java - 字符串替换屏蔽 json 文件的更有效方法 (java)

Question

我有一些代码来屏蔽 json 文件中的值。但我觉得应该有一种更有效的方法来做到这一点。

这是我当前的代码:

private static final String STRING_REPLACEMENT = "$1 \"String\" $4";
private static final String FLOAT_REPLACEMENT = "$1 \"float\" $4";
private static final String INT_REPLACEMENT = "$1 \"Integer\" $4";
private static final String BOOL_REPLACEMENT = "$1 \"Boolean\" $4";

以及实际的屏蔽代码:

out = out.replaceAll("(\"\\w+\"\\s?:)\\s?\"((\\\\\"|[^\"])*\")", "$1 \"String\"");
out = out.replaceAll("(\"\\w+\"\\s?:)\\s?(\\d+\\.\\d+)", "$1 \"float\"");
out = out.replaceAll("(\"\\w+\"\\s?:)\\s?(\\d+)", "$1 \"Integer\"");
out = out.replaceAll("(\"\\w+\"\\s?:)\\s?(true|false)", "$1 \"Boolean\"");

out = out.replaceAll("(\\[\\s?)\"((\\\\\"|[^\"])*\")(\\s?,)", STRING_REPLACEMENT);
out = out.replaceAll("(,\\s?)\"((\\\\\"|[^\"])*\")(\\s?,)", STRING_REPLACEMENT);
out = out.replaceAll("(,\\s?)\"((\\\\\"|[^\"])*\")(\\s?\\])", STRING_REPLACEMENT);

out = out.replaceAll("(\\[\\s?)((\\d)+\\.\\d+)(\\s?,)", FLOAT_REPLACEMENT);
out = out.replaceAll("(,\\s?)((\\d)+\\.\\d+)(\\s?,)", FLOAT_REPLACEMENT);
out = out.replaceAll("(,\\s?)((\\d)+\\.\\d+)(\\s?\\])", FLOAT_REPLACEMENT);

out = out.replaceAll("(\\[\\s?)((\\d)+)(\\s?,)", INT_REPLACEMENT);
out = out.replaceAll("(,\\s?)((\\d)+)(\\s?,)", INT_REPLACEMENT);
out = out.replaceAll("(,\\s?)((\\d)+)(\\s?\\])", INT_REPLACEMENT);

out = out.replaceAll("(\\[\\s?)((true|false))(\\s?,)", BOOL_REPLACEMENT);
out = out.replaceAll("(,\\s?)((true|false))(\\s?,)", BOOL_REPLACEMENT);
out = out.replaceAll("(,\\s?)((true|false))(\\s?\\])", BOOL_REPLACEMENT);

有人对如何改进这个有任何建议吗？我知道我可以对正则表达式进行一些分组，但我担心这会影响 much 的可读性。我注意到，如果我将 3 条正则表达式行合并为一行，并添加更多行？因为它并不总是以正确的方式找到它，因此屏蔽会失败。

Answer 1

您可以使用正则表达式/替换创建 HashMap 并迭代以应用您的replaceAll

例如

import java.util.HashMap;
import java.util.Map;

public class Test {

    private static final String STRING_REPLACEMENT = "$1 \"String\" $4";
    private static final String FLOAT_REPLACEMENT = "$1 \"float\" $4";
    private static final String INT_REPLACEMENT = "$1 \"Integer\" $4";
    private static final String BOOL_REPLACEMENT = "$1 \"Boolean\" $4";
    private static final Map<String,String> patterns;
    static {
        patterns = new HashMap<>();
        patterns.put("(\"\\w+\"\\s?:)\\s?\"((\\\\\"|[^\"])*\")", "$1 \"String\"");
        patterns.put("(\"\\w+\"\\s?:)\\s?(\\d+\\.\\d+)", "$1 \"float\"");
        patterns.put("(\"\\w+\"\\s?:)\\s?(\\d+)", "$1 \"Integer\"");
        patterns.put("(\"\\w+\"\\s?:)\\s?(true|false)", "$1 \"Boolean\"");
        patterns.put("(\\[\\s?)\"((\\\\\"|[^\"])*\")(\\s?,)", STRING_REPLACEMENT);
        patterns.put("(,\\s?)\"((\\\\\"|[^\"])*\")(\\s?,)", STRING_REPLACEMENT);
        patterns.put("(,\\s?)\"((\\\\\"|[^\"])*\")(\\s?\\])", STRING_REPLACEMENT);
        patterns.put("(\\[\\s?)((\\d)+\\.\\d+)(\\s?,)", FLOAT_REPLACEMENT);
        patterns.put("(,\\s?)((\\d)+\\.\\d+)(\\s?,)", FLOAT_REPLACEMENT);
        patterns.put("(,\\s?)((\\d)+\\.\\d+)(\\s?\\])", FLOAT_REPLACEMENT);
        patterns.put("(\\[\\s?)((\\d)+)(\\s?,)", INT_REPLACEMENT);
        patterns.put("(,\\s?)((\\d)+)(\\s?,)", INT_REPLACEMENT);
        patterns.put("(,\\s?)((\\d)+)(\\s?\\])", INT_REPLACEMENT);
        patterns.put("(\\[\\s?)((true|false))(\\s?,)", BOOL_REPLACEMENT);
        patterns.put("(,\\s?)((true|false))(\\s?,)", BOOL_REPLACEMENT);
        patterns.put("(,\\s?)((true|false))(\\s?\\])", BOOL_REPLACEMENT);
    }
    public void test() {
        String out="your string";
        for(Map.Entry<String, String> pattern :patterns.entrySet()){
            out = out.replaceAll(pattern.getKey(), pattern.getValue());
        }
    }
}

但是，最好反序列化、更新值并使用 api 重新序列化您的 json