本文介绍了一个用于自动生成实体类的网站，并提供了一段示例代码来展示如何使用Gson库解析复杂的嵌套JSON数据。重点在于解决自动生成过程中出现的问题，如@JsonProperty注解的处理及类型识别错误。
今天发现了个极好的网站，是用来自动将json数据分化为实体类的
http://api.stay4it.com/json/index.html
首先，在他自动转化为实体类的过程中，会出现
@JsonProperty("isEnd")
private int isend;
这种类型的实体数据
将@JsonProperty("isEnd")删掉，并将private int isend;改为isEnd，然后重新get set即可；
此外，在创建实体类的过程中，某些数据的类型会被识别错误，所以在自动生成实体类后检查一遍即可；
当实体类创建完毕后，利用Gson的API解析即可，当JSON数据最外层为[ ]，即数组类型的JSON数据时，如下解析：
List < Person > ps = gson.fromJson(str, new TypeToken < List < Person >> (){}.getType()); for ( int i = 0 ; i < ps.size() ; i ++ ) { Person p = ps.get(i); System.out.println(p.toString()); }
Person person = gson.fromJson(str, Person. class );
当实体类中嵌套多层List< >数据时，在代码中如下编辑即可：
List<Person> result = p.getResults();
最后附上完整代码，自行理解。
package com.example.zhouyuchen.gsontest;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import java.util.List;
public class MainActivity extends Activity {
private String JSON = "[\n" +
"\n" +
" {\n" +
" \"id\":1,\n" +
" \"count\":25,\n" +
" \"isEnd\":0,\n" +
" \"children\":[\n" +
" {\n" +
" \"id\":57,\n" +
" \"count\":3,\n" +
" \"isEnd\":0,\n" +
" \"parentInditarator\":1,\n" +
" \"children\":[\n" +
" {\n" +
" \"id\":150,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":57,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"cyxxs57\",\n" +
" \"targetName\":\"查阅信息数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":149,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":57,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"jdrc57\",\n" +
" \"targetName\":\"接待人次\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":148,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":57,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"cyds57\",\n" +
" \"targetName\":\"查阅点数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" }\n" +
" ],\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"tsg\",\n" +
" \"targetName\":\"图书馆\",\n" +
" \"targetCategory\":2,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":56,\n" +
" \"count\":3,\n" +
" \"isEnd\":0,\n" +
" \"parentInditarator\":1,\n" +
" \"children\":[\n" +
" {\n" +
" \"id\":147,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":56,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"cyxxs56\",\n" +
" \"targetName\":\"查阅信息数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":146,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":56,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"jdrc56\",\n" +
" \"targetName\":\"接待人次\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":145,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":56,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"cyds56\",\n" +
" \"targetName\":\"查阅点数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" }\n" +
" ],\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"dag\",\n" +
" \"targetName\":\"档案馆\",\n" +
" \"targetCategory\":2,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":55,\n" +
" \"count\":3,\n" +
" \"isEnd\":0,\n" +
" \"parentInditarator\":1,\n" +
" \"children\":[\n" +
" {\n" +
" \"id\":144,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":55,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"cyxxs55\",\n" +
" \"targetName\":\"查阅信息数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":143,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":55,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"jdrc55\",\n" +
" \"targetName\":\"接待人次\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":142,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":55,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"cyds55\",\n" +
" \"targetName\":\"查阅点数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" }\n" +
" ],\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zwfwzx\",\n" +
" \"targetName\":\"政务服务中心\",\n" +
" \"targetCategory\":2,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":54,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":1,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"qttjzdgkzfxxts\",\n" +
" \"targetName\":\"其他途径主动公开政府信息条数\",\n" +
" \"targetCategory\":2,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":53,\n" +
" \"count\":3,\n" +
" \"isEnd\":0,\n" +
" \"parentInditarator\":1,\n" +
" \"children\":[\n" +
" {\n" +
" \"id\":141,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":53,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"gkzfxxts53\",\n" +
" \"targetName\":\"公开政府信息条数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":140,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":53,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zfgbckqs\",\n" +
" \"targetName\":\"政府公报出刊期数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":139,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":53,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"byzfgbs\",\n" +
" \"targetName\":\"办有政府公报数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" }\n" +
" ],\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zfgbgkqk\",\n" +
" \"targetName\":\"政府公报公开情况\",\n" +
" \"targetCategory\":2,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":52,\n" +
" \"count\":3,\n" +
" \"isEnd\":0,\n" +
" \"parentInditarator\":1,\n" +
" \"children\":[\n" +
" {\n" +
" \"id\":138,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":52,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zjxxgksj52\",\n" +
" \"targetName\":\"最近信息公开时间\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":137,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":52,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"gkzfxxts52\",\n" +
" \"targetName\":\"公开政府信息条数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":136,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":52,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"ktzwwxgs\",\n" +
" \"targetName\":\"开通政务微信个数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" }\n" +
" ],\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zfwxgkqk\",\n" +
" \"targetName\":\"政务微信公开情况\",\n" +
" \"targetCategory\":2,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":51,\n" +
" \"count\":3,\n" +
" \"isEnd\":0,\n" +
" \"parentInditarator\":1,\n" +
" \"children\":[\n" +
" {\n" +
" \"id\":135,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":51,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zjgksj51\",\n" +
" \"targetName\":\"最近信息公开时间\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":134,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":51,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"gkzfxxts51\",\n" +
" \"targetName\":\"公开政府信息条数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":133,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":51,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"ktzwwbgs\",\n" +
" \"targetName\":\"开通政务微博个数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" }\n" +
" ],\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zfwbgkqk\",\n" +
" \"targetName\":\"政务微博公开情况\",\n" +
" \"targetCategory\":2,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":50,\n" +
" \"count\":5,\n" +
" \"isEnd\":0,\n" +
" \"parentInditarator\":1,\n" +
" \"children\":[\n" +
" {\n" +
" \"id\":111,\n" +
" \"count\":2,\n" +
" \"isEnd\":0,\n" +
" \"parentInditarator\":50,\n" +
" \"children\":[\n" +
" {\n" +
" \"id\":113,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":111,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zjxxgksj\",\n" +
" \"targetName\":\"最近信息公开时间\",\n" +
" \"targetCategory\":4,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":112,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":111,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zfxxgkmlgks\",\n" +
" \"targetName\":\"政府信息公开目录公开数\",\n" +
" \"targetCategory\":4,\n" +
" \"size\":0\n" +
" }\n" +
" ],\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zfxxgkmlgkqk\",\n" +
" \"targetName\":\"政府信息公开目录公开情况\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":110,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":50,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zfwzgks\",\n" +
" \"targetName\":\"政府网站公开数\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":130,\n" +
" \"count\":2,\n" +
" \"isEnd\":0,\n" +
" \"parentInditarator\":50,\n" +
" \"children\":[\n" +
" {\n" +
" \"id\":132,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":130,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zjgksj130\",\n" +
" \"targetName\":\"最近信息公开时间\",\n" +
" \"targetCategory\":4,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":131,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":130,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"wztgmlwgks\",\n" +
" \"targetName\":\"网站通过目录外公开数\",\n" +
" \"targetCategory\":4,\n" +
" \"size\":0\n" +
" }\n" +
" ],\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"wztgmlwgkqk\",\n" +
" \"targetName\":\"网站通过目录外公开情况\",\n" +
" \"targetCategory\":3,\n" +
" \"size\":0\n" +
" }\n" +
" ],\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zfwzgkqk\",\n" +
" \"targetName\":\"政府网站公开情况\",\n" +
" \"targetCategory\":2,\n" +
" \"size\":0\n" +
" },\n" +
" {\n" +
" \"id\":49,\n" +
" \"count\":1,\n" +
" \"isEnd\":1,\n" +
" \"parentInditarator\":1,\n" +
" \"topInditarator\":1,\n" +
" \"code\":\"zdgkzfxxzts\",\n" +
" \"targetName\":\"主动公开政府信息总条数\",\n" +
" \"targetCategory\":2,\n" +
" \"size\":0\n" +
" }\n" +
" ],\n" +
" \"code\":\"zdgk\",\n" +
" \"targetName\":\"主动公开\",\n" +
" \"targetCategory\":1,\n" +
" \"size\":0\n" +
" }\n" +
"\n" +
"]";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Gson gson = new Gson();
List<Gsonbean> g = gson.fromJson(JSON, new TypeToken<List<Gsonbean>>() {
}.getType());
String a = g.get(0).getChildren().get(0).getChildren().get(0).getCode();
Log.i("asdzxc", a+"");
}
}package com.example.zhouyuchen.gsontest;
import java.util.List;
public class Gsonbean {
private int id;
private int count;
private int isEnd;
private List<Children> children;
private String code;
private String targetName;
private int targetCategory;
private int size;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}
public int getIsEnd() {
return isEnd;
}
public void setIsEnd(int isEnd) {
this.isEnd = isEnd;
}
public List<Children> getChildren() {
return children;
}
public void setChildren(List<Children> children) {
this.children = children;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getTargetName() {
return targetName;
}
public void setTargetName(String targetName) {
this.targetName = targetName;
}
public int getTargetCategory() {
return targetCategory;
}
public void setTargetCategory(int targetCategory) {
this.targetCategory = targetCategory;
}
public int getSize() {
return size;
}
public void setSize(int size) {
this.size = size;
}
}package com.example.zhouyuchen.gsontest;
import java.util.List;
public class Children {
private int id;
private int count;
private int isEnd;
private int parentInditarator;
private int topInditarator;
private String code;
private String targetName;
private int targetCategory;
private int size;
private List<Children>children;
public List<Children> getChildren() {
return children;
}
public void setChildren(List<Children> children) {
this.children = children;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}
public int getIsEnd() {
return isEnd;
}
public void setIsEnd(int isEnd) {
this.isEnd = isEnd;
}
public int getParentInditarator() {
return parentInditarator;
}
public void setParentInditarator(int parentInditarator) {
this.parentInditarator = parentInditarator;
}
public int getTopInditarator() {
return topInditarator;
}
public void setTopInditarator(int topInditarator) {
this.topInditarator = topInditarator;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getTargetName() {
return targetName;
}
public void setTargetName(String targetName) {
this.targetName = targetName;
}
public int getTargetCategory() {
return targetCategory;
}
public void setTargetCategory(int targetCategory) {
this.targetCategory = targetCategory;
}
public int getSize() {
return size;
}
public void setSize(int size) {
this.size = size;
}
}
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