使用android内置的JSon解析类来解析JSon数据

柔光的暖阳◎ 2022-08-18 01:00 192阅读 0赞

需要解析的数据如下：

<span style="font-size:18px;">{
        "result": 1,
        "personData": [
            {
                "name": "nate",
                "age": 12,
                "url": "http://e.hiphotos.baidu.com/zhidao/pic/item/fcfaaf51f3deb48fa05af774f31f3a292df5786c.jpg",
                "schoolInfo": [
                    {
                        "school_name": "清华"
                    },
                    {
                        "school_name": "北大"
                    }
                ]
            },
            {
                "name": "jack",
                "age": 20,
                "url": "http://e.hiphotos.baidu.com/zhidao/pic/item/fcfaaf51f3deb48fa05af774f31f3a292df5786c.jpg",
                "schoolInfo": [
                    {
                        "school_name": "清华"
                    },
                    {
                        "school_name": "北大"
                    }
                ]
            }
        ]
    }</span>

这里我们需要定义几个类来封装数据：

import java.util.List;
    
    
    public class Person {
    	private String name;
    	private int age;
    	private String url;
    	private List<SchoolInfo> schoolInfo;
    	
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public int getAge() {
    		return age;
    	}
    	public void setAge(int age) {
    		this.age = age;
    	}
    	public String getUrl() {
    		return url;
    	}
    	public void setUrl(String url) {
    		this.url = url;
    	}
    	public List<SchoolInfo> getSchoolInfo() {
    		return schoolInfo;
    	}
    	public void setSchoolInfo(List<SchoolInfo> schoolInfo) {
    		this.schoolInfo = schoolInfo;
    	}
    	
    	
    }

public class SchoolInfo {
    	
    	private String school_name;
    
    	public String getSchool_name() {
    		return school_name;
    	}
    
    	public void setSchool_name(String school_name) {
    		this.school_name = school_name;
    	}
    	
    }

解析的方法如下：

<span style="font-size:18px;">private List<Person> parseJson(String json) {
    		try {
    			JSONObject object = new JSONObject(json);
    			List<Person> persons = new ArrayList<Person>();
    			int result = object.getInt("result");
    			if (result == 1) {
    				JSONArray personData = object.getJSONArray("personData");
    				for(int i = 0; i < personData.length(); i++) {
    					Person personObject = new Person();
    					persons.add(personObject);
    					JSONObject person = personData.getJSONObject(i);
    					String name = person.getString("name");
    					int age = person.getInt("age");
    					String url = person.getString("url");
    					personObject.setName(name);
    					personObject.setAge(age);
    					personObject.setUrl(url);
    					JSONArray schoolInfos = person.getJSONArray("schoolInfo");
    					List<SchoolInfo> schInfos = new ArrayList<SchoolInfo>();
    					personObject.setSchoolInfo(schInfos);
    					for(int j = 0; j < schoolInfos.length(); j++) {
    						JSONObject school = schoolInfos.getJSONObject(i);
    						String schoolName = school.getString("school_name");
    						SchoolInfo info = new SchoolInfo();
    						info.setSchool_name(schoolName);
    						schInfos.add(info);
    					}
    					
    				}
    				return persons;
    			} else {
    				Toast.makeText(context, "error", 1).show();
    			}
    		} catch (JSONException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		return null;
    	}</span>