druid Backslash is missing

e7arh2l6  于 2022-10-21  发布在  Druid
关注(0)|答案(1)|浏览(169)

Druid Version: 1.1.10
Expect: 1/Upload\TIM\\Picture.jpg
Actual: 1/UploadTIM\Picture.jpg
I want to capture the update field key-value as Map<String, String>.
When the value contain \ , The Backslash is missing. What's should I do?

Chinese: 我想获取更新字段的原始key-value。但是当存在 \ 时,会出现丢失的情况。请问是我调用错误了吗?

public static void main(String[] args) {
    // UPDATE my_table SET content='1/Upload\TIM\\Picture.jpg' WHERE id=13
    String sql = "UPDATE my_table SET content='1/Upload\\TIM\\\\Picture.jpg' WHERE id=13";
    String tableName = null;
    Map<String, String> fields = new HashMap<>();
    String where = null;

    SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, JdbcConstants.MYSQL);
    List<SQLObject> sqlObjects = parser.parseStatement().getChildren();
    for (SQLObject sqlObject : sqlObjects) {
        // 2.1. get Table Name(获取表名)
        if(SQLExprTableSource.class.isAssignableFrom(sqlObject.getClass())) {
            SQLExprTableSource tableSource = (SQLExprTableSource) sqlObject;
            tableName = tableSource.getName().getSimpleName();
            continue;
        }
        // 2.2. get field as Map(获取字段, 转为 key-value的形式)
        if(SQLUpdateSetItem.class.isAssignableFrom(sqlObject.getClass())) {
            SQLUpdateSetItem update = (SQLUpdateSetItem) sqlObject;

            String column = update.getColumn().toString();
            // clear ` (清除 字符串 的 起始终止反引号)
            column = StringUtils.removeStart(column, "`");
            column = StringUtils.removeEnd(column, "`");
            String value = update.getValue().toString();
            // clear ' (清除 字符串 的 起始终止单引号)
            value  = StringUtils.removeStart(value, "'");
            value  = StringUtils.removeEnd(value, "'");

            fields.put(column, value);
            continue;
        }
        // 2.3. get where condition (获取where 子句)
        if(SQLBinaryOpExpr.class.isAssignableFrom(sqlObject.getClass())) {
            SQLBinaryOpExpr expr = (SQLBinaryOpExpr) sqlObject;
            where = expr.toString();
            continue;
        }
    }

    // UPDATE my_table SET content='1/Upload\TIM\\Picture.jpg' WHERE id=13
    System.out.println(tableName);
    System.out.println(JSONObject.toJSONString(fields));
    System.out.println(fields.get("content")); // 1/UploadTIM\Picture.jpg
    System.out.println(where);
}

I Debug and find L1087 do something?
Chinese: debug了一下,发现L1087进行了转义操作?

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