關於 fastjson 中的 SimplePropertyPreFilter

版本：fastjson-1.1.26

package com.alibaba.fastjson.serializer;

import java.util.HashSet;
import java.util.Set;

public class SimplePropertyPreFilter implements PropertyPreFilter {

    private final Class<?>    clazz;
    private final Set<String> includes = new HashSet<String>();
    private final Set<String> excludes = new HashSet<String>();

    public SimplePropertyPreFilter(String... properties){
        this(null,properties);
    }

    public SimplePropertyPreFilter(Class<?> clazz,String... properties){
        super();
        this.clazz = clazz;
        for (String item : properties) {
            if (item != null) {
                this.includes.add(item);
            }
        }
    }

    public Class<?> getClazz() {
        return clazz;
    }

    public Set<String> getIncludes() {
        return includes;
    }

    public Set<String> getExcludes() {
        return excludes;
    }

    public boolean apply(JSONSerializer serializer,Object source,String name) {
        if (source == null) {
            return true;
        }

        if (clazz != null && !clazz.isInstance(source)) {
            return true;
        }

        if (this.excludes.contains(name)) {
            return false;
        }

        if (includes.size() == 0 || includes.contains(name)) {
            return true;
        }

        return false;
    }

}

於是得動手修改，我另外寫了個類：

public class SimplePropertyPreFilter implements PropertyPreFilter {

    private final Class<?>    clazz;
    private Set<String> includes = new HashSet<String>();
    private Set<String> excludes = new HashSet<String>();

    public SimplePropertyPreFilter(String... properties){
        this(null,String... properties){
        super();
        this.clazz = clazz;
        for (String item : properties) {
            if (item != null) {
                this.includes.add(item);
            }
        }
    }

    public Class<?> getClazz() {
        return clazz;
    }

    public boolean apply(JSONSerializer serializer,String name) {
        if (source == null) {
            return true;
        }

        if (clazz != null && !clazz.isInstance(source)) {
            return true;
        }

        if (this.excludes.contains(name)) {
            return false;
        }

        if (includes.size() == 0 || includes.contains(name)) {
            return true;
        }

        return false;
    }

    public Set<String> getIncludes() {
        return includes;
    }

    public Set<String> getExcludes() {
        return excludes;
    }
    
	public void setIncludes(Set<String> includes) {
		this.includes = includes;
	}

	public void setExcludes(Set<String> excludes) {
		this.excludes = excludes;
	}

}

簡單做了個測試：

public static String bean(Object object){
		Set<String> excludes = new HashSet<String>();
		excludes.add("name");
		SimplePropertyPreFilter spp = new SimplePropertyPreFilter();
		spp.setExcludes(excludes);
		return JSON.toJSONString(object,spp);
	}

（编辑：李大同）

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