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LitePalDemo

#基于郭霖大神的LitePal实现效果如图：具体实现步骤：在build.gradle文件中添加

    implementation 'org.litepal.android:java:3.0.0'

在Application中添加初始化操作：


public class MyApplication extends Application{
   
   @Override
   public void onCreate() {
       super.onCreate();
       
       LitePal.initialize(this);
       
   }
   
}

定义一个User类extend LitePalSupport类

public class User extends LitePalSupport{
    private int id;
    private String name;
    private String sex;
    private String age;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String getAge() {
        return age;
    }
    public void setAge(String age) {
        this.age = age;
    }
}

具体的insertData操作为：

        User user = new User();
        user.setName(name);
        user.setSex(sex);
        user.setAge(age);
        deleteData
        
        user.save();

deleteData操作为：

 LitePal.deleteAll(User.class, "name = ? ", name);
 LitePal.deleteAll(User.class, "sex = ? ", sex);
 LitePal.deleteAll(User.class, "age = ? ", age);

updateData操作为：

        User user = LitePal.find(User.class, Integer.valueOf(id));
        user.setName(name);
        user.setSex(sex);
        user.setAge(age);
        user.update(Integer.valueOf(id));

selectData操作为：

List<User> allUsers = LitePal.findAll(User.class);

StringBuilder sql = new StringBuilder(" 1 = 1 ");
sql.append(" and sex like '%").append(sex).append("%'");
LitePal.where(sql.toString()).find(User.class)

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