<分区>
当前输出如下: { "1": "abc", “2”:“定义”， “3”:“志”，
预期: { "1": "abc", “2”:“定义”， “3”:“志” }//没有最后一个逗号
代码:
BufferedReader br = new BufferedReader(reader);
String nextLine = "";
StringBuilder sb = new StringBuilder();
sb.append("{ \n");
while ((nextLine = br.readLine()) != null) {
sb.append(...);
sb.append(",");
sb.append("\n");
}
sb.append("}");
最佳答案
你可以简单地做 -
String nextLine = "";
StringBuilder sb = new StringBuilder();
sb.append("{ \n");
while ((nextLine = br.readLine()) != null) {
sb.append(...);
sb.append(",");
sb.append("\n");
}
//avoid IndexOutOfBoundsException
int lastIndexOfComma = sb.lastIndexOf(",");
if (lastIndexOfComma != -1)
sb.deleteCharAt(lastIndexOfComma);
sb.append("}");
关于java - 在 JAVA 7 中消除 StringBuilder 对象(在循环中运行)的最后一个逗号的方法？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30521945/