此实现需要修改JFinal源代码，目前该代码实现已经提交给JFinal了，估计下一个版本会添加该功能。想提前用的，自己修改代码重新编译jfinal吧。
修改 com.jfinal.core包下的ModelInjector.java 文件，（替换全部内容）
/** * Copyright (c) 2011-2015, James Zhan 詹波 (jfinal@126.com). * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package com.jfinal.core;import java.lang.reflect.Method;import java.util.Map;import java.util.Map.Entry;import javax.servlet.http.HttpServletRequest;import com.jfinal.kit.StrKit;import com.jfinal.plugin.activerecord.ActiveRecordException;import com.jfinal.plugin.activerecord.Model;import com.jfinal.plugin.activerecord.Table;import com.jfinal.plugin.activerecord.TableMapping;/** * ModelInjector */final class ModelInjector { @SuppressWarnings("unchecked") public static T inject(Class modelClass, HttpServletRequest request, boolean skipConvertError) { String modelName = modelClass.getSimpleName(); return (T)inject(modelClass, StrKit.firstCharToLowerCase(modelName), request, skipConvertError); } @SuppressWarnings({ "rawtypes", "unchecked" }) public static final T inject(Class modelClass, String modelName, HttpServletRequest request, boolean skipConvertError) { Object model = null; try { model = modelClass.newInstance(); } catch (Exception e) { throw new RuntimeException(e); } if (model instanceof Model) injectActiveRecordModel((Model)model, modelName, request, skipConvertError); else injectCommonModel(model, modelName, request, modelClass, skipConvertError); return (T)model; } private static final void injectCommonModel(Object model, String modelName, HttpServletRequest request, Class modelClass, boolean skipConvertError) { Method[] methods = modelClass.getMethods(); //当modelName为null或者“”时，不添加前缀 String modelNameAndDot = ""; if(StrKit.notBlank(modelName)){ modelNameAndDot= modelName + "."; } for (Method method : methods) { String methodName = method.getName(); if (methodName.startsWith("set") == false) // only setter method continue; Class [] types = method.getParameterTypes(); if (types.length != 1) // only one parameter continue; String attrName = methodName.substring(3); String value = request.getParameter(modelNameAndDot + StrKit.firstCharToLowerCase(attrName)); if (value != null) { try { method.invoke(model, TypeConverter.convert(types[0], value)); } catch (Exception e) { if (skipConvertError == false) throw new RuntimeException(e); } } } } @SuppressWarnings("rawtypes") private static final void injectActiveRecordModel(Model model, String modelName, HttpServletRequest request, boolean skipConvertError) { //当modelName为null或者“”时，不添加前缀 String modelNameAndDot = ""; if(StrKit.notBlank(modelName)){ modelNameAndDot= modelName + "."; } Table table = TableMapping.me().getTable(model.getClass()); Map > columnTypeMap = table.getColumnTypeMap(); Map parasMap = request.getParameterMap(); //逐个遍历表字段 for(Entry > entry: columnTypeMap.entrySet()){ String key = modelNameAndDot + entry.getKey(); //request中设定了相应的属性 if(parasMap.containsKey(key)){ Class colType = entry.getValue(); String[] paraValue = parasMap.get(key); try { // Object value = Converter.convert(colType, paraValue != null ? paraValue[0] : null); Object value = paraValue[0] != null ? TypeConverter.convert(colType, paraValue[0]) : null; model.set(entry.getKey(), value); } catch (Exception ex) { if (skipConvertError == false) throw new RuntimeException("Can not convert parameter: " + key, ex); } } } }}
如何使用：
getModel(Model.class,"")
第二个参数为空时，表示获取不加前缀的属性值，部位空时获取相应前缀的属性值。
假定User.class 有 username,password两个属性。
比如getModel(User.class,""),将获取username,password属性。
getModel(User.class,"user"),将获取user.username,user.password属性。