2025年map转json字符串再转对象（map转为json对象）

package com.hoo.test;

import java.lang.reflect.InvocationTargetException;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Date;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Set;

import net.sf.json.JSON;

import net.sf.json.JSONArray;

import net.sf.json.JSONFunction;

import net.sf.json.JSONObject;

import net.sf.json.JSONSerializer;

import net.sf.json.JsonConfig;

import net.sf.json.processors.JsonValueProcessor;

import net.sf.json.util.PropertyFilter;

import net.sf.json.xml.XMLSerializer;

import org.apache.commons.beanutils.PropertyUtils;

import org.junit.After;

import org.junit.Before;

import org.junit.Test;

import com.hoo.entity.Birthday;

import com.hoo.entity.Student;

/**

* function: 用json-lib转换java对象到JSON字符串

* 读取json字符串到java对象，序列化jsonObject到xml json-lib-version: json-lib-2.3-jdk15.jar

* 依赖包: commons-beanutils.jar commons-collections-3.2.jar ezmorph-1.0.3.jar

* commons-lang.jar commons-logging.jar

* @author hoojo

* @createDate Nov 28, 2010 2:28:39 PM

* @file JsonlibTest.java

* @package com.hoo.test

* @project WebHttpUtils

* @blog http://blog.csdn.net/IBM_hoojo

* @email hoojo_@126.com

* @version 1.0

@SuppressWarnings( { "deprecation", "unchecked" })

public class JsonlibTest {

private JSONArray jsonArray = null;

private JSONObject jsonObject = null;

private Student bean = null;

@Before

public void init() {

jsonArray = new JSONArray();

jsonObject = new JSONObject();

bean = new Student();

bean.setAddress("address");

bean.setEmail("email");

bean.setId(1);

bean.setName("haha");

Birthday day = new Birthday();

day.setBirthday("2010-11-22");

bean.setBirthday(day);

}

@After

public void destory() {

jsonArray = null;

jsonObject = null;

bean = null;

System.gc();

}

public final void fail(String string) {

System.out.println(string);

}

public final void failRed(String string) {

System.err.println(string);

}

* =========================Java Object >>>> JSON String

* ===========================

/**

* function:转Java Bean对象到JSON

* @author hoojo

* @createDate Nov 28, 2010 2:35:54 PM

@Test

public void testWriteEntity2JSON() {

fail("==============Java Bean >>> JSON Object==================");

fail(JSONObject.fromObject(bean).toString());

fail("==============Java Bean >>> JSON Array==================");

fail(JSONArray.fromObject(bean).toString());// array会在最外层套上[]

fail("==============Java Bean >>> JSON Object ==================");

fail(JSONSerializer.toJSON(bean).toString());

fail("========================JsonConfig========================");

JsonConfig jsonConfig = new JsonConfig();

jsonConfig.registerJsonValueProcessor(Birthday.class,

new JsonValueProcessor() {

public Object processArrayValue(Object value,

JsonConfig jsonConfig) {

if (value == null) {

return new Date();

}

return value;

}

public Object processObjectValue(String key, Object value,

JsonConfig jsonConfig) {

fail("key:" + key);

return value + "##修改过的日期";

}

});

jsonObject = JSONObject.fromObject(bean, jsonConfig);

fail(jsonObject.toString());

Student student = (Student) JSONObject

.toBean(jsonObject, Student.class);

fail(jsonObject.getString("birthday"));

fail(student.toString());

fail("#####################JsonPropertyFilter############################");

jsonConfig.setJsonPropertyFilter(new PropertyFilter() {

public boolean apply(Object source, String name, Object value) {

fail(source + "%%%" + name + "--" + value);

// 忽略birthday属性

if (value != null

&& Birthday.class.isAssignableFrom(value.getClass())) {

return true;

}

return false;

}

});

fail(JSONObject.fromObject(bean, jsonConfig).toString());

fail("#################JavaPropertyFilter##################");

jsonConfig.setRootClass(Student.class);

jsonConfig.setJavaPropertyFilter(new PropertyFilter() {

public boolean apply(Object source, String name, Object value) {

fail(name + "@" + value + "#" + source);

if ("id".equals(name) || "email".equals(name)) {

value = name + "@@";

return true;

}

return false;

}

});

// jsonObject = JSONObject.fromObject(bean, jsonConfig);

// student = (Student) JSONObject.toBean(jsonObject, Student.class);

// fail(student.toString());

student = (Student) JSONObject.toBean(jsonObject, jsonConfig);

fail("Student:" + student.toString());

}

/**

* function:转换Java List集合到JSON

* @author hoojo

* @createDate Nov 28, 2010 2:36:15 PM

@Test

public void testWriteList2JSON() {

fail("==============Java List >>> JSON Array==================");

List<Student> stu = new ArrayList<Student>();

stu.add(bean);

bean.setName("jack");

stu.add(bean);

fail(JSONArray.fromObject(stu).toString());

fail(JSONSerializer.toJSON(stu).toString());

}

/**

* function:转Java Map对象到JSON

* @author hoojo

* @createDate Nov 28, 2010 2:37:35 PM

@Test

public void testWriteMap2JSON() {

Map<String, Object> map = new HashMap<String, Object>();

map.put("A", bean);

bean.setName("jack");

map.put("B", bean);

map.put("name", "json");

map.put("bool", Boolean.TRUE);

map.put("int", new Integer(1));

map.put("arr", new String[] { "a", "b" });

map.put("func", "function(i){ return this.arr[i]; }");

fail("==============Java Map >>> JSON Object==================");

fail(JSONObject.fromObject(map).toString());

fail("==============Java Map >>> JSON Array ==================");

fail(JSONArray.fromObject(map).toString());

fail("==============Java Map >>> JSON Object==================");

fail(JSONSerializer.toJSON(map).toString());

}

/**

* function: 转换更多数组类型到JSON

* @author hoojo

* @createDate Nov 28, 2010 2:39:19 PM

@Test

public void testWriteObject2JSON() {

String[] sa = { "a", "b", "c" };

fail("==============Java StringArray >>> JSON Array ==================");

fail(JSONArray.fromObject(sa).toString());

fail(JSONSerializer.toJSON(sa).toString());

fail("==============Java boolean Array >>> JSON Array ==================");

boolean[] bo = { true, false, true };

fail(JSONArray.fromObject(bo).toString());

fail(JSONSerializer.toJSON(bo).toString());

Object[] o = { 1, "a", true, 'A', sa, bo };

fail("==============Java Object Array >>> JSON Array ==================");

fail(JSONArray.fromObject(o).toString());

fail(JSONSerializer.toJSON(o).toString());

fail("==============Java String >>> JSON ==================");

fail(JSONArray.fromObject("['json','is','easy']").toString());

fail(JSONObject.fromObject("{'json':'is easy'}").toString());

fail(JSONSerializer.toJSON("['json','is','easy']").toString());

fail("==============Java JSONObject >>> JSON ==================");

jsonObject = new JSONObject().element("string", "JSON").element(

"integer", "1").element("double", "2.0").element("boolean",

"true");

fail(JSONSerializer.toJSON(jsonObject).toString());

fail("==============Java JSONArray >>> JSON ==================");

jsonArray = new JSONArray().element("JSON").element("1").element("2.0")

.element("true");

fail(JSONSerializer.toJSON(jsonArray).toString());

fail("==============Java JSONArray JsonConfig#setArrayMode >>> JSON ==================");

List input = new ArrayList();

input.add("JSON");

input.add("1");

input.add("2.0");

input.add("true");

JSONArray jsonArray = (JSONArray) JSONSerializer.toJSON(input);

JsonConfig jsonConfig = new

2025年map转json字符串再转对象（map转为json对象）

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