Android 字符串的替换，截取，拆分，拼接

1 去除字符串中的 [ ] , " ", 逗号替换成 & 符号

   public static String ReplaceString(List<String> info) {
        String infoJson = JSONObject.toJSONString(info);
        String replace = infoJson.replace("]", "").replace("[", "").replace(",", "&").replace("\"", "");
        return replace;
    }

2 字符拆分取任意部分

    public static String SplitString(String info, int num) {
        String[] temp = null;
        temp = info.split(",");
        return temp[num];
    }

3 取字符串前 i 个字符

    public static String InterceptString(String info, int i) {
        String substring = info.substring(0, i);
        return substring;
    }

4 取字符索引 i 之后的字符

    public static String DeleString(String info, int i) {
        String substring = info.substring(i);
        return substring;
    }

5 从右边开始取 i 个字符

    public static String RightString(String info, int i) {
        String substring = info.substring(info.length() - i);
        return substring;
    }

6 从右边开始去掉 i 个字符

   public static String RightdeleString(String info, int i) {
        String substring = info.substring(0, info.length() - i);
        return substring;
    }

7 字符取索引 i 到 索引 n 之间的字符 （不包含 n ）

    public static String RepinterString(String info, int i, int n) {
        String substring = info.substring(i, n);
        return substring;
    }

8 获取指定字符之后的字符

    public static String AfterString(String info, String appoint) {
        String substring = info.substring(info.indexOf(appoint));
        return substring;
    }

9 获取从第 i 位开始，截取第一次遇到 “.” 的字符串

    public static String AftenumString(String info, int i) {
        String substring = info.substring(i, info.indexOf(".", i));
        return substring;
    }

10 字符串自定义拼接

    public static String AppendString(Item info) {
        StringBuffer strBuffer = new StringBuffer();
        strBuffer.append("仓库: " + info.getStoreShelf().getWarehouse() + "\n");
        strBuffer.append("货架: " + info.getStoreShelf().getShelf() + "\n");
        strBuffer.append("架层: " + info.getStoreShelf().getLayer() + "\n");
        strBuffer.append("分区: " + info.getStoreShelf().getSection() + "\n");
        return strBuffer.toString();
    }

最后贴上完整工具类,以便使用

public class ReplaceUtils {

    //字符替换
    public static String ReplaceString(List<String> info) {
        String infoJson = JSONObject.toJSONString(info);
        String replace = infoJson.replace("]", "").replace("[", "").replace(",", "&").replace("\"", "");
        return replace;
    }

    //字符拆分取任意部分
    public static String SplitString(String info, int num) {
        String[] temp = null;
        temp = info.split(",");
        return temp[num];
    }

    //取字符串前 i 个字符
    public static String InterceptString(String info, int i) {
        String substring = info.substring(0, i);
        return substring;
    }

    //取字符索引 i 之后的字符
    public static String DeleString(String info, int i) {
        String substring = info.substring(i);
        return substring;
    }

    //从右边开始取 i 个字符
    public static String RightString(String info, int i) {
        String substring = info.substring(info.length() - i);
        return substring;
    }

    //从右边开始去掉 i 个字符
    public static String RightdeleString(String info, int i) {
        String substring = info.substring(0, info.length() - i);
        return substring;
    }

    //字符取索引 i 到 索引 n 之间的字符 （不包含 n ）
    public static String RepinterString(String info, int i, int n) {
        String substring = info.substring(i, n);
        return substring;
    }

    //获取指定字符之后的字符
    public static String AfterString(String info, String appoint) {
        String substring = info.substring(info.indexOf(appoint));
        return substring;
    }

    //获取从第 i 位开始，截取第一次遇到 “.” 的字符串
    public static String AftenumString(String info, int i) {
        String substring = info.substring(i, info.indexOf(".", i));
        return substring;
    }

    //字符串自定义拼接
    public static String AppendString(Item info) {
        StringBuffer strBuffer = new StringBuffer();
        strBuffer.append("仓库: " + info.getStoreShelf().getWarehouse() + "\n");
        strBuffer.append("货架: " + info.getStoreShelf().getShelf() + "\n");
        strBuffer.append("架层: " + info.getStoreShelf().getLayer() + "\n");
        strBuffer.append("分区: " + info.getStoreShelf().getSection() + "\n");
        return strBuffer.toString();
    }
}