1、下载jar
具体到Android，需要在 http://ormlite.com/releases 页面下载两个jar 包（本文基于ORMLite的版本是：ormlite 4.49-SNAPSHOT）：
（1）core列表下的jar包；
（2）android列表下的jar包。
如图所示：
将上面的两个jar包下载后放到Android工程项目中的libs包中，如图所示：
以上完成后，ORMLite开发环境搭建就完成了，接下来就可以使用了。
2、代码：
表student.java和AClass.java
1 package com.zzw.ormlitedatabasetest;
2
3 import com.j256.ormlite.field.DatabaseField;
4 import com.j256.ormlite.table.DatabaseTable;
5
6 @DatabaseTable(tableName = "Student")
7 public class Student {
8
9 @DatabaseField(id = true, columnName = "Student_id")
10 public int Student_id;
11 @DatabaseField(columnName = "name")
12 public String name;
13 @DatabaseField(columnName = "sex")
14 public String sex;
15 @DatabaseField(columnName = "age")
16 public int age;
17 @DatabaseField(foreign = true, foreignAutoRefresh = true)
18 public AClass aClass;
19
20 public Student() {
21
22 }
23
24 public Student(String name, String sex, int age) {
25 super();
26 this.name = name;
27 this.sex = sex;
28 this.age = age;
29 }
30
31 @Override
32 public String toString() {
33 return "Student [Student_id=" + Student_id + ", name=" + name + ", sex=" + sex + ", age=" + age + ",className="
34 + aClass.name + "]";
35 }
36
37 }
Student
1 package com.zzw.ormlitedatabasetest;
2
3 import com.j256.ormlite.dao.ForeignCollection;
4 import com.j256.ormlite.field.DataType;
5 import com.j256.ormlite.field.DatabaseField;
6 import com.j256.ormlite.field.ForeignCollectionField;
7 import com.j256.ormlite.table.DatabaseTable;
8
9 @DatabaseTable(tableName = "Classess")
10 public class AClass {
11
12 @DatabaseField(id = true, columnName = "classess_id")
13 public int classess_id;
14 @DatabaseField(dataType = DataType.STRING)
15 public String name;
16 @ForeignCollectionField(eager = false)
17 public ForeignCollection<Student> students = null;
18
19 public AClass() {
20 super();
21 }
22
23 public AClass(int classess_id, String name, ForeignCollection<Student> students) {
24 super();
25 this.classess_id = classess_id;
26 this.name = name;
27 this.students = students;
28 }
29
30 }
AClass
ORMLite数据库管理工具类ORMLiteDatabaseHelper.java：
1 package com.zzw.ormlitedatabasetest;
2
3 import java.sql.SQLException;
4
5 import com.j256.ormlite.android.apptools.OrmLiteSqliteOpenHelper;
6 import com.j256.ormlite.dao.Dao;
7 import com.j256.ormlite.support.ConnectionSource;
8 import com.j256.ormlite.table.TableUtils;
9
10 import android.content.Context;
11 import android.database.sqlite.SQLiteDatabase;
12 import android.database.sqlite.SQLiteDatabase.CursorFactory;
13 import android.util.Log;
14
15 public class OrmLiteDatabaseHelper extends OrmLiteSqliteOpenHelper {
16 private static final String TAG = "OrmLiteDatabaseHelper";
17
18 public static OrmLiteDatabaseHelper mDatabaseHelper = null;
19
20 public Dao<Student, Integer> mStudentDao = null;
21 public Dao<AClass, Integer> mAClassDao = null;
22
23 public static String database_NAME = "school.db";
24 public static int database_VERSION = 1;
25
26 public OrmLiteDatabaseHelper(Context context, String databaseName, CursorFactory factory, int databaseVersion) {
27 super(context, databaseName, factory, databaseVersion);
28 }
29
30 public static OrmLiteDatabaseHelper getInstance(Context context) {
31 if (mDatabaseHelper == null) {
32 mDatabaseHelper = new OrmLiteDatabaseHelper(context, database_NAME, null, database_VERSION);
33 }
34 Log.d(TAG, "数据库school.db创建成功");
35 return mDatabaseHelper;
36 }
37
38 @Override
39 public void onCreate(SQLiteDatabase arg0, ConnectionSource arg1) {
40 try {
41 TableUtils.createTableIfNotExists(arg1, AClass.class);
42 Log.e(TAG, "AClass表在School.db中被创建");
43 TableUtils.createTableIfNotExists(arg1, Student.class);
44 Log.e(TAG, "Student表在School.db中被创建");
45 } catch (SQLException e) {
46 e.printStackTrace();
47 }
48
49 }
50
51 @Override
52 public void onUpgrade(SQLiteDatabase arg0, ConnectionSource arg1, int arg2, int arg3) {
53
54 }
55
56 public Dao<Student, Integer> getStudentDao() {
57 if (mStudentDao == null) {
58 try {
59 mStudentDao = getDao(Student.class);
60 Log.e(TAG, "得到Student的Dao");
61 } catch (SQLException e) {
62 e.printStackTrace();
63 }
64 }
65 return mStudentDao;
66 }
67
68 public Dao<AClass, Integer> getAClassDao() {
69 if (mAClassDao == null) {
70 try {
71 mAClassDao = getDao(AClass.class);
72 Log.e(TAG, "得到AClass的Dao");
73 } catch (SQLException e) {
74 e.printStackTrace();
75 }
76 }
77 return mAClassDao;
78 }
79
80 @Override
81 public void close() {
82 super.close();
83 if (mAClassDao != null) {
84 mAClassDao = null;
85 }
86 if (mStudentDao != null) {
87 mStudentDao = null;
88 }
89 }
90 }
MainActivity:
1 package com.zzw.ormlitedatabasetest;
2
3 import java.sql.SQLException;
4 import java.util.List;
5
6 import com.j256.ormlite.dao.Dao;
7
8 import android.app.Activity;
9 import android.graphics.Color;
10 import android.os.Bundle;
11 import android.util.Log;
12 import android.widget.ScrollView;
13 import android.widget.TextView;
14 import android.widget.Toast;
15
16 public class MainActivity extends Activity {
17
18 private static final String TAG = "MainActivity";
19
20 private Dao<AClass, Integer> mAClassDao = null;
21 private Dao<Student, Integer> mStudentDao = null;
22
23 AClass aClass1, aClass2, aClass3, aClass4, aClass5;
24
25 @Override
26 protected void onCreate(Bundle savedInstanceState) {
27 super.onCreate(savedInstanceState);
28 setContentView(R.layout.activity_main);
29
30 OrmLiteDatabaseHelper mOrmLiteDatabaseHelper = OrmLiteDatabaseHelper.getInstance(this);
31
32 mAClassDao = mOrmLiteDatabaseHelper.getAClassDao();
33 mStudentDao = mOrmLiteDatabaseHelper.getStudentDao();
34
35 }
36
37 @Override
38 protected void onStart() {
39 Log.d(TAG, ">>>>>>>>>>>>");
40 super.onStart();
41 int AClasses_count = createAClasses();
42 if (AClasses_count == 5) {
43 try {
44 aClass1 = mAClassDao.queryForId(1);
45 aClass2 = mAClassDao.queryForId(2);
46 aClass3 = mAClassDao.queryForId(3);
47 aClass4 = mAClassDao.queryForId(4);
48 aClass5 = mAClassDao.queryForId(5);
49
50 createStudents();
51
52 } catch (Exception e) {
53 e.printStackTrace();
54 }
55 } else {
56 Toast.makeText(this, "班级创建错误", 0).show();
57 }
58 queryAllStudents();
59 }
60
61 private void createStudents() {
62 Log.d(TAG, "学生创建开始------>");
63 Student student = new Student();
64 for (int i = 1; i <= 20; i++) {
65 student.Student_id = i;
66 student.age = (int) (Math.random() * 100);
67 if (i % 2 == 0) {
68 student.sex = "男";
69 } else {
70 student.sex = "女";
71 }
72 if (i > 0 && i <= 4) {
73 student.aClass = aClass1;
74 student.name = "陶" + i;
75 } else if (i > 4 && i <= 8) {
76 student.aClass = aClass2;
77 student.name = "李" + i;
78 } else if (i > 8 && i <= 12) {
79 student.aClass = aClass3;
80 student.name = "阿" + i;
81 } else if (i > 12 && i <= 16) {
82 student.aClass = aClass4;
83 student.name = "曾" + i;
84 } else {
85 student.aClass = aClass5;
86 student.name = "蒋" + i;
87 }
88
89 try {
90 mStudentDao.createIfNotExists(student);
91 } catch (SQLException e) {
92 e.printStackTrace();
93 }
94 }
95 Log.d(TAG, "学生创建成功------>");
96 }
97
98 private int createAClasses() {
99 Log.d(TAG, "班级创建开始------>");
100 AClass aClass = new AClass();
101 int AClasses_count = 0;
102 for (int i = 1; i <= 5; i++) {
103 aClass.classess_id = i;
104 aClass.name = "高三" + i + "班";
105 try {
106 mAClassDao.createIfNotExists(aClass);
107 AClasses_count++;
108 } catch (SQLException e) {
109 e.printStackTrace();
110 }
111 }
112 Log.d(TAG, "班级创建成功------>");
113 return AClasses_count;
114 }
115
116 private void queryAllStudents() {
117 Log.d(TAG, "查询全部学生开始------>>>>");
118 try {
119 List<Student> students = mStudentDao.queryForAll();
120 if (students != null && students.size() > 0) {
121 for (Student student : students) {
122 Log.i(TAG, student.toString());
123 }
124 }
125 } catch (SQLException e) {
126 e.printStackTrace();
127 }
128 Log.d(TAG, "查询全部学生完毕------>>>>");
129 }
130
131 @Override
132 protected void onDestroy() {
133 super.onDestroy();
134 if (mAClassDao != null) {
135 mAClassDao = null;
136 }
137 if (mStudentDao != null) {
138 mStudentDao = null;
139 }
140 Log.d(TAG, "<<<<<<<<<<<");
141 }
142
143 }
时间： 2024-10-14 05:00:45