jfinal用fastjson处理json的插件

FastJsonActiveRecordPlugin：

package com.jfinal.ext.plugin;

import javax.sql.DataSource;

import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializeConfig;
import com.alibaba.fastjson.serializer.SimpleDateFormatSerializer;
import com.jfinal.ext.plugin.fastjson.ModelDeserializer;
import com.jfinal.ext.plugin.fastjson.ModelSerializer;
import com.jfinal.ext.plugin.fastjson.RecordSerializer;
import com.jfinal.plugin.activerecord.ActiveRecordPlugin;
import com.jfinal.plugin.activerecord.Config;
import com.jfinal.plugin.activerecord.IDataSourceProvider;
import com.jfinal.plugin.activerecord.Model;
import com.jfinal.plugin.activerecord.Record;

/**
 * FastJson ActiveRecordPlugin
 *
 * @author Obama
 *
 */
public class FastJsonActiveRecordPlugin extends ActiveRecordPlugin {

    public FastJsonActiveRecordPlugin(String configName, IDataSourceProvider dataSourceProvider, int transactionLevel) {
        super(configName, dataSourceProvider, transactionLevel);
    }

    public FastJsonActiveRecordPlugin(String configName, IDataSourceProvider dataSourceProvider) {
        super(configName, dataSourceProvider);
    }

    public FastJsonActiveRecordPlugin(String configName, DataSource dataSource, int transactionLevel) {
        super(configName, dataSource, transactionLevel);
    }

    public FastJsonActiveRecordPlugin(String configName, DataSource dataSource) {
        super(configName, dataSource);
    }

    public FastJsonActiveRecordPlugin(IDataSourceProvider dataSourceProvider, int transactionLevel) {
        super(dataSourceProvider, transactionLevel);
    }

    public FastJsonActiveRecordPlugin(IDataSourceProvider dataSourceProvider) {
        super(dataSourceProvider);
    }

    public FastJsonActiveRecordPlugin(DataSource dataSource, int transactionLevel) {
        super(dataSource, transactionLevel);
    }

    public FastJsonActiveRecordPlugin(DataSource dataSource) {
        super(dataSource);
    }

    public FastJsonActiveRecordPlugin(Config config) {
        super(config);
    }

    @Override
    public ActiveRecordPlugin addMapping(String tableName, String primaryKey, Class<? extends Model<?>> modelClass) {
        _fastJsonInit(modelClass);
        return super.addMapping(tableName, primaryKey, modelClass);
    }

    @Override
    public ActiveRecordPlugin addMapping(String tableName, Class<? extends Model<?>> modelClass) {
        _fastJsonInit(modelClass);
        return super.addMapping(tableName, modelClass);
    }

    private void _fastJsonInit(Class<? extends Model<?>> modelClass) {
        if (modelClass == Model.class)
            return;
        // 序列化
        SerializeConfig.getGlobalInstance().put(modelClass, ModelSerializer.instance);
        // 反序列化
        ParserConfig.getGlobalInstance().putDeserializer(modelClass, ModelDeserializer.instance);
    }

    @Override
    public boolean start() {
        boolean bol = super.start();
        if (bol) {
            SerializeConfig.getGlobalInstance().put(Record.class, RecordSerializer.instance);
            // 时间格式
            SerializeConfig.getGlobalInstance().put(java.sql.Timestamp.class, new SimpleDateFormatSerializer("yyyy-MM-dd HH:mm:ss"));
        }
        return bol;
    }

}

JfinalSerializer：

package com.jfinal.ext.plugin.fastjson;

import java.io.IOException;
import java.lang.reflect.Type;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.FilterUtils;
import com.alibaba.fastjson.serializer.JSONSerializer;
import com.alibaba.fastjson.serializer.NameFilter;
import com.alibaba.fastjson.serializer.ObjectSerializer;
import com.alibaba.fastjson.serializer.PropertyFilter;
import com.alibaba.fastjson.serializer.PropertyPreFilter;
import com.alibaba.fastjson.serializer.SerialContext;
import com.alibaba.fastjson.serializer.SerializeWriter;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.serializer.ValueFilter;

/**
 * FastJson JfinalSerializer
 *
 * @author Obama
 *
 */
public abstract class JfinalSerializer implements ObjectSerializer {

    protected abstract Map<String, Object> getMap(Object object);

    @SuppressWarnings({ "rawtypes", "unchecked" })
    public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType) throws IOException {
        SerializeWriter out = serializer.getWriter();

        Map<String, Object> map = null;

        if (object == null || (map = this.getMap(object)) == null) {
            out.writeNull();
            return;
        }
        if (out.isEnabled(SerializerFeature.SortField)) {
            if ((!(map instanceof SortedMap)) && !(map instanceof LinkedHashMap)) {
                try {
                    map = new TreeMap(map);
                } catch (Exception ex) {
                    // skip
                }
            }
        }

        if (serializer.containsReference(object)) {
            serializer.writeReference(object);
            return;
        }

        SerialContext parent = serializer.getContext();
        serializer.setContext(parent, object, fieldName);
        try {
            out.write('{');

            serializer.incrementIndent();

            Class<?> preClazz = null;
            ObjectSerializer preWriter = null;

            boolean first = true;

            if (out.isEnabled(SerializerFeature.WriteClassName)) {
                out.writeFieldName(JSON.DEFAULT_TYPE_KEY);
                out.writeString(object.getClass().getName());
                first = false;
            }

            for (Map.Entry entry : map.entrySet()) {
                Object value = entry.getValue();

                Object entryKey = entry.getKey();

                {
                    List<PropertyPreFilter> preFilters = serializer.getPropertyPreFiltersDirect();
                    if (preFilters != null && preFilters.size() > 0) {
                        if (entryKey == null || entryKey instanceof String) {
                            if (!FilterUtils.applyName(serializer, object, (String) entryKey)) {
                                continue;
                            }
                        } else if (entryKey.getClass().isPrimitive() || entryKey instanceof Number) {
                            String strKey = JSON.toJSONString(entryKey);
                            if (!FilterUtils.applyName(serializer, object, strKey)) {
                                continue;
                            }
                        }
                    }
                }

                {
                    List<PropertyFilter> propertyFilters = serializer.getPropertyFiltersDirect();
                    if (propertyFilters != null && propertyFilters.size() > 0) {
                        if (entryKey == null || entryKey instanceof String) {
                            if (!FilterUtils.apply(serializer, object, (String) entryKey, value)) {
                                continue;
                            }
                        } else if (entryKey.getClass().isPrimitive() || entryKey instanceof Number) {
                            String strKey = JSON.toJSONString(entryKey);
                            if (!FilterUtils.apply(serializer, object, strKey, value)) {
                                continue;
                            }
                        }
                    }
                }

                {
                    List<NameFilter> nameFilters = serializer.getNameFiltersDirect();
                    if (nameFilters != null && nameFilters.size() > 0) {
                        if (entryKey == null || entryKey instanceof String) {
                            entryKey = FilterUtils.processKey(serializer, object, (String) entryKey, value);
                        } else if (entryKey.getClass().isPrimitive() || entryKey instanceof Number) {
                            String strKey = JSON.toJSONString(entryKey);
                            entryKey = FilterUtils.processKey(serializer, object, strKey, value);
                        }
                    }
                }

                {
                    List<ValueFilter> valueFilters = serializer.getValueFiltersDirect();
                    if (valueFilters != null && valueFilters.size() > 0) {
                        if (entryKey == null || entryKey instanceof String) {
                            value = FilterUtils.processValue(serializer, object, (String) entryKey, value);
                        } else if (entryKey.getClass().isPrimitive() || entryKey instanceof Number) {
                            String strKey = JSON.toJSONString(entryKey);
                            value = FilterUtils.processValue(serializer, object, strKey, value);
                        }
                    }
                }

                if (value == null) {
                    if (!serializer.isEnabled(SerializerFeature.WriteMapNullValue)) {
                        continue;
                    }
                }

                if (entryKey instanceof String) {
                    String key = (String) entryKey;

                    if (!first) {
                        out.write(',');
                    }

                    if (out.isEnabled(SerializerFeature.PrettyFormat)) {
                        serializer.println();
                    }
                    out.writeFieldName(key, true);
                } else {
                    if (!first) {
                        out.write(',');
                    }

                    if (out.isEnabled(SerializerFeature.BrowserCompatible) || out.isEnabled(SerializerFeature.WriteNonStringKeyAsString)) {
                        String strEntryKey = JSON.toJSONString(entryKey);
                        serializer.write(strEntryKey);
                    } else {
                        serializer.write(entryKey);
                    }

                    out.write(':');
                }

                first = false;

                if (value == null) {
                    out.writeNull();
                    continue;
                }
                Class<?> clazz = value.getClass();
                if (clazz == preClazz) {
                    preWriter.write(serializer, value, entryKey, null);
                } else {
                    preClazz = clazz;
                    preWriter = serializer.getObjectWriter(clazz);

                    preWriter.write(serializer, value, entryKey, null);
                }
            }
        } finally {
            serializer.setContext(parent);
        }

        serializer.decrementIdent();
        if (out.isEnabled(SerializerFeature.PrettyFormat) && map.size() > 0) {
            serializer.println();
        }
        out.write('}');
    }
}

ModelSerializer（支持model序列化）：

package com.jfinal.ext.plugin.fastjson;

import java.util.Map;

import com.jfinal.plugin.activerecord.Model;

/**
 * FastJson ModelSerializer
 *
 * @author Obama
 *
 */
public class ModelSerializer extends JfinalSerializer {
    public static ModelSerializer instance = new ModelSerializer();

    @Override
    protected Map<String, Object> getMap(Object object) {
        return com.jfinal.plugin.activerecord.CPI.getAttrs((Model<?>) object);
    }
}

RecordSerializer（支持record序列化）：

package com.jfinal.ext.plugin.fastjson;

import java.util.Map;

import com.jfinal.plugin.activerecord.Record;

/**
 * FastJson RecordSerializer
 *
 * @author Obama
 *
 */
public class RecordSerializer extends JfinalSerializer {
    public static RecordSerializer instance = new RecordSerializer();

    @Override
    protected Map<String, Object> getMap(Object object) {
        return ((Record) object).getColumns();
    }
}

JsonFeildDes：

package com.jfinal.ext.plugin.fastjson;

import java.lang.reflect.Field;

import com.alibaba.fastjson.annotation.JSONField;

/**
 * FastJson JsonFeildDes
 *
 * @author Obama
 *
 */
public class JsonFeildDes {
    private Field field;
    private JSONField jasonField;

    public JsonFeildDes(Field field, JSONField jasonField) {
        super();
        this.field = field;
        this.jasonField = jasonField;
    }

    public Field getField() {
        return field;
    }

    public void setField(Field field) {
        this.field = field;
    }

    public JSONField getJasonField() {
        return jasonField;
    }

    public void setJasonField(JSONField jasonField) {
        this.jasonField = jasonField;
    }

}

ModelDeserializer（支持model反序列化）：

package com.jfinal.ext.plugin.fastjson;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Map;

import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.annotation.JSONField;
import com.alibaba.fastjson.parser.DefaultJSONParser;
import com.alibaba.fastjson.parser.Feature;
import com.alibaba.fastjson.parser.JSONLexer;
import com.alibaba.fastjson.parser.JSONToken;
import com.alibaba.fastjson.parser.ParseContext;
import com.alibaba.fastjson.parser.deserializer.ObjectDeserializer;
import com.jfinal.plugin.activerecord.Model;
import com.jfinal.plugin.activerecord.Table;
import com.jfinal.plugin.activerecord.TableMapping;

/**
 * FastJson ModelDeserializer
 *
 * @author Obama
 *
 */
public class ModelDeserializer implements ObjectDeserializer {

    public final static ModelDeserializer instance = new ModelDeserializer();

    @SuppressWarnings("unchecked")
    public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
        final JSONLexer lexer = parser.getLexer();
        if (lexer.token() == JSONToken.NULL) {
            lexer.nextToken(JSONToken.COMMA);
            return null;
        }
        T model = null;
        Map<String, Object> map = null;
        ParseContext context = parser.getContext();
        Class<? extends Model<?>> clazz = null;
        Table table = null;
        Map<String, JsonFeildDes> jfd = null;
        try {
            clazz = (Class<? extends Model<?>>) type;
            table = TableMapping.me().getTable(clazz);
            jfd = new HashMap<String, JsonFeildDes>();
            _scanJsonAnnotation(clazz, jfd);

            model = (T) clazz.newInstance();
            map = com.jfinal.plugin.activerecord.CPI.getAttrs((Model<?>) model);
            parser.setContext(context, map, fieldName);
            deserialze(parser, fieldName, map, (Model<?>) model, jfd, table);
            return model;
        } catch (InstantiationException e) {
            throw new JSONException("init model exceptopn:" + e.getMessage());
        } catch (IllegalAccessException e) {
            throw new JSONException("init model exceptopn:" + e.getMessage());
        } catch (NumberFormatException e) {
            throw e;
        } finally {
            parser.setContext(context);
            clazz = null;
            table = null;
            jfd.clear();
        }
    }

    private void _scanJsonAnnotation(Class<? extends Model<?>> clazz, Map<String, JsonFeildDes> jfd) {
        for (Field f : clazz.getDeclaredFields()) {
            if (Modifier.isStatic(f.getModifiers())) {
                continue;
            }
            JSONField jf = f.getAnnotation(JSONField.class);
            if (jf != null && jf.name() != null && jf.name().trim().length() != 0) {
                jfd.put(jf.name().trim(), new JsonFeildDes(f, jf));
            }
        }
    }

    private <T> Map<String, Object> deserialze(DefaultJSONParser parser, Object fieldName, Map<String, Object> map, Model<?> model,
            Map<String, JsonFeildDes> jfd, Table table) throws NumberFormatException {
        JSONLexer lexer = parser.getLexer();

        if (lexer.token() != JSONToken.LBRACE) {
            throw new JSONException("syntax error, expect {, actual " + lexer.token());
        }
        ParseContext context = parser.getContext();
        try {
            for (;;) {
                lexer.skipWhitespace();
                char ch = lexer.getCurrent();
                if (parser.isEnabled(Feature.AllowArbitraryCommas)) {
                    while (ch == ',') {
                        lexer.next();
                        lexer.skipWhitespace();
                        ch = lexer.getCurrent();
                    }
                }
                String key;
                if (ch == '"') {
                    key = lexer.scanSymbol(parser.getSymbolTable(), '"');
                    lexer.skipWhitespace();
                    ch = lexer.getCurrent();
                    if (ch != ':') {
                        throw new JSONException("expect ':' at " + lexer.pos());
                    }
                } else if (ch == '}') {
                    lexer.next();
                    lexer.resetStringPosition();
                    lexer.nextToken(JSONToken.COMMA);
                    return map;
                } else if (ch == '\'') {
                    if (!parser.isEnabled(Feature.AllowSingleQuotes)) {
                        throw new JSONException("syntax error");
                    }

                    key = lexer.scanSymbol(parser.getSymbolTable(), '\'');
                    lexer.skipWhitespace();
                    ch = lexer.getCurrent();
                    if (ch != ':') {
                        throw new JSONException("expect ':' at " + lexer.pos());
                    }
                } else {
                    if (!parser.isEnabled(Feature.AllowUnQuotedFieldNames)) {
                        throw new JSONException("syntax error");
                    }

                    key = lexer.scanSymbolUnQuoted(parser.getSymbolTable());
                    lexer.skipWhitespace();
                    ch = lexer.getCurrent();
                    if (ch != ':') {
                        throw new JSONException("expect ':' at " + lexer.pos() + ", actual " + ch);
                    }
                }

                lexer.next();
                lexer.skipWhitespace();
                ch = lexer.getCurrent();

                lexer.resetStringPosition();

                JsonFeildDes jsonfdes = null;
                Object value;
                lexer.nextToken();

                int c = -1;
                if (lexer.token() == JSONToken.NULL) {
                    value = null;
                    lexer.nextToken();
                } else {
                    Type valueType = Object.class;
                    if ((jsonfdes = jfd.get(key)) != null) {
                        if (!jsonfdes.getJasonField().deserialize())
                            continue;
                        valueType = jsonfdes.getField().getGenericType();
                        key = jsonfdes.getField().getName();
                        jsonfdes = null;
                    }
                    if (table.hasColumnLabel(key)) {
                        c = 1;
                        valueType = table.getColumnType(key);
                    }
                    value = parser.parseObject(valueType);
                    valueType = null;
                }
                if (c == 1) {
                    model.set(key, value);
                } else {
                    model.put(key, value);
                }

                parser.checkMapResolve(map, key);
                parser.setContext(context, value, key);

                final int tok = lexer.token();
                if (tok == JSONToken.EOF || tok == JSONToken.RBRACKET) {
                    return map;
                }
                if (tok == JSONToken.RBRACE) {
                    lexer.nextToken();
                    return map;
                }
            }
        } finally {
            parser.setContext(context);
        }
    }

    public int getFastMatchToken() {
        return JSONToken.LBRACE;
    }
}

FastJsonRender：

package com.jfinal.ext.render;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

import com.alibaba.fastjson.JSON;
import com.jfinal.render.Render;
import com.jfinal.render.RenderException;

/**
 * FastJson JsonRender
 *
 * @author Obama
 *
 */
public class FastJsonRender extends Render {

    private static final long serialVersionUID = 3606364198859021837L;

    /**
     * http://zh.wikipedia.org/zh/MIME 在wiki中查到:
     * 尚未被接受为正式数据类型的subtype，可以使用x-开始的独立名称（例如application/x-gzip） 所以以下可能要改成
     * application/x-json
     *
     * 通过使用firefox测试,struts2-json-plugin返回的是 application/json, 所以暂不改为
     * application/x-json 1: 官方的 MIME type为application/json, 见
     * http://en.wikipedia.org/wiki/MIME_type 2: IE 不支持 application/json, 在 ajax
     * 上传文件完成后返回 json时 IE 提示下载文件
     */
    private static final String contentType = "application/json;charset=" + getEncoding();
    private static final String contentTypeForIE = "text/html;charset=" + getEncoding();
    private boolean forIE = false;

    public FastJsonRender forIE() {
        forIE = true;
        return this;
    }

    private String jsonText;
    private String[] attrs;

    public FastJsonRender() {

    }

    @SuppressWarnings("serial")
    public FastJsonRender(final String key, final Object value) {
        if (key == null)
            throw new IllegalArgumentException("The parameter key can not be null.");
        this.jsonText = JSON.toJSONString(new HashMap<String, Object>() {
            {
                put(key, value);
            }
        });
    }

    public FastJsonRender(String[] attrs) {
        if (attrs == null)
            throw new IllegalArgumentException("The parameter attrs can not be null.");
        this.attrs = attrs;
    }

    public FastJsonRender(String jsonText) {
        if (jsonText == null)
            throw new IllegalArgumentException("The parameter jsonString can not be null.");
        this.jsonText = jsonText;
    }

    public FastJsonRender(Object object) {
        if (object == null)
            throw new IllegalArgumentException("The parameter object can not be null.");
        this.jsonText = JSON.toJSONString(object);
    }

    public void render() {
        if (jsonText == null)
            buildJsonText();

        PrintWriter writer = null;
        try {
            response.setHeader("Pragma", "no-cache"); // HTTP/1.0 caches might
                                                        // not implement
                                                        // Cache-Control and
                                                        // might only implement
                                                        // Pragma: no-cache
            response.setHeader("Cache-Control", "no-cache");
            response.setDateHeader("Expires", 0);

            response.setContentType(forIE ? contentTypeForIE : contentType);
            writer = response.getWriter();
            writer.write(jsonText);
            writer.flush();
        } catch (IOException e) {
            throw new RenderException(e);
        } finally {
            if (writer != null)
                writer.close();
        }
    }

    @SuppressWarnings({ "rawtypes", "unchecked" })
    private void buildJsonText() {
        Map map = new HashMap();
        if (attrs != null) {
            for (String key : attrs)
                map.put(key, request.getAttribute(key));
        } else {
            Enumeration<String> attrs = request.getAttributeNames();
            while (attrs.hasMoreElements()) {
                String key = attrs.nextElement();
                Object value = request.getAttribute(key);
                map.put(key, value);
            }
        }
        this.jsonText = JSON.toJSONString(map);
    }
}

整合进jfinal很简单，只需要把ActiveRecordPlugin替换为FastJsonActiveRecordPlugin即可使用！