json与java转换

dojo part:
userInfo.registerOrUpdateUser = function(formID, isNewOrUpdate) {
    var isSendNotification = dojo.byId('userReg.sendNotification').checked;
var action = "";
    if (isNewOrUpdate == 'new') {
    action = "mngrUserActionBean.registerUser";
    } else if (isNewOrUpdate == 'update') {
    action = "mngrUserActionBean.updateUser";
    }

var callback = function(response, xhr){
if(isAjaxSuccess(xhr)){
mtpGrid.refresh('userReg','refresh');
dojo.byId("userReg.cancelBtn").click();
}
};

    var params = {};
    params.name = dijit.byId('user.name').attr('value');
    params.location = dijit.byId('user.location').attr('value');
    if (isNewOrUpdate == 'update') {
    params.userId = dojo.byId('userReg.userId').value;
    }
    params.contact = dijit.byId('user.contact').attr('value');
    params.email = dijit.byId('user.email').attr('value');
    params.notesId = dijit.byId('user.notesId').attr('value');
    params.roleList = dojo.toJson(userInfo.getRoleJson());
   
    var url = CENTRAL_CONTROLLER + '?' + PARAM_ACTION + '=' + action;
url += '&isSendNotification='+isSendNotification;
dojoAjaxPost(params, url, null, callback);
   
    }


    userInfo.getRoleJson = function() {
       
    var rolesInfoTbl = dojo.byId('mgrRegInfoTbl.rolesInfoTbl');
    var rolesInfoTblLen = rolesInfoTbl.rows.length;
    var roleList = new Array();
    for (var i = 1; i < rolesInfoTblLen; i++) {
        var roleObj = {};
    var role = rolesInfoTbl.rows[i].cells[3].innerHTML;
    roleObj.role = role;
    //var divsions = rolesInfoTbl.rows[i].cells[1].innerHTML;
    //roleObj.divsions = divsions;
    var languages = rolesInfoTbl.rows[i].cells[4].innerHTML;
    roleObj.languages = languages;
    roleList.push(roleObj);
    }
   
    return roleList;
    }


java part:

private void setUserRoleInfo(String roleJsonObj) {

if (roleJsonObj == null || roleJsonObj.trim().length() == 0) {
return;
}
JSONArray jsonArray = JSONArray.fromObject( roleJsonObj);
Iterator<JSONObject> iterator = jsonArray.iterator();
List<Role> roleList = new ArrayList<Role>();
while(iterator.hasNext()) {
JSONObject jsonObj = iterator.next();

Role role = new Role();
role.setRoleId((String)jsonObj.get("role"));

// Add current division
List<BusinessUnit> buList = new ArrayList<BusinessUnit>();
buList.add(userSession.getCurrentDiv());
role.setDivisions(buList);

/*String divisions = (String)jsonObj.get("divsions");
String[] buArr = divisions.split(",");
List<BusinessUnit> buList = new ArrayList<BusinessUnit>();
for (String buCode : buArr) {
BusinessUnit bu = new BusinessUnit();
bu.setBU_Code(buCode.replace(GenConst.HTML_AND, GenConst.DB_AND));
buList.add(bu);
}

role.setDivisions(