解析工具类：
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import com.domain.Student;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
public class GsonParserUtils {
// 谷歌Gson，生成JSON字符串和解析JSON工具类
// Gson将获取的对象生成JSON字符串
public static String toJsonString(Object obj) {
Gson gson = new Gson();
// Object是你自己定义的实体对象类
String str = gson.toJson(obj);
return str;
}
/*
* //GSON使用泛型将JSON字符串转换回实体类对象（javabean） //JSON中只有一个对象的采用这种解析
*/public static <T> T getStudent(String jsonString, Class<T> clazz) {
Gson gson = new Gson();
T t = null;
t = gson.fromJson(jsonString, clazz);
return t;
}
// JSON有多个对象时采用这种解析（注意：不包括map类的）
public static <T> List<T> getStudents(String jsonString,Class<T> clazz) {
Gson gson = new Gson();
List<T> list = new ArrayList<T>();
Type type = new TypeToken<List<T>>(){}.getType();
list = gson.fromJson(jsonString,type );
return list;
}
// JSON是字符串数组时用这种解析,注意这里是不用传入对象
public static <T> List<T> getListString(String jsonString) {
Gson gson = new Gson();
List<T> list = new ArrayList<T>();
list = gson.fromJson(jsonString, new TypeToken<List<T>>() {
}.getType());
return list;
}
// JSON如果是Map对象采用这种解析
public static List<Map<String, Object>> getListMap(String jsonStirng) {
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
Gson gson = new Gson();
list = gson.fromJson(jsonStirng,
new TypeToken<List<Map<String, Object>>>() {
}.getType());
return list;
}
}
实体类Service类：生成对象
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
//此类用来创建Student对象的工具类，用来进行谷歌GSON解析的工具类
public class StudentService {
// 生成一个Student对象
public static Student createStudent() {
Student student = new Student(111, 22, "张三");
return student;
}
// 生成多个Student对象
public static List<Student> createLsitStudent() {
Student student = new Student(111, 22, "张三");
Student student2 = new Student(112, 20, "李四");
List<Student> list = new ArrayList<Student>();
list.add(student);
list.add(student2);
return list;
}
// 生成字符串数组对象
public static List<String> createListString() {
List<String> list = new ArrayList<String>();
list.add("嘿嘿嘿");
list.add("playboy");
return list;
}
// 生成Map-Student对象
public static List<Map<String, Object>> createListMap() {
// List<Map<Integer, Object>>list=new ArrayList<Map<Integer, Object>>();
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
Map<String, Object> map = new HashMap<String, Object>();
map.put("id", 111);
map.put("age", 22);
map.put("name", "张三");
/*Student stu=new Student(111,22,"张三");
map.put("1",stu);*/
Map<String, Object> map2 = new HashMap<String, Object>();
map2.put("id", 112);
map2.put("age", 20);
map2.put("name", "李四");
list.add(map);
list.add(map2);
return list;
/*Student stu2=new Student(112,20,"李四");
map.put("2",stu2);
return list;*/
}
}
