jfinal将页面提交数组对象转换成List<Model>

永久禁言 · 发表于 2013-2-25 15:41:32

JFinal是一个比较快速的JAVA WEB开发框架，一直在关注，最近用的比较多，项目中遇到页面提交一组MODEL数据提交的场景，但JFinal未尚未提供实现，因此临时写了一个，现在分享出来，给大家提供一个思路，代码仅供参考，如果不当之处请批评指正。

调用方法：
List<Const> beanList = ModelUtils.batchInjectModel(getRequest(),Const.class,"beans");

package com.jfinal.core;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.servlet.http.HttpServletRequest;
import com.jfinal.plugin.activerecord.Model;
/**
* Model Tools
*
* @author wangkai
* @date Feb 14, 2013 1:43:37 PM
*
*/
public class ModelUtils {
/**
* 将页面中的数组对象转换成List<Model>
*
* @param <T>
* @param request
* @param modelClass
* @param prefix
* @return
*
* @author wangkai
* @date Feb 14, 2013
*
*/
@SuppressWarnings("unchecked")
public static <T> List<T> batchInjectModel(
final HttpServletRequest request,
Class<? extends Model> modelClass, String prefix) {
List<T> modelList = new ArrayList<T>();
int size = getArrayLength(request, prefix);
for (int i = 0; i < size; i++) {
modelList.add((T) ModelInjector.inject(modelClass, prefix + "[" + i
+ "]", request, false));
}
return modelList;
}
/**
* Get array key beans[0].ID -->beans[0] beans[1].ID -->beans[1]
*
* @param request
* @param prefix
* @return
*
* @author wangkai
* @date Feb 14, 2013
*
*/
@SuppressWarnings("unchecked")
public static Set<String> getArrayKeys(final HttpServletRequest request,
String prefix) {
Set<String> keys = new HashSet<String>();
String arrayPrefix = prefix + "[";
String key = null;
Enumeration<String> names = request.getParameterNames();
while (names.hasMoreElements()) {
key = names.nextElement();
if (!key.startsWith(arrayPrefix)) {
continue;
}
if (key.indexOf("]") == -1) {
continue;
}
keys.add(key.substring(0, key.indexOf("]") + 1));// Get all bean[X]
}
return keys;
}
/**
* Get array length
*
* @param request
* @param prefix
* @return
*
* @author wangkai
* @date Feb 14, 2013
*
*/
public static int getArrayLength(final HttpServletRequest request,
String prefix) {
return getArrayKeys(request, prefix).size();
}
}

复制代码

package com.jfinal.core;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.servlet.http.HttpServletRequest;
import com.jfinal.plugin.activerecord.Model;
/**
* Model Tools
*
* @author wangkai
* @date Feb 14, 2013 1:43:37 PM
*
*/
public class ModelUtils {
/**
* 将页面中的数组对象转换成List<Model>
*
* @param <T>
* @param request
* @param modelClass
* @param prefix
* @return
*
* @author wangkai
* @date Feb 14, 2013
*
*/
@SuppressWarnings("unchecked")
public static <T> List<T> batchInjectModel(
final HttpServletRequest request,
Class<? extends Model> modelClass, String prefix) {
List<T> modelList = new ArrayList<T>();
int size = getArrayLength(request, prefix);
for (int i = 0; i < size; i++) {
modelList.add((T) ModelInjector.inject(modelClass, prefix + "[" + i
+ "]", request, false));
}
return modelList;
}
/**
* Get array key beans[0].ID -->beans[0] beans[1].ID -->beans[1]
*
* @param request
* @param prefix
* @return
*
* @author wangkai
* @date Feb 14, 2013
*
*/
@SuppressWarnings("unchecked")
public static Set<String> getArrayKeys(final HttpServletRequest request,
String prefix) {
Set<String> keys = new HashSet<String>();
String arrayPrefix = prefix + "[";
String key = null;
Enumeration<String> names = request.getParameterNames();
while (names.hasMoreElements()) {
key = names.nextElement();
if (!key.startsWith(arrayPrefix)) {
continue;
}
if (key.indexOf("]") == -1) {
continue;
}
keys.add(key.substring(0, key.indexOf("]") + 1));// Get all bean[X]
}
return keys;
}
/**
* Get array length
*
* @param request
* @param prefix
* @return
*
* @author wangkai
* @date Feb 14, 2013
*
*/
public static int getArrayLength(final HttpServletRequest request,
String prefix) {
return getArrayKeys(request, prefix).size();
}
}

复制代码

<#list beans as x>
<tr>
<td style="width:40px;text-align:center" nowrap>${x_index+1}</td>
<td style="width:120px" nowrap>
<input type="hidden" name="beans[${x_index}].ID" value="${(x.ID)!}"/>
<input type="text" name="beans[${x_index}].NAME" value="${(x.NAME)!}"/>
</td>
<td style="width:150px" nowrap>
<input type="text" name="beans[${x_index}].CODE" value="${(x.CODE)!}"/>
</td>
<td style="width:120px" nowrap>
<input type="text" name="beans[${x_index}].VALUE" value="${(x.VALUE)!}"/>
</td>
<td>
<input type="text" name="beans[${x_index}].REMARK" value="${(x.REMARK)!}" style="width:99%;"/>
</td>
</tr>
</#list>

复制代码

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