用Map params = new HashMap()将params 传入Map.Entry entry : params.entrySet()总是报类型转换异常的错误?
在线等..............................
用Map params = new HashMap()将params 传入Map.Entry entry : params.entrySet()总是报类型转换异常的错误?
在线等..............................
Map params = new HashMap();这个集合
StringBuilder sb = new StringBuilder();
if (params != null && !params.isEmpty())
{
for (Map.Entry<String, Object> entry : params.entrySet()) {
sb.append(entry.getKey()).append('=')
.append(URLEncoder.encode((String) entry.getValue(), "utf-8"))
.append('&');
}
sb.deleteCharAt(sb.length() - 1);
}
这样遍历,总是类型转换异常,大牛们救救命啊