StringUtils

功能：

• toString 读取InputStream 中的数据流并转为String

源码：

package com.dotions.utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
 * @Description String toolkit
 * 
 * @author Dotions 2016年7月26日 下午3:29:06
 */
public class StringUtils {

    public static String toString(InputStream input) throws IOException {
        if (input == null) {
            return null;
        }

        BufferedReader reader = new BufferedReader(new InputStreamReader(input, CharsetName.UTF_8));
        StringBuilder builder = new StringBuilder();
        String str = null;

        while ((str = reader.readLine()) != null) {
            builder.append(str);
        }
        return builder.toString();
    }

    /**
     * Charset
     */
    @SuppressWarnings("unused")
    private static interface CharsetName {
        public String UTF_8 = "UTF-8";
        public String GBK = "GBK";
        public String ISO8859_1 = "ISO8859-1";
    }
}