logo
down
shadow

How do I create an object in MyBatis (Spring) mapper using select on a table (Spring)?


How do I create an object in MyBatis (Spring) mapper using select on a table (Spring)?

By : Radu Andrei
Date : November 17 2020, 01:00 AM
To fix the issue you can do It's all written in the documentation in the part where they mention the Advanced ResultMaps.
If your University class is something like this:
code :
public class University{
    private Long id;
    private String name;
    private List<Student> students;
    // getters, setters, etc.
}
public class Student{
    private String name_ofStudent;
    private Double GPA;
    private Integer age;
    private String major;
    private Long id;
    private Long universityId;
    // getters, setters, etc.
}
<select parameterType="Long" resultMap="UniversityResultMap">
    SELECT U.uni_id, U.uni_name, S.name_ofStudent, S.gpa, S.age, S.major, S.stu_id, S.stu_uni_id
    FROM UNIVERSITY U
    JOIN STUDENT S ON U.ID = S.UNIVERSITYID
    WHERE U.ID = #{id}
</select>
<resultMap id="StudentResultMap" resultMap="java.Student">
    <result column="NAME_OFSTUDENT" jdbcType="VARCHAR" property="name_ofStudent" />
    <result column="GPA" jdbcType="DECIMAL" property="GPA" />
    <result column="AGE" jdbcType="DECIMAL" property="age" />
    <result column="MAJOR" jdbcType="VARCHAR" property="major" />
    <result column="STU_ID" jdbcType="DECIMAL" property="id" />
    <result column="STU_UNI_ID" jdbcType="DECIMAL" property="universityId" />
</resultMap>

<resultMap id="UniversityResultMap" parameterType="Long" resultMap="java.University">
    <id column="UNI_ID" jdbcType="DECIMAL" property="id" />
    <result column="NAME" jdbcType="VARCHAR" property="name" />
    <collection  property="students" ofType="java.Student" resultMap="StudentResultMap"/>
</resultMap>


Share : facebook icon twitter icon
NullPointerException using Spring to @autowire mybatis mapper

NullPointerException using Spring to @autowire mybatis mapper


By : Fabio Iommi
Date : March 29 2020, 07:55 AM
help you fix your problem When we are talking about the jars used we need to coordinate the specific annotations with their concerned domains:
@SpringBean annotation for action type beans @Autowire annotation for Spring type beans
Set different ExecutorType for a specific mybatis-spring mapper

Set different ExecutorType for a specific mybatis-spring mapper


By : Luc Dandrel
Date : March 29 2020, 07:55 AM
Hope that helps After a lot of tries, I decided to change my approach to solve this problem. I defined programmatically a new SqlSessionFactory, generating a new SqlSession with the Batch Executor and I used that one. Since it is an entirely different SqlSessionFactory, it seems it doesn't give problem if I use 2 differents ExecutorType. Here a sample working code:
code :
Environment environment = new Environment("TEST", new JdbcTransactionFactory(), dataSource);
        Configuration configuration = new Configuration(environment);
        configuration.addMappers("com.mdv.dao");

        SqlSessionFactory ssf = new SqlSessionFactoryBuilder().build(configuration);
        SqlSession sqlSession = ssf.openSession(ExecutorType.BATCH);
        try {

            StagingFileMapper sfm = sqlSession.getMapper(StagingFileMapper.class);
            for(Record r : staging){
                StagingFile sf = new StagingFile();
                //set your sf fields
                sfm.insert(sf);
            }
            sqlSession.commit();
        } catch (Exception e) {
            //manage exception
        }
        finally{
            sqlSession.close();
        }
Can I set Spring AOP pointcut on mybatis mapper?

Can I set Spring AOP pointcut on mybatis mapper?


By : rymac
Date : March 29 2020, 07:55 AM
it helps some times This question has been asked dozens of times here, and always by people who want to use Spring AOP, but never really bothered to look into its documentation or at least search StackOverflow before posting questions. How can you survive as a developer like this?
The short answer is:
How can we map multiple tables in Mapper.xml using mybatis-spring?

How can we map multiple tables in Mapper.xml using mybatis-spring?


By : Heinja
Date : March 29 2020, 07:55 AM
around this issue I'm not sure if I understand your question correctly. If you are talking about how to deal with different tables, it's not a good practice to use one single mapper. It's better to split it and register your mappers in many ways. One of the examples is
code :
<mappers>
  <mapper resource="org/mybatis/builder/AuthorMapper.xml"/>
  <mapper resource="org/mybatis/builder/BlogMapper.xml"/>
  <mapper resource="org/mybatis/builder/PostMapper.xml"/>
</mappers>
How to write two parasmeters in Spring MyBatis Mapper?

How to write two parasmeters in Spring MyBatis Mapper?


By : akalest0s
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , The problem with the current approach
You currently your mapping set up in a way that doesn't accept your parameters into the DAO layer parameterType="java.util.HashMap"
code :
public List<HashMap<String, Object>> getBoardCommentOfComment(int board_idx, int board_comm_idx) 
{
   HashMap<String, Object> parameters = new HashMap<String, Object>();
   parameters.put("board_idx", board_idx);
   parameters.put("board_comm_idx", board_comm_idx");
   List<HashMap<String, Object>> c_of_c_list = boardDao.selectCommentOfComment(board_idx, board_comm_idx);
   return c_of_c_list;
}
Related Posts Related Posts :
  • The type org.openqa.selenium.firefox.FirefoxDriver is not accessible
  • Limitations (drawbacks) of java programming language?
  • Error: ')' expected Error: illegal start of expression
  • TableRowSorter use LookAndFeel of TableHeader, but own Comparator
  • Difference between @GeneratedValue and @GenericGenerator
  • Design Scenario: Smartphone class and will have derived classes like IPhone,AndroidPhone,WindowsMobilePhone can be even
  • Java date parsing without separators?
  • how to map an array of custom type from postgres to java using hibernate
  • Why hibernate always call "update" statement after using "select" statement in MySQL?
  • An interview topic: What can go wrong with this code?
  • How do I regex remove whitespace and newlines from a text, except for when they are in a json's string?
  • How to turn off Preferences > Compiles > User External Build?
  • how to convert arraylist to string array with all items in double quote
  • PMD+Maven+JAVA Error:: Can't find resource rulesets/comments.xml. Make sure the resource is a valid file or URL or is on
  • How to extend AbstractScheduledService.Scheduler
  • Primefaces tabview: set Active Index after some counting
  • Need help in Regex to exclude splitting string within "
  • Get header from HttpUrlConnection object
  • encoding xlsx as base64 and send it as an attachment
  • How to acess HttpServletRequest in Jaas login module in Tomcat
  • How to implement a basic pointer
  • Java Swing Exit Icon?
  • Why onNext has no effect
  • IntelliJ Idea 2018.2 no option for importing gradle project
  • Remove a negative element from an array w/o array.copy
  • Could this prevent overflow in Java?
  • In Java Swing, can I receive Caret events in real time?
  • I need help not using brute force when using JFrames and DrawWindows
  • How do I refactor ArrayList<MyClass> into MyClassLIst?
  • My program keeps saying that the method cannot be resolved
  • BubbleSort -my code returns random addresses
  • JavaFX components inside HTML?
  • Character in Java game not responding
  • Working around access denied in a FileWalking Tree in Java7
  • How to avoid if/else when using multple suppliers?
  • How to pass object from table cell editor to Table Model?
  • Paypal Sandbox payment state pending
  • sejda-console.bat passing parameters with spaces
  • Multiple Consumers Spring Kafka
  • Bitbucket pipeline: environmental variables in build.gradle file not recognized
  • Java static enum method to return a default enum value
  • What is the complexity of empty for loop?
  • Group randomly List of Lists as N subsets with K elements in each
  • How to set texture on a shape drawn by glDrawArrays()?
  • How to make a jlabel resizable according to the window
  • Java Mathematical Expression Syntax
  • assigning values to characters in java
  • Method overriding and Inheritance in java
  • given a set of lists/groups with a series of number, find matching numbers
  • Connection to HID USB device (keyboard and mouse) in android
  • Inject HttpServletRequest in CDI SessionScoped bean
  • Pool game in java - ball collision algorithm
  • Focus ScrollView to selected position programmatically - Android
  • Is it hibernate bug?
  • Glib memory allocation error
  • Android Proguard - step by step
  • Setting the pivot point of a JPanel to its center
  • java check time is greater time
  • how to save a screenshot (matlab)
  • Anti-aliasing filled shapes in libgdx
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org