commons-lang3 ToStringBuilder方法中文Unicode編碼解決

使用commons-lang3.jar來輸出toString時，jar版本 3.8，3.9，3.10輸出中文被unicode編碼了

查詢源碼對比下發現下面方法有區別

org.apache.commons.lang3.builder.ToStringStyle.appendValueAsString()

3.7版本

       /**
         * Appends the given String in parenthesis to the given StringBuffer.
         *
         * @param buffer the StringBuffer to append the value to.
         * @param value the value to append.
         */
        private void appendValueAsString(final StringBuffer buffer, final String value) {
            buffer.append('"').append(value).append('"');
        }

3.10版本

       /**
         * Appends the given String enclosed in double-quotes to the given StringBuffer.
         *
         * @param buffer the StringBuffer to append the value to.
         * @param value the value to append.
         */
        private void appendValueAsString(final StringBuffer buffer, final String value) {
            buffer.append('"').append(StringEscapeUtils.escapeJson(value)).append('"');
        }

3.10中的appendValueAsString()在拼接時對value進行了特殊處理，調用了下面函數

org.apache.commons.lang3.StringEscapeUtils.escapeJson()

org.apache.commons.lang3.text.translate.UnicodeEscaper.translate()

可以通過繼承ToStringStyle，重寫appendValueAsString()方法來修改

package com.example.test;

import org.apache.commons.lang3.StringEscapeUtils;
import org.apache.commons.lang3.builder.ToStringStyle;

public class JsonTest extends ToStringStyle
{
    public static final ToStringStyle JSON_STYLE_C = new JsonStringStyle();

    private static final class JsonStringStyle extends ToStringStyle {

        private static final long serialVersionUID = 1L;

        private static final String FIELD_NAME_QUOTE = "\"";

        /**
         * <p>
         * Constructor.
         * </p>
         *
         * <p>
         * Use the static constant rather than instantiating.
         * </p>
         */
        JsonStringStyle() {
            super();

            this.setUseClassName(false);
            this.setUseIdentityHashCode(false);

            this.setContentStart("{");
            this.setContentEnd("}");

            this.setArrayStart("[");
            this.setArrayEnd("]");

            this.setFieldSeparator(",");
            this.setFieldNameValueSeparator(":");

            this.setNullText("null");

            this.setSummaryObjectStartText("\"<");
            this.setSummaryObjectEndText(">\"");

            this.setSizeStartText("\"<size=");
            this.setSizeEndText(">\"");
        }

        @Override
        public void append(final StringBuffer buffer, final String fieldName,
                           final Object[] array, final Boolean fullDetail) {

            if (fieldName == null) {
                throw new UnsupportedOperationException(
                        "Field names are mandatory when using JsonToStringStyle");
            }
            if (!isFullDetail(fullDetail)) {
                throw new UnsupportedOperationException(
                        "FullDetail must be true when using JsonToStringStyle");
            }

            super.append(buffer, fieldName, array, fullDetail);
        }

        @Override
        public void append(final StringBuffer buffer, final String fieldName, final long[] array,
                           final Boolean fullDetail) {

            if (fieldName == null) {
                throw new UnsupportedOperationException(
                        "Field names are mandatory when using JsonToStringStyle");
            }
            if (!isFullDetail(fullDetail)) {
                throw new UnsupportedOperationException(
                        "FullDetail must be true when using JsonToStringStyle");
            }

            super.append(buffer, fieldName, array, fullDetail);
        }

        @Override
        public void append(final StringBuffer buffer, final String fieldName, final int[] array,
                           final Boolean fullDetail) {

            if (fieldName == null) {
                throw new UnsupportedOperationException(
                        "Field names are mandatory when using JsonToStringStyle");
            }
            if (!isFullDetail(fullDetail)) {
                throw new UnsupportedOperationException(
                        "FullDetail must be true when using JsonToStringStyle");
            }

            super.append(buffer, fieldName, array, fullDetail);
        }

        @Override
        public void append(final StringBuffer buffer, final String fieldName,
                           final short[] array, final Boolean fullDetail) {

            if (fieldName == null) {
                throw new UnsupportedOperationException(
                        "Field names are mandatory when using JsonToStringStyle");
            }
            if (!isFullDetail(fullDetail)) {
                throw new UnsupportedOperationException(
                        "FullDetail must be true when using JsonToStringStyle");
            }

            super.append(buffer, fieldName, array, fullDetail);
        }

        @Override
        public void append(final StringBuffer buffer, final String fieldName, final byte[] array,
                           final Boolean fullDetail) {

            if (fieldName == null) {
                throw new UnsupportedOperationException(
                        "Field names are mandatory when using JsonToStringStyle");
            }
            if (!isFullDetail(fullDetail)) {
                throw new UnsupportedOperationException(
                        "FullDetail must be true when using JsonToStringStyle");
            }

            super.append(buffer, fieldName, array, fullDetail);
        }

        @Override
        public void append(final StringBuffer buffer, final String fieldName, final char[] array,
                           final Boolean fullDetail) {

            if (fieldName == null) {
                throw new UnsupportedOperationException(
                        "Field names are mandatory when using JsonToStringStyle");
            }
            if (!isFullDetail(fullDetail)) {
                throw new UnsupportedOperationException(
                        "FullDetail must be true when using JsonToStringStyle");
            }

            super.append(buffer, fieldName, array, fullDetail);
        }

        @Override
        public void append(final StringBuffer buffer, final String fieldName,
                           final double[] array, final Boolean fullDetail) {

            if (fieldName == null) {
                throw new UnsupportedOperationException(
                        "Field names are mandatory when using JsonToStringStyle");
            }
            if (!isFullDetail(fullDetail)) {
                throw new UnsupportedOperationException(
                        "FullDetail must be true when using JsonToStringStyle");
            }

            super.append(buffer, fieldName, array, fullDetail);
        }

        @Override
        public void append(final StringBuffer buffer, final String fieldName,
                           final float[] array, final Boolean fullDetail) {

            if (fieldName == null) {
                throw new UnsupportedOperationException(
                        "Field names are mandatory when using JsonToStringStyle");
            }
            if (!isFullDetail(fullDetail)) {
                throw new UnsupportedOperationException(
                        "FullDetail must be true when using JsonToStringStyle");
            }

            super.append(buffer, fieldName, array, fullDetail);
        }

        @Override
        public void append(final StringBuffer buffer, final String fieldName,
                           final boolean[] array, final Boolean fullDetail) {

            if (fieldName == null) {
                throw new UnsupportedOperationException(
                        "Field names are mandatory when using JsonToStringStyle");
            }
            if (!isFullDetail(fullDetail)) {
                throw new UnsupportedOperationException(
                        "FullDetail must be true when using JsonToStringStyle");
            }

            super.append(buffer, fieldName, array, fullDetail);
        }

        @Override
        public void append(final StringBuffer buffer, final String fieldName, final Object value,
                           final Boolean fullDetail) {

            if (fieldName == null) {
                throw new UnsupportedOperationException(
                        "Field names are mandatory when using JsonToStringStyle");
            }
            if (!isFullDetail(fullDetail)) {
                throw new UnsupportedOperationException(
                        "FullDetail must be true when using JsonToStringStyle");
            }

            super.append(buffer, fieldName, value, fullDetail);
        }

        @Override
        protected void appendDetail(final StringBuffer buffer, final String fieldName, final char value) {
            appendValueAsString(buffer, String.valueOf(value));
        }

        @Override
        protected void appendDetail(final StringBuffer buffer, final String fieldName, final Object value) {

            if (value == null) {
                appendNullText(buffer, fieldName);
                return;
            }

            if (value instanceof String || value instanceof Character) {
                appendValueAsString(buffer, value.toString());
                return;
            }

            if (value instanceof Number || value instanceof Boolean) {
                buffer.append(value);
                return;
            }

            final String valueAsString = value.toString();
            if (isJsonObject(valueAsString) || isJsonArray(valueAsString)) {
                buffer.append(value);
                return;
            }

            appendDetail(buffer, fieldName, valueAsString);
        }

        private boolean isJsonArray(final String valueAsString) {
            return valueAsString.startsWith(getArrayStart())
                    && valueAsString.endsWith(getArrayEnd());
        }

        private boolean isJsonObject(final String valueAsString) {
            return valueAsString.startsWith(getContentStart())
                    && valueAsString.endsWith(getContentEnd());
        }

        /**
         * Appends the given String enclosed in double-quotes to the given StringBuffer.
         *
         * @param buffer the StringBuffer to append the value to.
         * @param value the value to append.
         */
        private void appendValueAsString(final StringBuffer buffer, final String value) {
            buffer.append('"').append(value).append('"');
        }

        @Override
        protected void appendFieldStart(final StringBuffer buffer, final String fieldName) {

            if (fieldName == null) {
                throw new UnsupportedOperationException(
                        "Field names are mandatory when using JsonToStringStyle");
            }

            super.appendFieldStart(buffer, FIELD_NAME_QUOTE + StringEscapeUtils.escapeJson(fieldName)
                    + FIELD_NAME_QUOTE);
        }

        /**
         * <p>
         * Ensure {@code Singleton} after serialization.
         * </p>
         *
         * @return the singleton
         */
        private Object readResolve() {
            return JSON_STYLE;
        }

    }
}

調用的時候

    @Override
    public String toString()
    {
        return ToStringBuilder.reflectionToString(this, JsonTest.JSON_STYLE_C);
    }

輸出結果

{"age":"666","name":"張三丰"}