说明:用到的fastjson版本是:fastjson-1.2.17

实体类:

package com.test;

import java.util.Date;

public class User {
    private Integer id;
    private String name;
    private Date createDate;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Date getCreateDate() {
        return createDate;
    }

    public void setCreateDate(Date createDate) {
        this.createDate = createDate;
    }

    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", createDate=" + createDate + "]";
    }

}

调用代码

public static void main(String[] args) throws ParseException {
    String json = "[{\"id\":1000,\"name\":\"张三\",\"createDate\":\"Nov 24, 2016 2:54:26 PM\"},{\"id\":1000,\"name\":\"张三\",\"createDate\":\"Nov 24, 2016 2:54:26 PM\"}]";
    List<User> users = JSONArray.parseArray(json, User.class);
    System.out.println(users);
}

报错信息类似如下:

Exception in thread "main" java.lang.NumberFormatException: For input string: "Nov 24, 2016 2:54:26 PM"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Long.parseLong(Unknown Source)
at java.lang.Long.parseLong(Unknown Source)
at com.alibaba.fastjson.serializer.DateCodec.cast(DateCodec.java:202)
at
com.alibaba.fastjson.parser.deserializer.AbstractDateDeserializer.deserialze(AbstractDateDeserializer.java:150)
at com.alibaba.fastjson.parser.deserializer.DefaultFieldDeserializer.parseField(DefaultFieldDeserializer.java:66)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.parseField(JavaBeanDeserializer.java:722)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:568)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:187)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:183)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseArray(DefaultJSONParser.java:708)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseArray(DefaultJSONParser.java:644)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseArray(DefaultJSONParser.java:639)
at com.alibaba.fastjson.JSON.parseArray(JSON.java:503)
at com.test.Main.main(Main.java:39)

解决方法如下(找到日期对应的源码解析类):

package com.alibaba.fastjson.parser.deserializer;

import java.lang.reflect.Type;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Locale;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.parser.DefaultJSONParser;
import com.alibaba.fastjson.parser.Feature;
import com.alibaba.fastjson.parser.JSONLexer;
import com.alibaba.fastjson.parser.JSONScanner;
import com.alibaba.fastjson.parser.JSONToken;
import com.alibaba.fastjson.util.TypeUtils;

public abstract class AbstractDateDeserializer extends ContextObjectDeserializer implements ObjectDeserializer {

    public <T> T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName) {
        return deserialze(parser, clazz, fieldName, null, 0);
    }

    @Override
    @SuppressWarnings("unchecked")
    public <T> T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName, String format, int features) {
        JSONLexer lexer = parser.lexer;

        Object val;
        if (lexer.token() == JSONToken.LITERAL_INT) {
            val = lexer.longValue();
            lexer.nextToken(JSONToken.COMMA);
        } else if (lexer.token() == JSONToken.LITERAL_STRING) {
            String strVal = lexer.stringVal();

            if (format != null) {
                SimpleDateFormat simpleDateFormat = null;
                try {
                    simpleDateFormat = new SimpleDateFormat(format);
                } catch (IllegalArgumentException ex) {
                    if (format.equals("yyyy-MM-ddTHH:mm:ss.SSS")) {
                        format = "yyyy-MM-dd'T'HH:mm:ss.SSS";
                        simpleDateFormat = new SimpleDateFormat(format);
                    } else  if (format.equals("yyyy-MM-ddTHH:mm:ss")) {
                        format = "yyyy-MM-dd'T'HH:mm:ss";
                        simpleDateFormat = new SimpleDateFormat(format);
                    }
                }

                try {
                    val = simpleDateFormat.parse(strVal);
                } catch (ParseException ex) {
                    if (format.equals("yyyy-MM-dd'T'HH:mm:ss.SSS") //
                            && strVal.length() == 19) {
                        try {
                            val = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss").parse(strVal);
                        } catch (ParseException ex2) {
                            // skip
                            val = null;
                        }
                    } else {
                        **//====这里添加日期转换代码=====**
                        **//====这里添加日期转换代码=====**
                        **//====这里添加日期转换代码=====**
                        **//====这里添加日期转换代码=====**
                        try {
                            SimpleDateFormat ssddff = new SimpleDateFormat("MMM dd, yyyy hh:mm:ss aa", Locale.ENGLISH);
                            val = ssddff.parse(strVal);
                        } catch (ParseException e) {
                             // skip
                            val = null;
                        }
                    }
                }
            } else {
                val = null;
            }

            if (val == null) {
                val = strVal;
                lexer.nextToken(JSONToken.COMMA);

                if (lexer.isEnabled(Feature.AllowISO8601DateFormat)) {
                    JSONScanner iso8601Lexer = new JSONScanner(strVal);
                    if (iso8601Lexer.scanISO8601DateIfMatch()) {
                        val = iso8601Lexer.getCalendar().getTime();
                    }
                    iso8601Lexer.close();
                }
            }
        } else if (lexer.token() == JSONToken.NULL) {
            lexer.nextToken();
            val = null;
        } else if (lexer.token() == JSONToken.LBRACE) {
            lexer.nextToken();

            String key;
            if (lexer.token() == JSONToken.LITERAL_STRING) {
                key = lexer.stringVal();

                if (JSON.DEFAULT_TYPE_KEY.equals(key)) {
                    lexer.nextToken();
                    parser.accept(JSONToken.COLON);

                    String typeName = lexer.stringVal();
                    Class<?> type = TypeUtils.loadClass(typeName, parser.getConfig().getDefaultClassLoader());
                    if (type != null) {
                        clazz = type;
                    }

                    parser.accept(JSONToken.LITERAL_STRING);
                    parser.accept(JSONToken.COMMA);
                }

                lexer.nextTokenWithColon(JSONToken.LITERAL_INT);
            } else {
                throw new JSONException("syntax error");
            }

            long timeMillis;
            if (lexer.token() == JSONToken.LITERAL_INT) {
                timeMillis = lexer.longValue();
                lexer.nextToken();
            } else {
                throw new JSONException("syntax error : " + lexer.tokenName());
            }

            val = timeMillis;

            parser.accept(JSONToken.RBRACE);
        } else if (parser.getResolveStatus() == DefaultJSONParser.TypeNameRedirect) {
            parser.setResolveStatus(DefaultJSONParser.NONE);
            parser.accept(JSONToken.COMMA);

            if (lexer.token() == JSONToken.LITERAL_STRING) {
                if (!"val".equals(lexer.stringVal())) {
                    throw new JSONException("syntax error");
                }
                lexer.nextToken();
            } else {
                throw new JSONException("syntax error");
            }

            parser.accept(JSONToken.COLON);

            val = parser.parse();

            parser.accept(JSONToken.RBRACE);
        } else {
            val = parser.parse();
        }

        return (T) cast(parser, clazz, fieldName, val);
    }

    protected abstract <T> T cast(DefaultJSONParser parser, Type clazz, Object fieldName, Object value);
}

这样改还是有问题,还是会报数之前的错,还需要在实体类上加注解@JSONField(format=”yyyy-MM-dd”),修改后代码如下:

package com.test;

import java.util.Date;

import com.alibaba.fastjson.annotation.JSONField;

public class User {
    private Integer id;

    private String name;
    @JSONField(format="yyyy-MM-dd")
    private Date createDate;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Date getCreateDate() {
        return createDate;
    }

    public void setCreateDate(Date createDate) {
        this.createDate = createDate;
    }

    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", createDate=" + createDate + "]";
    }


}

然后再运行代码就可以正常通过了

具体如何改源码,可以通过maven将源码下载下来,自己新建一个工程将源码导入到新建的工程中,直接修改即可。(报错无需理会,直接忽略即可)
修改后的代码打成一个jar,放到自己的项目中即可正常使用。

项目截图:

这里写图片描述

源码位置:

这里写图片描述

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