SpringMVC+mybatis HTML5 全新高大尚后台框架_集成代码生成器

1.??Json字符串转换为java对象

1.1.? Json字符串转换为java bean

Json2Bean.java

package jackson;

?

import java.io.IOException;

?

import org.codehaus.jackson.map.ObjectMapper;

?

public class Json2Bean {

?

?? public static void main(String[] args) throws IOException{

?

????? String jsonStr = "{\"name\":\"Morris\",\"age\":\"22\",\"sex\":\"男\"}";

?????

????? ObjectMapper mapper = new ObjectMapper();

?????

????? Person person = mapper.readValue(jsonStr, Person.class);

?????

????? System.out.println(person);

?? }

?

}

?

1.2.? Json字符串转换为java List集合

Json2List.java

package jackson;

?

import java.io.IOException;

import java.util.LinkedHashMap;

import java.util.List;

?

import org.codehaus.jackson.map.ObjectMapper;

?

public class Json2List {

?

?? public static void main(String[] args) throws IOException {

?

????? String jsonStr = "[{\"name\":\"Bob\",\"age\":\"33\",\"sex\":\"女\"},"

?????????? + "{\"name\":\"Morris\",\"age\":\"22\",\"sex\":\"男\"}]";

?????

????? ObjectMapper mapper = new ObjectMapper();

?????

????? List<LinkedHashMap<String, String>> list = mapper.readValue(jsonStr, List.class);

?????

????? for (LinkedHashMap<String, String> linkedHashMap : list) {

??????? for (String key:linkedHashMap.keySet()) {

??????? ?? System.out.println(key+":"+linkedHashMap.get(key));

??????? }

????? }

?? }

?

}

?

运行结果如下:

name:Bob

age:33

sex:女

name:Morris

age:22

sex:男

1.3.? Json字符串转换为java Map集合

Json2Map.java

package jackson;

?

import java.io.IOException;

import java.util.Map;

import java.util.Set;

?

import org.codehaus.jackson.map.ObjectMapper;

?

public class Json2Map {

?

?? public static void main(String[] args) throws IOException {

?

????? String jsonStr = "{\"success\":true,\"A\":{\"address\": \"address2\",\"name\":\"haha2\",\"id\":2,\"email\":\"email2\"},"+

??????????????? "\"B\":{\"address\":\"address\",\"name\":\"haha\",\"id\":1,\"email\":\"email\"}}";

?????

????? ObjectMapper mapper = new ObjectMapper();

?????

????? Map map = mapper.readValue(jsonStr, Map.class);

?????

????? Set keySet = map.keySet();

?????

????? for (Object key : keySet) {

??????? System.out.println(key+":"+map.get(key));

????? }

?

?? }

?

}

?

运行结果如下:

success:true

A:{address=address2, name=haha2, id=2,email=email2}

B:{address=address, name=haha, id=1,email=email}

1.4.? Json字符串转换为数组

Json2Array.java

package jackson;

?

import java.io.IOException;

?

import org.codehaus.jackson.map.ObjectMapper;

?

public class Json2Array {

?

?? public static void main(String[] args) throws IOException {

?????

????? String jsonStr = "[{\"name\":\"Bob\",\"age\":\"33\",\"sex\":\"女\"},"

?????????? + "{\"name\":\"Morris\",\"age\":\"22\",\"sex\":\"男\"}]";

?????

????? ObjectMapper mapper = new ObjectMapper();

?????

????? Person[] persons = mapper.readValue(jsonStr, Person[].class);

?????

????? for (Person person : persons) {

??????? System.out.println(person);

????? }

?????

?????

?

?? }

?

}

?

运行结果如下:

Person [name=Bob, age=33, sex=女]

Person [name=Morris, age=22, sex=男]