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@@ -9,29 +9,42 @@ import java.io.StringReader;
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/**
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* JSON解析器,用于将JSON字符串解析为JSONObject或者JSONArray
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- *
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+ *
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* @author from JSON.org
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*/
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public class JSONTokener {
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private long character;
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- /** 是否结尾 End of stream */
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+ /**
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+ * 是否结尾 End of stream
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+ */
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private boolean eof;
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- /** 在Reader的位置(解析到第几个字符) */
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+ /**
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+ * 在Reader的位置(解析到第几个字符)
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+ */
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private long index;
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- /** 当前所在行 */
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+ /**
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+ * 当前所在行
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+ */
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private long line;
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- /** 前一个字符 */
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+ /**
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+ * 前一个字符
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+ */
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private char previous;
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- /** 是否使用前一个字符 */
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+ /**
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+ * 是否使用前一个字符
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+ */
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private boolean usePrevious;
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- /** 源 */
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+ /**
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+ * 源
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+ */
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private Reader reader;
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// ------------------------------------------------------------------------------------ Constructor start
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+
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/**
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* 从Reader中构建
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- *
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+ *
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* @param reader Reader
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*/
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public JSONTokener(Reader reader) {
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@@ -46,7 +59,7 @@ public class JSONTokener {
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/**
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* 从InputStream中构建
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- *
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+ *
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* @param inputStream InputStream
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*/
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public JSONTokener(InputStream inputStream) throws JSONException {
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@@ -55,7 +68,7 @@ public class JSONTokener {
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/**
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* 从字符串中构建
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- *
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+ *
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* @param s JSON字符串
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*/
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public JSONTokener(String s) {
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@@ -85,7 +98,7 @@ public class JSONTokener {
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/**
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* 源字符串是否有更多的字符
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- *
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+ *
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* @return 如果未达到结尾返回true,否则false
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*/
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public boolean more() throws JSONException {
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@@ -99,7 +112,7 @@ public class JSONTokener {
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/**
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* 获得源字符串中的下一个字符
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- *
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+ *
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* @return 下一个字符, or 0 if past the end of the source string.
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* @throws JSONException JSON异常,包装IO异常
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*/
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@@ -136,7 +149,7 @@ public class JSONTokener {
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/**
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* 读取下一个字符,并比对是否和指定字符匹配
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- *
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+ *
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* @param c 被匹配的字符
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* @return The character 匹配到的字符
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* @throws JSONException 如果不匹配抛出此异常
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@@ -175,9 +188,9 @@ public class JSONTokener {
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/**
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* 获得下一个字符,跳过空白符
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- *
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- * @throws JSONException 获得下一个字符时抛出的异常
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+ *
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* @return 获得的字符,0表示没有更多的字符
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+ * @throws JSONException 获得下一个字符时抛出的异常
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*/
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public char nextClean() throws JSONException {
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char c;
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@@ -192,7 +205,7 @@ public class JSONTokener {
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/**
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* 返回当前位置到指定引号前的所有字符,反斜杠的转义符也会被处理。<br>
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* 标准的JSON是不允许使用单引号包含字符串的,但是此实现允许。
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- *
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+ *
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* @param quote 字符引号, 包括 <code>"</code>(双引号) 或 <code>'</code>(单引号)。
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* @return 截止到引号前的字符串
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* @throws JSONException 出现无结束的字符串时抛出此异常
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@@ -200,49 +213,49 @@ public class JSONTokener {
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public String nextString(char quote) throws JSONException {
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char c;
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StringBuilder sb = new StringBuilder();
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- for (;;) {
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+ while (true) {
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c = this.next();
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switch (c) {
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- case 0:
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- case '\n':
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- case '\r':
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- throw this.syntaxError("Unterminated string");
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- case '\\':// 转义符
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- c = this.next();
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- switch (c) {
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- case 'b':
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- sb.append('\b');
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- break;
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- case 't':
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- sb.append('\t');
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- break;
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- case 'n':
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- sb.append('\n');
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- break;
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- case 'f':
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- sb.append('\f');
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- break;
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- case 'r':
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- sb.append('\r');
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- break;
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- case 'u':// Unicode符
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- sb.append((char) Integer.parseInt(this.next(4), 16));
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- break;
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- case '"':
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- case '\'':
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- case '\\':
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- case '/':
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- sb.append(c);
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+ case 0:
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+ case '\n':
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+ case '\r':
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+ throw this.syntaxError("Unterminated string");
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+ case '\\':// 转义符
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+ c = this.next();
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+ switch (c) {
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+ case 'b':
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+ sb.append('\b');
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+ break;
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+ case 't':
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+ sb.append('\t');
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+ break;
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+ case 'n':
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+ sb.append('\n');
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+ break;
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+ case 'f':
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+ sb.append('\f');
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+ break;
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+ case 'r':
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+ sb.append('\r');
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+ break;
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+ case 'u':// Unicode符
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+ sb.append((char) Integer.parseInt(this.next(4), 16));
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+ break;
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+ case '"':
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+ case '\'':
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+ case '\\':
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+ case '/':
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+ sb.append(c);
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+ break;
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+ default:
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+ throw this.syntaxError("Illegal escape.");
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+ }
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break;
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default:
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- throw this.syntaxError("Illegal escape.");
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- }
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- break;
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- default:
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- if (c == quote) {
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- return sb.toString();
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- }
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- sb.append(c);
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+ if (c == quote) {
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+ return sb.toString();
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+ }
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+ sb.append(c);
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}
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}
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}
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@@ -250,13 +263,13 @@ public class JSONTokener {
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/**
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* Get the text up but not including the specified character or the end of line, whichever comes first. <br>
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* 获得从当前位置直到分隔符(不包括分隔符)或行尾的的所有字符。
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- *
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+ *
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* @param delimiter 分隔符
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* @return 字符串
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*/
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public String nextTo(char delimiter) throws JSONException {
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StringBuilder sb = new StringBuilder();
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- for (;;) {
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+ for (; ; ) {
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char c = this.next();
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if (c == delimiter || c == 0 || c == '\n' || c == '\r') {
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if (c != 0) {
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@@ -270,14 +283,14 @@ public class JSONTokener {
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/**
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* Get the text up but not including one of the specified delimiter characters or the end of line, whichever comes first.
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- *
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+ *
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* @param delimiters A set of delimiter characters.
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* @return A string, trimmed.
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*/
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public String nextTo(String delimiters) throws JSONException {
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char c;
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StringBuilder sb = new StringBuilder();
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- for (;;) {
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+ for (; ; ) {
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c = this.next();
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if (delimiters.indexOf(c) >= 0 || c == 0 || c == '\n' || c == '\r') {
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if (c != 0) {
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@@ -291,29 +304,28 @@ public class JSONTokener {
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/**
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* 获得下一个值,值类型可以是Boolean, Double, Integer, JSONArray, JSONObject, Long, or String, or the JSONObject.NULL
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- *
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- * @throws JSONException 语法错误
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*
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* @return Boolean, Double, Integer, JSONArray, JSONObject, Long, or String, or the JSONObject.NULL
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+ * @throws JSONException 语法错误
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*/
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public Object nextValue() throws JSONException {
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char c = this.nextClean();
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String string;
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switch (c) {
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- case '"':
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- case '\'':
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- return this.nextString(c);
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- case '{':
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- this.back();
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- return new JSONObject(this);
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- case '[':
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- this.back();
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- return new JSONArray(this);
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+ case '"':
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+ case '\'':
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+ return this.nextString(c);
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+ case '{':
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+ this.back();
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+ return new JSONObject(this);
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+ case '[':
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+ this.back();
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+ return new JSONArray(this);
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}
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/*
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- * Handle unquoted text. This could be the values true, false, or null, or it can be a number.
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+ * Handle unquoted text. This could be the values true, false, or null, or it can be a number.
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* An implementation (such as this one) is allowed to also accept non-standard forms. Accumulate
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* characters until we reach the end of the text or a formatting character.
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*/
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@@ -334,7 +346,7 @@ public class JSONTokener {
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/**
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* Skip characters until the next character is the requested character. If the requested character is not found, no characters are skipped. 在遇到指定字符前,跳过其它字符。如果字符未找到,则不跳过任何字符。
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- *
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+ *
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* @param to 需要定位的字符
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* @return 定位的字符,如果字符未找到返回0
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*/
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@@ -375,7 +387,7 @@ public class JSONTokener {
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/**
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* 转为 {@link JSONArray}
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- *
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+ *
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* @return {@link JSONArray}
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*/
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public JSONArray toJSONArray() {
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@@ -394,16 +406,16 @@ public class JSONTokener {
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jsonArray.add(this.nextValue());
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}
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switch (this.nextClean()) {
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- case ',':
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- if (this.nextClean() == ']') {
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+ case ',':
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+ if (this.nextClean() == ']') {
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+ return jsonArray;
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+ }
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+ this.back();
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+ break;
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+ case ']':
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return jsonArray;
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- }
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- this.back();
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- break;
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- case ']':
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- return jsonArray;
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- default:
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- throw this.syntaxError("Expected a ',' or ']'");
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+ default:
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+ throw this.syntaxError("Expected a ',' or ']'");
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}
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}
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}
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