List<Map<String, Object>> 转String

将List<Map<String, Object>>转换为String有多种方法，以下是两种常见的方法：

方法一：使用数组
可以通过遍历List<Map<String, Object>>并将其转换为两个数组，然后使用Arrays.toString()方法将数组转换为字符串。示例代码如下：

List<Map<String, Object>> activityStaList = activityService.getStatusByDeptId(deptId);
String[] actNameArr = new String[activityStaList.size()];
String[] staArr = new String[activityStaList.size()];
for(int i = 0; i < activityStaList.size(); i++){
    actNameArr[i] = (String)activityStaList.get(i).get("activityName");
    staArr[i] = (String)activityStaList.get(i).get("activityStatus");
}
String actNames = Arrays.toString(actNameArr);
String actStatuss = Arrays.toString(staArr);

方法二：使用StringBuilder
可以使用StringBuilder将List<Map<String, Object>>转换为字符串。示例代码如下：

List<Map<String, Object>> activityStaList = activityService.getStatusByDeptId(deptId);
StringBuilder actNamesBuilder = new StringBuilder();
StringBuilder actStatussBuilder = new StringBuilder();
for(int i = 0; i < activityStaList.size(); i++){
    String actName = String.valueOf(activityStaList.get(i).get("activityName"));
    String actStatus = String.valueOf(activityStaList.get(i).get("activityStatus"));
    if(i != (activityStaList.size()-1)){
        actNamesBuilder.append(actName).append(",");
        actStatussBuilder.append(actStatus).append(",");
    }else{
        actNamesBuilder.append(actName);
        actStatussBuilder.append(actStatus);
    }
}
String actNames = actNamesBuilder.toString();
String actStatuss = actStatussBuilder.toString();