"dictionaryCtrl.do?method=getDictionaryItemsByCategory&type=1&categoryCode=PREPLAN_TYPE",
valueField:'value',
textField:'text',
onLoadSuccess:function(data){
if (data) {
if('${modal}' == 'new')
$('#plantylecode').combobox('setValue',data[0].value);
}
}
});
$('#planlevelcode').combobox({
url:"dictionaryCtrl.do?method=getDictionaryItemsByCategory&type=1&categoryCode=PREPLAN_LEVEL",
valueField:'value',
textField:'text',
onLoadSuccess:function(data){
if (data) {
if('${modal}' == 'new')
$('#planlevelcode').combobox('setValue',data[0].value);
}
}
});
if('${modal}' == 'edit'){
$("#plantylecode").combobox("setValue",'${c.plantypecode}');
$("#planlevelcode").combobox("setValues",'${c.planlevelcode}');
if('${c.attachment}' != '') {
$("td[tdModel*='importFile']").hide();
} else {
$("td[tdModel*='downloadFile']").hide();
}
}
if('${modal}' == 'new'){
$("td[tdModel*='downloadFile']").hide();
}
//初始化treegrid插件
$('#resourcelist').treegrid({
url:"prePlan.do?method=getTreePlan&id="+encodeURI('${id}'),
//data:[{"id":1,"planid":0,"contentitem":"新增222环节名称","contentitemno":1,"pid":-1,"selfid":1,"createtime":new Date(),
// "chilren": [{"id":101,"planid":0,"contentitem":"新增环节名称","contentitemno":1,"pid":1,"selfid":101,"createtime":new Date()},
// {"id":102,"planid":0,"contentitem":"新增环节名称","contentitemno":2,"pid":1,"selfid":102,"createtime":new Date()},
// {"id":103,"planid":0,"contentitem":"新增环节名称","contentitemno":3,"pid":1,"selfid":103,"createtime":new Date()}]}
// ],
nowrap: false,
animate:true,
collapsible:true,
idField:'selfid',
fitColumns: true,
rownumbers:true,
//toolbar:'#tb',
treeField:'contentitem',
columns:[[
{title:'环节',field:'contentitem',width:200,editor:'text'}
]] ,
onDblClickCell:function(field,row){
lastIndex = row.selfid;
$('#resourcelist').treegrid('beginEdit',row.selfid); //进行编辑
},
onClickRow:function(row){
$('#resourcelist').treegrid('endEdit', lastIndex);
selectedSelfid = row.selfid;
lastIndex = ""; //退出编辑后设为空
},
//右键
onContextMenu:function(e,row){
e.preventDefault();
$(this).treegrid('unselectAll');
$(this).treegrid('select', row.selfid);
$('#access_menu').menu('show', {
left: e.pageX,
top: e.pageY
});
},
});
})
function appendNode(parentId, id, selfid, contentitem, pid, planid, contentitemno, createtime){
$('#resourcelist').treegrid('append',{
parent: parentId, //不填此项默认创建根环节
data: [{
id: id,
selfid: selfid,
contentitem: contentitem,
pid: pid,
planid: planid, //后台设置
contentitemno: contentitemno,
createtime: createtime
}]
});
}
function addnode(){
if(lastIndex != "") {
$.messager.alert("系统提示","请先退出当前环节的编辑！");
return false;
}
var row = $('#resourcelist').treegrid('getSelected');
var root=$('#resourcelist').treegrid('getRoot');
if(root != null && row==null){
$.messager.alert("系统提示","请先选中环节！");
return;
}
if(root == null){
//无任何环节的情况下，添加根环节
appendNode('-1', '1', '1','新增环节名称1', '-1', null, '1', new Date());
}
if(row !=null) {
var level=$('#resourcelist').treegrid('getLevel',row.selfid);
if(level==1){
//存在其他根环节的情况下，添加根环节
var roots = $('#resourcelist').treegrid('getRoots');
//遍历所有同级子环节，求得同级子环节的最大值；
var selfmax=parseInt(row.selfid);
var item=0;
for (var i = 0; i < roots.length; i++) {
if(selfmax<parseInt(roots[i].selfid))
selfmax=parseInt(roots[i].selfid);
if(item<roots[i].contentitemno){
item=roots[i].contentitemno;
}
}
var nameId =parseInt(item)+1;
appendNode('-1', selfmax+1, selfmax+1, '新增环节名称'+nameId, '-1', null, nameId, new Date());
} else {
//除了根环节外，添加同级环节
var parent= $('#resourcelist').treegrid('getParent',row.selfid);
//遍历所有同级子环节，求得同级子环节的最大值；
var selfmax=parseInt(row.selfid);
var item=1;
var children=$('#resourcelist').treegrid('getChildren',parent.selfid);
for (var i = 0; i < children.length; i++) {
if(level==$('#resourcelist').treegrid('getLevel',children[i].selfid)) {
if(selfmax<parseInt(children[i].selfid))
selfmax=parseInt(children[i].selfid);
if(item<children[i].contentitemno){
item=children[i].contentitemno;
}
}
}
//添加环节
var nameId = selfmax+1;
appendNode(parent.selfid, selfmax+1, selfmax+1, '新增环节名称'+nameId, parent.selfid, null, item+1, new Date());
}
}
}
//添加子级环节
function addchildnode(){
if(lastIndex != "") {
$.messager.alert("系统提示","请先退出当前环节的编辑！");
return false;
}
var row = $('#resourcelist').treegrid('getSelected');
if(row==null){
alert("请选中环节");
return;
}
var level=$('#resourcelist').treegrid('getLevel',row.selfid);
if(level==3){
$.messager.alert("系统提示","最多只能有三层环节，已是第三层环节！");
return;
}
var children=$('#resourcelist').treegrid('getChildren',row.selfid);
var selfmax=row.selfid*100;
var item=0;
if(children.length>0){
//遍历所有同级子环节，求得同级子环节的最大值；
var childlevel=level+1;
for (var i = 0; i < children.length; i++) {
if(childlevel==$('#resourcelist').treegrid('getLevel',children[i].selfid)){
if(selfmax<parseInt(children[i].selfid))
selfmax=parseInt(children[i].selfid);
if(item<children[i].contentitemno){
item=children[i].contentitemno;
}
}
}
} else {
selfmax=parseInt(row.selfid)*100;
item=0;
}
//添加环节
var nameId = selfmax+1;
appendNode(row.selfid, selfmax+1, selfmax+1, '新增环节名称'+nameId, row.selfid, null, item+1, new Date());
}
//删除环节
function deletenode(){
if(lastIndex != "") {
$.messager.alert("系统提示","请先退出当前环节的编辑！");
return false;
}
var row = $('#resourcelist').treegrid('getSelected');
var level;
var delSelfid;
if(row != null ) {
delSelfid = row.selfid;
} else {
//根节点
delSelfid = selectedSelfid;
}
level=$('#resourcelist').treegrid('getLevel',delSelfid);
if(null != row || level == 1) {
$.messager.confirm("系统提示","您确认要删除这个环节及该环节在的子环节吗？",function(r){
if(r){
$('#resourcelist').treegrid('remove',delSelfid);
}
});
} else {
$.messager.alert("系统提示","请先选中环节！");
return;
}
}
function save(){
if (!$('#myform').form('validate')) {
return false;
}
if(lastIndex != "") {
$.messager.alert("系统提示","请先退出当前环节的编辑！");
return false;
}
//存放要提交的数据：【表单】数据和【环节】数据
var savedata=new Array();
//获取form表单数据
savedata.push({id:'${id}',planname:$("#planname").val(),plantypecode:$("#plantylecode").combobox("getValue"),
plantype:$("#plantylecode").combobox("getText"),planlevelcode:$("#planlevelcode").combobox("getValue"),
planlevel:$("#planlevelcode").combobox("getText"),keyword:$("#keyword").val()});
var roots=$('#resourcelist').treegrid('getRoots');
//获取根环节的数据
for(var i=0;i<roots.length;i++){
var id=roots[i].id;
var planid=roots[i].planid;
var contentitem=roots[i].contentitem;
var contentitemno=roots[i].contentitemno;
var pid=roots[i].pid;
var selfid=roots[i].selfid;
//var createtime=root.createtime;
var createtime=new Date();
savedata.push({id:id,planid:planid,contentitem:contentitem,contentitemno:contentitemno,pid:pid,selfid:selfid,createtime:createtime});
//获取该根环节下的环节的数据
var data2= $('#resourcelist').treegrid('getChildren',roots[i].selfid);
for(var j=0;j<data2.length;j++){
var id=data2[j].id;
var planid=data2[j].planid;
var contentitem=data2[j].contentitem;
var contentitemno=data2[j].contentitemno;
var pid=data2[j].pid;
var selfid=data2[j].selfid;
var createtime=data2[j].createtime;
savedata.push({id:id,planid:planid,contentitem:contentitem,contentitemno:contentitemno,pid:pid,selfid:selfid,createtime:createtime})
}
}
var commitData=new Array();
for(var i=0;i<savedata.length;i++){
commitData.push(JSON.stringify(savedata[i]));
}
$("#commitData").val(commitData);
$('#myform').form('submit',{
url: "prePlan.do?method=savePrePlan",
onSubmit: function(){
var excelfile = $("#attchment").filebox("getValue");
if(excelfile != '') {
var exfile = excelfile.split(".");
if(exfile[1].toUpperCase() != "DOC" && exfile[1].toUpperCase() != "DOCX"){
$.messager.alert('警告','上传文件格式不对 ，请选择WORD文件！');
return false;
}
}
return $(this).form('validate'); //必须用return，不能用$("#myform").submit()；否则成功时不会调用success方法
//$("#myform").submit();
},
success: function(data){
var data = eval('('+data+')');
if (data.code == 1) {
artDialog.opener.$.messager.show({
title : '消息窗口',
msg : decodeURI(data.message)
});
artDialog.opener.$("#planList").datagrid('reload');
artDialog.close();
}else{
$.messager.alert("提示信息",decodeURI(data.message),"error");
}
},
error: function() {
alert('错误');
}
});
}
//右键进行编辑
function beginEdit(){
var row = $('#resourcelist').treegrid('getSelected');
if(row != null ) {
lastIndex = row.selfid;
$('#resourcelist').treegrid('beginEdit',row.selfid);
}
}
//下载附件
function downloadAttachment(id) {
window.location.href = "prePlan.do?method=downloadAttachment&id="+id;
}
//重新上传附件
function importAgain() {
$("td[tdModel*='importFile']").show();
$("td[tdModel*='downloadFile']").hide();
}
//结束编辑
$(document).ready(function(){
$("#body").bind("keydown",function(e){
// 兼容FF和IE和Opera
var theEvent = e || window.event;
var code = theEvent.keyCode || theEvent.which || theEvent.charCode;
if (code == 13) {
//回车执行查询
$('#resourcelist').treegrid('endEdit', lastIndex);
lastIndex = "";
}
});
});
</script>
<style type="text/css">
.tree-folder-open, .tree-file, .tree-folder {
background: url(images/org.png)
no-repeat center center;
}
</style>
</head>
<body class="easyui-layout" id="body">
<div id="access_menu" class="easyui-menu" style="width:100px;">
<div id='access_menu_new' data-options="iconCls:'icon-add'" onclick="addnode()">新增同级环节</div>
<div id='access_menu_new' data-options="iconCls:'icon-add'" onclick="addchildnode()">新增子环节</div>
<div id='access_menu_edit'data-options="iconCls:'icon-edit'" onclick="beginEdit()" >编辑本环节</div>
<div id='access_menu_del' data-options="iconCls:'icon-remove'" onclick="deletenode();">删除本环节</div>
<!-- <div id='access_menu_refresh'>刷新环节</div> -->
</div>
<div style="height:14%">
<form id="myform" name="myform" method="post" enctype="multipart/form-data">
<!-- 存放数据 2016.5.6 -->
<input id="commitData" name="commitData" type="hidden" />
<table id="searchtable" width="100%" >
<tr height="40">
<td width="10%" align="right"><label style="color: red;">*</label>预案名称：</td>
<td width="20%" class="body"><input type="text" class="easyui-validatebox" required="true" style="border-radius:5px;width: 98%;height:20px" name="planname" id="planname" value="${c.planname}" /></td>
<td width="10%" align="right">预案类型：</td>
<td width="12%" class="body"><input style="width: 98%" class="easyui-combobox" name="plantylecode" id="plantylecode" /></td>
<td width="10%" align="right">预案等级：</td>
<td width="12%" class="body"><input style="width: 98%" class="easyui-combobox" name="planlevelcode" id="planlevelcode" /></td>
</tr>
<tr>
<td align="right">文本附件：</td>
<td tdModel="downloadFile"><a href="javascript:void(0)" style="color:red;margin-right:10px" onclick="downloadAttachment(${id})">下载附件</a> <a href="javascript:void(0)" style="color:blue" onclick="importAgain()">重新上传</a></td>
<td tdModel="importFile"><input name="attchment" id="attchment" class="easyui-filebox" data-options="prompt:'请选择文件...'" style="width:250px" /></td>
<td align="right">关键词：</td>
<td colspan="3"><input type="text" style="border-radius:5px;width: 98%;height:20px" name="keyword" id="keyword" value="${c.keyword}"/></td>
</tr>
</table>
</form>
</div>
<div style="height:80%;width:100%" fit="true">
<div id="tb" style="margin-bottom:3px;">
<!--<a href="javascript:void(0)" class="easyui-linkbutton" onclick="addRoot()">添加同级环节</a>-->
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="addnode()">添加同级环节</a>
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="addchildnode()">添加子级环节</a>
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="deletenode()">删除</a>
<span style="color:red;float:right;margin-right:20px"> * 回车或单击另一行可退出编辑状态</span>
</div>
<table id="resourcelist" style="width:800px;height:370px"></table>
<div style="margin-top:10px"><a href="javascript:void(0)" class="easyui-linkbutton" onclick="save()">保存</a></div>
</div>
</body>
</html>
其中，treegrid初始化时加载的URL的代码如下，实现了默认加载节点
@RequestMapping(params = "method=getTreePlan")
@ResponseBody
public List<Map<String,Object>> getTreePlan(HttpServletRequest request,
HttpServletResponse response) throws Exception {
String id = request.getParameter("id");
List<Map<String, Object>> list1 = new ArrayList<Map<String,Object>>();
if("0".equals(id)) {
//data:[{"id":1,"planid":0,"contentitem":"新增方案名称","contentitemno":1,"pid":-1,"selfid":1,"createtime":{"date":25,"day":1,"hours":16,"minutes":38,"month":3,"nanos":0,"seconds":59,"time":1461573539000,"timezoneOffset":-480,"year":116}}],
JSONObject dateJson = JSONObject.fromObject(new Date());
String jsonData = "{'contentitem':'新增环节名称1','contentitemno':1,'createtime':"+dateJson+",'id':1,'pid':-1,'planid':'','selfid':1," +
"'children':[{'contentitem':'新增环节名称101','contentitemno':1,'createtime':"+dateJson+",'id':101,'pid':1,'planid':'','selfid':101}," +
"{'contentitem':'新增环节名称102','contentitemno':2,'createtime':"+dateJson+",'id':102,'pid':1,'planid':'','selfid':102}" +
"]}";
list1.add(parseJSON2Map(jsonData));
} else {
Map map = new HashMap();
map.put("id", id);
List<Map<String,Object>> menuNodes = new ArrayList<Map<String,Object>>();
JSONArray ja = this.manager.getPrePlanTree(map);
Iterator<JSONObject> it =ja.iterator();
while(it.hasNext()){
JSONObject json2 = it.next();
list1.add(parseJSON2Map(json2.toString()));
}
}
return list1;
}
三、效果图
四、后台保存方法
1、controller代码
@RequestMapping
@ResponseBody
public Map savePrePlan(HttpServletRequest request,HttpServletResponse response, String commitData) throws IOException {
//[{"id":"0","planname":"254","plantypecode":"交通事故","plantype":"交通事故","planlevelcode":"二级预案","planlevel":"二级预案","keyword":""}, {"id":1,"planid":0,"contentitem":"新增方案名称","contentitemno":1,"pid":-1,"selfid":1,"createtime":{"date":25,"day":1,"hours":16,"minutes":38,"month":3,"nanos":0,"seconds":59,"time":1461573539000,"timezoneOffset":-480,"year":116}}]
//{"id":"0","planname":"1111","plantypecode":"交通事故","plantype":"交通事故","planlevelcode":"二级预案","planlevel":"二级预案","keyword":""},{"id":101,"planid":null,"contentitem":"新增环节1","contentitemno":1,"pid":"1","selfid":101,"createtime":"2016-05-09T06:07:28.317Z"},{"id":10101,"planid":null,"contentitem":"新增环节1.1","contentitemno":1,"pid":101,"selfid":10101,"createtime":"2016-05-09T06:07:35.466Z"},{"id":10102,"planid":null,"contentitem":"新增环节1.2","contentitemno":1,"pid":101,"selfid":10102,"createtime":"2016-05-09T06:07:41.442Z"},{"id":102,"planid":null,"contentitem":"新增环节","contentitemno":1,"pid":"1","selfid":102,"createtime":"2016-05-09T06:07:47.846Z"},{"id":null,"planid":null,"contentitem":"新增预案名称1","contentitemno":"1","pid":"-1","selfid":"1","createtime":"2016-05-09T06:07:55.255Z"}
//将字符串转成json数组
JSONArray jsonArray = JSONArray.fromObject("["+commitData+"]" );
if(jsonArray.size()>0){
//步骤一，获取附件
MultipartHttpServletRequest mrequest = (MultipartHttpServletRequest) request;
MultipartFile multipartFile = mrequest.getFile("attchment");
File file = null;
if(StringUtils.isNotEmpty(multipartFile.getOriginalFilename())) {
//获取file文件
CommonsMultipartFile cmf = (CommonsMultipartFile) multipartFile;
DiskFileItem dfi = (DiskFileItem)cmf.getFileItem();
file = dfi.getStoreLocation();
//验证文件大小
if (file.exists() && file.isFile()){
if(file.length()/1024/1024 > 10)
return Common.messageBox("文本附件过大，请上传10M内的文件！", "0");
}else{
return Common.messageBox("文件不存在！", "0");
}
}
//步骤二，获取当前登录人
UserSession userSession = (UserSession) request.getSession().getAttribute("userSession");
//步骤三，处理form表单数据，转成实体
JSONObject planObject = JSONObject.fromObject(jsonArray.get(0));
PrePlan plan = (PrePlan)JSONObject.toBean(planObject,PrePlan.class);
//步骤四，获取节点数据
List<PrePlanContent> contentlist=new ArrayList<PrePlanContent>();//得到预案对象
for(int i=1;i<jsonArray.size();i++){
JSONObject jsonObject = JSONObject.fromObject(jsonArray.get(i)); //把json格式的字符串，转换成json对象
//JSONArray ja = JSONArray.fromObject(jsonObject);
PrePlanContent prePlanContent=(PrePlanContent)JSONObject.toBean(jsonObject,PrePlanContent.class);
if(prePlanContent!=null)
contentlist.add(prePlanContent);
}
try {
//步骤五，保存数据
this.manager.savePlanContent(contentlist, plan, userSession, file);
return Common.messageBox("保存成功！", "1");
} catch (Exception e) {
e.printStackTrace();
String msg = e.getMessage();
if ((msg == null) || ("".equals(msg))) {
msg = "NullPointerException";
} else {
msg = "保存失败！";
}
return Common.messageBox(msg, "0");
}
} else {
return Common.messageBox("获取页面数据失败！", "0");
}
}
2、manager中的保存数据方法
public void savePlanContent(List<PrePlanContent> planlist,PrePlan plan, UserSession userSession, File file)
throws Exception {
PrePlan oldplan = null;
byte[] byteData = null;
if(null != file) {
//转成流
InputStream ips = new FileInputStream(file);
//转成字节数组
byteData = new byte[(int) file.length()];
ips.read(byteData, 0, byteData.length);
}
if(StringUtils.isNotEmpty(plan.getId()+"") && plan.getId() != 0){//修改
oldplan=this.dao.getPrePlanById(plan.getId());
plan.setStatuscode(oldplan.getStatuscode());
plan.setStatus(oldplan.getStatus());
plan.setCreatetime(oldplan.getCreatetime());
plan.setCreateperson(oldplan.getCreateperson());
if(null == byteData) {//修改时没上传新附件
plan.setAttachment(oldplan.getAttachment());
} else {//修改时上传新附件
plan.setAttachment(byteData);
}
} else{//新增
plan.setStatus("待审核");
plan.setStatuscode((long) 1);
plan.setCreatetime(new Date());
plan.setAttachment(byteData);
if(null!=userSession)
plan.setCreateperson(userSession.getSysuser().getYhmc());
}
this.dao.savePlanContent(planlist, plan);
}
3、dao方法
@Transactional
public Long savePlanContent(List<PrePlanContent> planlist,PrePlan plan) throws Exception {
long count = 0;
//新增预案
if(plan.getId()==null || plan.getId() == 0){
//plan.setAttachment(byteData);
count = (Long) getCurrentSession().save(plan);
//对预案内容的planid进行设置
for(int i=0;i<planlist.size();i++){
planlist.get(i).setId(null);
planlist.get(i).setPlanid(count);
getCurrentSession().save(planlist.get(i));
}
}else{//修改预案
PrePlan onl = (PrePlan) getCurrentSession().merge(plan);
getCurrentSession().update(onl);
this.getCurrentSession().createQuery("delete from PrePlanContent where planid="+onl.getId()).executeUpdate();
for(int i=0;i<planlist.size();i++){
planlist.get(i).setPlanid(onl.getId());
PrePlanContent current=planlist.get(i);
count=(Long)getCurrentSession().save(current);
}
}
return count;
}
五、实现下载数据库保存的二进制文件
@RequestMapping
public void downloadAttachment(String id, HttpServletRequest request,HttpServletResponse response) throws Exception {
PrePlan p = new PrePlan();
OutputStream ops = null;
try {
p = manager.getPrePlanById(Long.parseLong(id)); //查出存储二进制文件的实体
try {
ops = response.getOutputStream();
BufferedOutputStream stream = new BufferedOutputStream(ops);
// 输出内容文件流，提供下载
response.reset();
response.setContentType("application/x-msdownload");
// 文件名
String fileName ="【"+p.getPlanname()+"】文本附件.docx";
String name = "attachment; filename=\"" + fileName + "\"";
response.addHeader("Content-Disposition", new String(name.getBytes("gb2312"), "iso-8859-1"));
stream.write(p.getAttachment());
} catch (Exception ex) {
ex.printStackTrace();
} finally {
ops.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
时间： 2024-10-03 14:45:15