commons-lang3 ToStringBuilder方法中文Unicode编码解决

- 日理万妓 2023-02-12 11:19 7阅读 0赞

使用commons-lang3.jar来输出toString时，jar版本 3.8，3.9，3.10输出中文被unicode编码了

查询源码对比下发现下面方法有区别

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()在拼接时对value进行了特殊处理，调用了下面函数

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

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

可以通过继承ToStringStyle，重写appendValueAsString()方法来修改

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 = "\"";
 
 /**
 * 
 * Constructor.
 * 
 *
 * 
 * Use the static constant rather than instantiating.
 * 
 */
 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);
 }
 
 /**
 * 
 * Ensure {@code Singleton} after serialization.
 * 
 *
 * @return the singleton
 */
 private Object readResolve() {
 return JSON_STYLE;
 }
 
 }
 }

调用的时候

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

输出结果

{"age":"666","name":"张三丰"}