Android String Escape escapeString(String value)

Description

escape String

License

Apache License

Declaration

public static String escapeString(String value) 

Method Source Code

//package com.java2s;
/*/*from ww w  .j av a2s. c o  m*/
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    public static String escapeString(String value) {
        int len = value.length();
        StringBuilder sb = new StringBuilder(len * 3 / 2);

        for (int i = 0; i < len; i++) {
            char c = value.charAt(i);

            if ((c >= ' ') && (c < 0x7f)) {
                if ((c == '\'') || (c == '\"') || (c == '\\')) {
                    sb.append('\\');
                }
                sb.append(c);
                continue;
            } else if (c <= 0x7f) {
                switch (c) {
                case '\n':
                    sb.append("\\n");
                    continue;
                case '\r':
                    sb.append("\\r");
                    continue;
                case '\t':
                    sb.append("\\t");
                    continue;
                }
            }

            sb.append("\\u");
            sb.append(Character.forDigit(c >> 12, 16));
            sb.append(Character.forDigit((c >> 8) & 0x0f, 16));
            sb.append(Character.forDigit((c >> 4) & 0x0f, 16));
            sb.append(Character.forDigit(c & 0x0f, 16));
        }

        return sb.toString();
    }
}

Related

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3. unescapeCString(String s)
4. unescapeMySQLString(String s)