将echarts图从页面下载到服务器中保存成png格式
function create(){
AddRunningDiv();
$.ajax({
type : "post",
url:encodeURI(encodeURI('./export-creatFolder')),
dataType:"json",
success:function(m){
//console.log("data2:"+m);
var pm25_avg =downloadPNG(m);
},
error : function(result) {
debugger;
alert("Error");
}
});
}function downloadPNG(tpath){
var isOk = true;
var imgURL = myChartFamily_Off_outFamily_Off_out.getDataURL('png');//获取base64编码
var b64 = imgURL.substring(22);
var imgStr1 = b64.substring(0, b64.length/10);
var imgStr2 = b64.substring(b64.length/10, (b64.length*2)/10);
var imgStr3 = b64.substring((b64.length*2)/10, (b64.length*3)/10);
var imgStr4 = b64.substring((b64.length*3)/10, (b64.length*4)/10);
var imgStr5 = b64.substring((b64.length*4)/10, (b64.length*5)/10);
var imgStr6 = b64.substring((b64.length*5)/10, (b64.length*6)/10);
var imgStr7 = b64.substring((b64.length*6)/10, (b64.length*7)/10);
var imgStr8 = b64.substring((b64.length*7)/10, (b64.length*8)/10);
var imgStr9 = b64.substring((b64.length*8)/10, (b64.length*9)/10);
var imgStr10 = b64.substring((b64.length*9)/10, (b64.length*10)/10);
$("#imgStr1").val(imgStr1);
$("#imgStr2").val(imgStr2);
$("#imgStr3").val(imgStr3);
$("#imgStr4").val(imgStr4);
$("#imgStr5").val(imgStr5);
$("#imgStr6").val(imgStr6);
$("#imgStr7").val(imgStr7);
$("#imgStr8").val(imgStr8);
$("#imgStr9").val(imgStr9);
$("#imgStr10").val(imgStr10);
$("#pathp").val(tpath+"/famiOffOutmap.png");
var imgURLf = myChart.getDataURL('png');//获取base64编码
var b64f = imgURLf.substring(22);
var imgStrf1 = b64f.substring(0, b64.length/10);
var imgStrf2 = b64f.substring(b64.length/10, (b64.length*2)/10);
var imgStrf3 = b64f.substring((b64.length*2)/10, (b64.length*3)/10);
var imgStrf4 = b64f.substring((b64.length*3)/10, (b64.length*4)/10);
var imgStrf5 = b64f.substring((b64.length*4)/10, (b64.length*5)/10);
var imgStrf6 = b64f.substring((b64.length*5)/10, (b64.length*6)/10);
var imgStrf7 = b64f.substring((b64.length*6)/10, (b64.length*7)/10);
var imgStrf8 = b64f.substring((b64.length*7)/10, (b64.length*8)/10);
var imgStrf9 = b64f.substring((b64.length*8)/10, (b64.length*9)/10);
var imgStrf10 = b64f.substring((b64.length*9)/10, (b64.length*10)/10);
$("#imgStrf1").val(imgStrf1);
$("#imgStrf2").val(imgStrf2);
$("#imgStrf3").val(imgStrf3);
$("#imgStrf4").val(imgStrf4);
$("#imgStrf5").val(imgStrf5);
$("#imgStrf6").val(imgStrf6);
$("#imgStrf7").val(imgStrf7);
$("#imgStrf8").val(imgStrf8);
$("#imgStrf9").val(imgStrf9);
$("#imgStrf10").val(imgStrf10);
// $("#pathf").val(tpath+"/famiOffOutmap.png");
$("#pathf").val(tpath+"/pm25avgmap.png");
debugger;
$("#form_hoddenP").submit();
debugger;
return isOk;
} 后台
/**
* 创建以时间+4位随机数命名的文件夹
* @return
*/
@Action(value="/export-creatFolder",results={
/*@Result(name="getAllRule",location="/rule_list.jsp")*/
})
public String creatFolder() throws UnsupportedEncodingException{
java.util.Date current=new java.util.Date();
java.text.SimpleDateFormat sdf=new java.text.SimpleDateFormat("yyyyMMddHHmmss");
String c=sdf.format(current);
Random ran = new Random();
int s = ran.nextInt(9999);
c += s;
String rootPath=getClass().getResource("/").getFile().toString();//获取项目根目录
//System.out.println(rootPath+"=====================================");
rootPath = rootPath.replaceAll("%20", " ");
// System.out.println(rootPath+c+"=====");
File file =new File(rootPath+c);//================== 在这里修改临时保存图片的磁盘路径 =======================
//如果文件夹不存在则创建
if (!file .exists() && !file .isDirectory()){
System.out.println("//不存在");
file .mkdir();
} else {
System.out.println("//目录存在");
}
writeJson1(file.getPath());
return NONE;
} /**
* 将BASE64字符串保存成图片
* @return
*/
@Action(value="/export-downLoadEchartsP",results={
/*@Result(name="getAllRule",location="/rule_list.jsp")*/
})
public String downLoadEcharts(){
//System.out.println("第一张导出");
String imgStr1 = request.getParameter("imgStr1");
String imgStr2 = request.getParameter("imgStr2");
String imgStr3 = request.getParameter("imgStr3");
String imgStr4 = request.getParameter("imgStr4");
String imgStr5 = request.getParameter("imgStr5");
String imgStr6 = request.getParameter("imgStr6");
String imgStr7 = request.getParameter("imgStr7");
String imgStr8 = request.getParameter("imgStr8");
String imgStr9 = request.getParameter("imgStr9");
String imgStr10 = request.getParameter("imgStr10");
String path = request.getParameter("pathp");
String imgStr = imgStr1+imgStr2+imgStr3+imgStr4+imgStr5+imgStr6+imgStr7+imgStr8+imgStr9+imgStr10;
//System.out.println("=================================="+imgStr);
GenerateImage(imgStr,path);
String imgStrf1 = request.getParameter("imgStrf1");
String imgStrf2 = request.getParameter("imgStrf2");
String imgStrf3 = request.getParameter("imgStrf3");
String imgStrf4 = request.getParameter("imgStrf4");
String imgStrf5 = request.getParameter("imgStrf5");
String imgStrf6 = request.getParameter("imgStrf6");
String imgStrf7 = request.getParameter("imgStrf7");
String imgStrf8 = request.getParameter("imgStrf8");
String imgStrf9 = request.getParameter("imgStrf9");
String imgStrf10 = request.getParameter("imgStrf10");
String pathf = request.getParameter("pathf");
String imgStrf = imgStrf1+imgStrf2+imgStrf3+imgStrf4+imgStrf5+imgStrf6+imgStrf7+imgStrf8+imgStrf9+imgStrf10;
//System.out.println("=================================="+imgStr);
GenerateImage(imgStrf,pathf);
return NONE;
}/**
* base64字符串转化成图片
* @param imgStr
* @param path
* @return
*/
public static boolean GenerateImage(String imgStr,String path)
{ //对字节数组字符串进行Base64解码并生成图片
if (imgStr == null) //图像数据为空
return false;
BASE64Decoder decoder = new BASE64Decoder();
try
{
//Base64解码
byte[] b = decoder.decodeBuffer(imgStr);
for(int i=0;i