按不超过指定长度截取字符串，汉字不能截半

 

//A.java

import java.util.ArrayList;

public class A {

	public static void main(String[] args) {
		String str = "he吉llo林yu大r学i";
		exec(str,5);
	}
	
	public static void exec(String str,int N){
		ArrayList<String> result = new ArrayList<String>();
		int i = 0; // 字符串定位
		int left = N;
		int count = 0; // 当前已划分出来的块数

		while (i < str.length()) {
			if (left - (String.valueOf(str.charAt(i))).getBytes().length >= 0) {
				if (result.size() == 0) {
					result.add(String.valueOf(str.charAt(i)));
				} else {
					result.set(count, ((String) result.get(count))+(str.charAt(i)));
				}
				left -= (String.valueOf(str.charAt(i))).getBytes().length;
				i++;
			} else {
				count++;
				result.add("");
				left = N;
			}
		}

		for (int a = 0; a < result.size(); a++) {
			System.out.println(result.get(a));
		}
	}
}

 

 

运行结果：

 

he吉l
lo林y
u大r
学i