spring boot controller trim string 屬性

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找了兩天，終於找到這個功能

需求描述

controller 中 接受一個對象，對象裏面有String 屬性

需要清空String 屬性前後空格

 

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer;
import com.fasterxml.jackson.databind.module.SimpleModule;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;

import java.io.IOException;

@Component
public class StringTrimModule extends SimpleModule {

    public StringTrimModule() {
        addDeserializer(String.class, new StdScalarDeserializer<String>(String.class) {
            @Override
            public String deserialize(JsonParser jsonParser, DeserializationContext ctx) throws IOException {
                String value = jsonParser.getValueAsString();
                if (StringUtils.isEmpty(value))
                    return value;
                return value.trim();
            }
        });
    }
}

 

找了兩天，看了無數源碼，頭大、頭大

參考

https://znotes.in/spring/spring-trim-string.html