How to set a object value bound to a session to JavaScript variable

Question

In a JSP, I store an object value in a HttpSession and I also write a Javascript function to display something on the screen. I need to use the Javascript function to display the object value which is stored in the session. How to set the object value to variable of the JavaScript function. Thanks.

Answer 1

I write a class JavaScriptHelper to convert the object value to variable of the JavaScript;
1.get the data to a javabean from database;
2.convert the data to variable of the JavaScript as a String ;
3.store the object in a HttpSession or Httprequest ;
4.use in Jsp get the String (variable of the JavaScript )
YourBean bean = (YourBean) request.getAttribute("model");
     if (bean != null) out.println(bean .getJsCode())
convert function,(this is only for the matrix):
public static String formatJsCode(Vector vector) {
String sJsCode = "";
//get js head
sJsCode = getJsHeader();
//define js array;
sJsCode += "var data=new Array();\n";
Vector v = null;
String sTemp = "", sLine = "";
for (int i = 0; i < vector.size(); i++) {
v = (Vector) vector.get(i);
sLine = "";
for (int j = 0; j < v.size(); j++) {
sTemp = (String) v.get(j);
//replace " to \"
sTemp = sTemp.replaceAll("\"", "\\\\\\\"");
//escape Html Tag
//sTemp = StringUtil.escapeHTMLTags(sTemp);
//replace \r\n to <br>
sTemp = sTemp.replaceAll("\r\n", "<br>");
if (j != 0)
sLine += ",";
sLine += "\"" + sTemp + "\"";
sJsCode += "data[" + i + "]=new Array(" + sLine + ");\n";
//get js foot
sJsCode += getJsFooter();
return sJsCode;
public static String getJsHeader(){
return "<script language=\"JavaScript\">";
public static String getJsFooter(){
return "</script>";
}