form表单回写技术java实现

 /**   * 回写表单   *   * @param mRequest   * @return   */  public static String writeBackMapToForm(Map mRequest) {    return writeBackMapToForm(mRequest, new String[]{}, "writeBackMapToForm");  }  /**   * 回写表单   *   * @param mRequest   * @param ignoreName 定义哪些key值的input不回写   * @return   */  public static String writeBackMapToForm(Map mRequest, String[] ignoreName, String jsFunctionName) {  mRequest.remove("checkbox_template"); //不回写列表中checkbox的值    StringBuffer rtValue = new StringBuffer();    rtValue.append(" var mForm = new Object();/n");    rtValue.append(" var indexArray = new Array();/n");    rtValue.append(" function writeBackMapToForm() {/n");    Iterator itMRequest = mRequest.keySet().iterator();    while (itMRequest.hasNext()) {      String tempKey = (String) itMRequest.next();      Object tempValue = mRequest.get(tempKey);      if (tempKey.startsWith("VENUS") || tempKey.startsWith("RANMIN")) {        continue;              }      if (RmStringHelper.ArrayContainString(ignoreName, tempKey)) {        continue;              }      String tempValueNew = "";      if (tempValue instanceof String) { //如果是单值，直接注入        tempValueNew = RmStringHelper.replaceStringToScript((String)tempValue); //从数据库中取出来以后需要转换1次        rtValue.append("  indexArray[indexArray.length] = /"" + tempKey + "/";/n");        rtValue.append("  mForm[/"" + tempKey + "/"] = /"" + tempValueNew + "/";/n");      } else if (tempValue instanceof String[]) { //如果是多值，放入数组        rtValue.append("  indexArray[indexArray.length] = /"" + tempKey + "/";/n");        String[] myArray = (String[]) tempValue;        if ( tempKey.equals("cmd") ){          tempValueNew = RmStringHelper.replaceStringToScript(myArray[0]);          rtValue.append("  mForm[/"" + tempKey + "/"] = /"" + tempValueNew + "/";/n");        } else {          rtValue.append("  mForm[/"" + tempKey + "/"] = [");          for (int i = 0; i < myArray.length; i++) {            if (i > 0)              rtValue.append(",");            tempValueNew = RmStringHelper.replaceStringToScript(myArray[i]);            rtValue.append("/"" + tempValueNew + "/"");          }          rtValue.append("];/n");        }      } else if (tempValue instanceof Timestamp) { //如果是时间戳，直接注入        if(tempValue == null) {          continue;        }        tempValueNew = RmStringHelper.replaceStringToScript(tempValue.toString().substring(0,19));        rtValue.append("  indexArray[indexArray.length] = /"" + tempKey + "/";/n");        rtValue.append("  mForm[/"" + tempKey + "/"] = /"" + tempValueNew + "/";/n");      } else if (tempValue instanceof BigDecimal){        tempValueNew = RmStringHelper.replaceStringToScript(tempValue.toString());    rtValue.append("  indexArray[indexArray.length] = /""        + tempKey + "/";/n");    rtValue.append("  mForm[/"" + tempKey + "/"] = /""        + tempValueNew + "/";/n");      } else {        if(tempValue != null) {          RmStringHelper.log("在回写页面时，遇到了未知java类型:" + tempValue);                  }        continue;      }    }    rtValue.append("  for(var i=0; i<indexArray.length; i++) {/n");    rtValue.append("   writeBackValue(indexArray[i]);/n");    rtValue.append("  }/n");    rtValue.append(" }/n");    rtValue.append(jsFunctionName + "();/n");    return rtValue.toString();  }//通过此方法将request中的值放入mForm对象中var mForm = new Object(); var indexArray = new Array(); function writeBackMapToForm() {  indexArray[indexArray.length] = "att_id";  mForm["att_id"] = "";  indexArray[indexArray.length] = "businessTypeOID";  mForm["businessTypeOID"] = [""];  indexArray[indexArray.length] = "business_type1";  mForm["business_type1"] = "";  indexArray[indexArray.length] = "business_type2";  mForm["business_type2"] = "1";  indexArray[indexArray.length] = "cmd";  mForm["cmd"] = "saveExamineRule";  indexArray[indexArray.length] = "document_content";  mForm["document_content"] = "s2";  indexArray[indexArray.length] = "file_path";  mForm["file_path"] = "";  indexArray[indexArray.length] = "file_template";  mForm["file_template"] = "";  indexArray[indexArray.length] = "gxl";  mForm["gxl"] = "null";  indexArray[indexArray.length] = "owner_id";  mForm["owner_id"] = "s1";  for(var i=0; i<indexArray.length; i++) {   writeBackValue(indexArray[i]);  } }writeBackMapToForm(); 关键语句jsp页面中加入后输出调用js方法： <script language="javascript"><% //表单回写  if(request.getAttribute(RuleExamineConstants.REQUEST_WRITE_BACK_FORM_VALUES) != null) { //如果request中取出的表单回写bean不为空    out.print(RmVoHelper.writeBackMapToForm((java.util.Map)request.getAttribute(RuleExamineConstants.REQUEST_WRITE_BACK_FORM_VALUES))); //输出表单回写方法的脚本  } Map mapt = (java.util.Map)request.getAttribute(RuleExamineConstants.REQUEST_WRITE_BACK_FORM_VALUES); System.out.print("infois:"+mapt.entrySet()); out.print("alert(1);");%></script> //上面语句实际上注入的js格式内容如：var mForm = new Object(); var indexArray = new Array(); function writeBackMapToForm() {  indexArray[indexArray.length] = "_function_id_";  mForm["_function_id_"] = "3670212500000000050";  indexArray[indexArray.length] = "cmd";  mForm["cmd"] = "listBusinessTypePage";  for(var i=0; i<indexArray.length; i++) {   writeBackValue(indexArray[i]);  } }writeBackMapToForm();      //注入后调用js回写表单方法function writeBackValue(inputName) {if(form.elements[inputName] == undefined) {  return false;}if(form.elements[inputName].value != undefined) {   form.elements[inputName].value = mForm[inputName];     } if(form.elements[inputName].length != undefined ) {   var thisValue = mForm[inputName];  if(mForm[inputName][0] == undefined) {    thisValue = new Array();    thisValue[thisValue.length] = mForm[inputName];               }  if(form.elements[inputName].length != null) {     var tempLength = form.elements[inputName].length;    for(var j=0; j<tempLength; j++) {      var thisObj = form.elements[inputName][j];      for(var k=0; k<thisValue.length; k++) {        if(thisObj.value == thisValue[k]) {           if( thisObj.checked != undefined) {            thisObj.checked = true;             break;                           } else if( thisObj.selected != undefined) {            thisObj.selected = true;                            break;          }        } else {                         if( thisObj.checked != undefined) {            thisObj.checked = false;            } else if( thisObj.selected != undefined) {            thisObj.selected = false;                            }            }        }      }    }               }}