输出json字符串转义

import org.apache.commons.lang3.text.translate.CharSequenceTranslator;
import org.apache.commons.lang3.text.translate.LookupTranslator;
import org.springframework.http.HttpOutputMessage;
import org.springframework.http.converter.StringHttpMessageConverter;

import java.io.IOException;
import java.nio.charset.Charset;

public class MyStringHttpMessageConverter extends StringHttpMessageConverter {

    public static final CharSequenceTranslator ESCAPE =
            new LookupTranslator(
                    new String[][] {
                            {"\"", "\\\""},
                            {"\\", "\\\\"},
                    });

    public MyStringHttpMessageConverter() {
        super();
    }

    public MyStringHttpMessageConverter(Charset defaultCharset) {
        super(defaultCharset);
    }

    @Override
    protected void writeInternal(String str, HttpOutputMessage outputMessage) throws IOException {
        //输出json字符串双引号转义
        String target = ESCAPE.translate(str);
        super.writeInternal(target, outputMessage);
    }

}