淘宝fastjson最有效率json转换

/* * Copyright 1999-2101 Alibaba Group. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.alibaba.fastjson.parser; import static com.alibaba.fastjson.parser.JSONLexer.EOI; import static com.alibaba.fastjson.parser.JSONToken.EOF; import static com.alibaba.fastjson.parser.JSONToken.ERROR; import static com.alibaba.fastjson.parser.JSONToken.FALSE; import static com.alibaba.fastjson.parser.JSONToken.LBRACE; import static com.alibaba.fastjson.parser.JSONToken.LBRACKET; import static com.alibaba.fastjson.parser.JSONToken.LITERAL_FLOAT; import static com.alibaba.fastjson.parser.JSONToken.LITERAL_INT; import static com.alibaba.fastjson.parser.JSONToken.LITERAL_STRING; import static com.alibaba.fastjson.parser.JSONToken.NEW; import static com.alibaba.fastjson.parser.JSONToken.NULL; import static com.alibaba.fastjson.parser.JSONToken.RBRACKET; import static com.alibaba.fastjson.parser.JSONToken.SET; import static com.alibaba.fastjson.parser.JSONToken.TREE_SET; import static com.alibaba.fastjson.parser.JSONToken.TRUE; import java.io.Closeable; import java.lang.reflect.Method; import java.lang.reflect.ParameterizedType; import java.lang.reflect.Type; import java.lang.reflect.TypeVariable; import java.lang.reflect.WildcardType; import java.math.BigDecimal; import java.math.BigInteger; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Collection; import java.util.Date; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; import java.util.TreeSet; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONArray; import com.alibaba.fastjson.JSONException; import com.alibaba.fastjson.JSONObject; import com.alibaba.fastjson.parser.deserializer.FieldDeserializer; import com.alibaba.fastjson.parser.deserializer.IntegerDeserializer; import com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer; import com.alibaba.fastjson.parser.deserializer.ListResolveFieldDeserializer; import com.alibaba.fastjson.parser.deserializer.LongDeserializer; import com.alibaba.fastjson.parser.deserializer.MapResolveFieldDeserializer; import com.alibaba.fastjson.parser.deserializer.ObjectDeserializer; import com.alibaba.fastjson.parser.deserializer.StringDeserializer; import com.alibaba.fastjson.util.TypeUtils; /** * @author wenshao<[email protected]> */ public class DefaultJSONParser extends AbstractJSONParser implements Closeable { protected final Object input; protected final SymbolTable symbolTable; protected ParserConfig config; private final static Set<Class<?>> primitiveClasses = new HashSet<Class<?>>(); private String dateFormatPattern = JSON.DEFFAULT_DATE_FORMAT; private DateFormat dateFormat; protected final JSONLexer lexer; protected ParseContext context; private ParseContext[] contextArray = new ParseContext[8]; private int contextArrayIndex = 0; private final List<ResolveTask> resolveTaskList = new ArrayList<ResolveTask>(); public final static int NONE = 0; public final static int NeedToResolve = 1; public final static int TypeNameRedirect = 2; private int resolveStatus = NONE; static { primitiveClasses.add(boolean.class); primitiveClasses.add(byte.class); primitiveClasses.add(short.class); primitiveClasses.add(int.class); primitiveClasses.add(long.class); primitiveClasses.add(float.class); primitiveClasses.add(double.class); primitiveClasses.add(Boolean.class); primitiveClasses.add(Byte.class); primitiveClasses.add(Short.class); primitiveClasses.add(Integer.class); primitiveClasses.add(Long.class); primitiveClasses.add(Float.class); primitiveClasses.add(Double.class); primitiveClasses.add(BigInteger.class); primitiveClasses.add(BigDecimal.class); primitiveClasses.add(String.class); } public String getDateFomartPattern() { return dateFormatPattern; } public DateFormat getDateFormat() { if (dateFormat == null) { dateFormat = new SimpleDateFormat(dateFormatPattern); } return dateFormat; } public void setDateFormat(String dateFormat) { this.dateFormatPattern = dateFormat; this.dateFormat = null; } public void setDateFomrat(DateFormat dateFormat) { this.dateFormat = dateFormat; } public DefaultJSONParser(String input){ this(input, ParserConfig.getGlobalInstance(), JSON.DEFAULT_PARSER_FEATURE); } public DefaultJSONParser(final String input, final ParserConfig config){ this(input, new JSONScanner(input, JSON.DEFAULT_PARSER_FEATURE), config); } public DefaultJSONParser(final String input, final ParserConfig config, int features){ this(input, new JSONScanner(input, features), config); } public DefaultJSONParser(final char[] input, int length, final ParserConfig config, int features){ this(input, new JSONScanner(input, length, features), config); } public DefaultJSONParser(final JSONLexer lexer){ this(lexer, ParserConfig.getGlobalInstance()); } public DefaultJSONParser(final JSONLexer lexer, final ParserConfig config){ this(null, lexer, config); } public DefaultJSONParser(final Object input, final JSONLexer lexer, final ParserConfig config){ this.lexer = lexer; this.input = input; this.config = config; this.symbolTable = config.getSymbolTable(); lexer.nextToken(JSONToken.LBRACE); // prime the pump } public SymbolTable getSymbolTable() { return symbolTable; } public String getInput() { if (input instanceof char[]) { return new String((char[]) input); } return input.toString(); } @SuppressWarnings({ "unchecked", "rawtypes" }) public final Object parseObject(final Map object, Object fieldName) { final JSONLexer lexer = this.lexer; if (lexer.token() != JSONToken.LBRACE && lexer.token() != JSONToken.COMMA) { throw new JSONException("syntax error, expect {, actual " + lexer.tokenName()); } ParseContext context = this.getContext(); try { boolean setContextFlag = false; for (;;) { lexer.skipWhitespace(); char ch = lexer.getCurrent(); if (isEnabled(Feature.AllowArbitraryCommas)) { while (ch == ',') { lexer.next(); lexer.skipWhitespace(); ch = lexer.getCurrent(); } } boolean isObjectKey = false; Object key; if (ch == '"') { key = lexer.scanSymbol(symbolTable, '"'); lexer.skipWhitespace(); ch = lexer.getCurrent(); if (