2025年map转json字符串再转对象（map转为json对象）

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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
@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() {

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```
jsonArray = new JSONArray(); jsonObject = new JSONObject(); bean = new Student(); bean.setAddress(&quot;address&quot;); bean.setEmail(&quot;email&quot;); bean.setId(1); bean.setName(&quot;haha&quot;); Birthday day = new Birthday(); day.setBirthday(&quot;2010-11-22&quot;); bean.setBirthday(day); 
```
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}

@After public void destory() {
```
讯享网jsonArray = null; jsonObject = null; bean = null; System.gc(); 
```
}

public final void fail(String string) {
```
System.out.println(string); 
```
}

public final void failRed(String string) {
```
讯享网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(&quot;key:&quot; + key); return value + &quot;修改过的日期&quot;; } }); 
```
 jsonObject = JSONObject.fromObject(bean, jsonConfig);
 
 fail(jsonObject.toString()); Student student = (Student) JSONObject
```
讯享网 .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 + &quot;%%%&quot; + name + &quot;--&quot; + value); // 忽略birthday属性 if (value != null &amp;&amp; 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() {
```
讯享网public boolean apply(Object source, String name, Object value) { fail(name + &quot;@&quot; + value + &quot;#&quot; + source); if (&quot;id&quot;.equals(name) || &quot;email&quot;.equals(name)) { value = name + &quot;@@&quot;; 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(
```
 &quot;integer&quot;, &quot;1&quot;).element(&quot;double&quot;, &quot;2.0&quot;).element(&quot;boolean&quot;, &quot;true&quot;); 
```
 fail(JSONSerializer.toJSON(jsonObject).toString());
 
 fail("==============Java JSONArray >>> JSON =================="); jsonArray = new JSONArray().element("JSON").element("1").element("2.0")
```
讯享网 .element(&quot;true&quot;); 
```
 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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