如何把List集合中的对象放在table中，table列可以是多列（java）

可以用JSTL标准标签库和迭代标签(c:forEach)显示，

如

List list=查询的方法；

然后用request对象传过去，再在界面上这样写：

<table>

<c:forEach id="aa" name="list">

<tr><td>${aa.对象}</td><td>${aa.对象}</</td></tr>

</table>

</c:forEach>

这样就可以显示所以数据。

ajax本身是无法取得后台的list对象的~只能取基本类型的值~

可以这样试试：

1、首先下面这几个包要存在：

commons-beanutils.jar

commons-collections.jar

commons-lang.jar

ezmorph-1.0.6.jar

json-lib-2.2.3-jdk15.jar

2、然后改后台代码，转换为基本类型的值，传到前台：

String json = JSONArray.fromObject(list).toString()

out.print(json)

3、jsp页面上的js：

$.getJSON("test.action",function(data)

{

for(var i = 0i <data.lengthi++)

{

var id = data[i].id

var name = data[i].name

}

})

using System

using System.Collections.Generic

using System.Linq

using System.Text

using System.Data

using System.Collections

using System.Reflection

namespace DatableToList

{

class ConvertHelper<T>where T : new()

{

/// <summary>

/// 利用反射和泛型

/// </summary>

/// <param name="<a href="https://www.baidu.com/s?wd=dt&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmWb4PA7Bm1TknycYnHTY0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3Erj04P1D3rjDzP10sPHT3PjRz" target="_blank" class="baidu-highlight">dt</a>"></param>

/// <returns></returns>

public static List<T>ConvertToList(DataTable <a href="https://www.baidu.com/s?wd=dt&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmWb4PA7Bm1TknycYnHTY0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3Erj04P1D3rjDzP10sPHT3PjRz" target="_blank" class="baidu-highlight">dt</a>)

{

// 定义集合

List<T><a href="https://www.baidu.com/s?wd=ts&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmWb4PA7Bm1TknycYnHTY0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3Erj04P1D3rjDzP10sPHT3PjRz" target="_blank" class="baidu-highlight">ts</a>= new List<T>()

// 获得此模型的类型

Type type = typeof(T)

//定义一个临时变量

string tempName = string.Empty

//遍历DataTable中所有的数据行

foreach (DataRow dr in <a href="https://www.baidu.com/s?wd=dt&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmWb4PA7Bm1TknycYnHTY0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3Erj04P1D3rjDzP10sPHT3PjRz" target="_blank" class="baidu-highlight">dt</a>.Rows)

{

T t = new T()

// 获得此模型的公共属性

PropertyInfo[] propertys = t.GetType().GetProperties()

//遍历该对象的所有属性

foreach (PropertyInfo pi in propertys)

{

tempName = pi.Name//将属性名称赋值给临时变量

//检查DataTable是否包含此列（列名==对象的属性名）

if (dt.Columns.Contains(tempName))

{

// 判断此属性是否有Setter

if (!pi.CanWrite) continue//该属性不可写，直接跳出

//取值

object value = dr[tempName]

//如果非空，则赋给对象的属性

if (value != DBNull.Value)

pi.SetValue(t, value, null)

}

}

//对象添加到泛型集合中

<a href="https://www.baidu.com/s?wd=ts&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmWb4PA7Bm1TknycYnHTY0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3Erj04P1D3rjDzP10sPHT3PjRz" target="_blank" class="baidu-highlight">ts</a>.Add(t)

}

return <a href="https://www.baidu.com/s?wd=ts&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmWb4PA7Bm1TknycYnHTY0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3Erj04P1D3rjDzP10sPHT3PjRz" target="_blank" class="baidu-highlight">ts</a>

}

}

}

---