Java Tutorial/JPA/Calendar Date — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Текущая версия на 08:18, 1 июня 2010
Содержание
Date Mapped To Timestamp By Default
File: Student.java
<source lang="java">
import java.util.Date; import javax.persistence.Basic; import javax.persistence.Entity; import javax.persistence.Id; @Entity public class Student {
@Id private long id = System.currentTimeMillis(); @Basic private String name; @Basic private Date dateOfBirth = new Date(); public Date getDateOfBirth() { return dateOfBirth; } public void setDateOfBirth(Date dateOfBirth) { this.dateOfBirth = dateOfBirth; } public long getId() { return id; } public void setId(long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }
}</source>
Java Calendar Mapped To Date
File: Helper.java
<source lang="java">
import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.Statement; public class Helper {
public static void checkData() throws Exception { Class.forName("org.hsqldb.jdbcDriver"); Connection conn = DriverManager.getConnection("jdbc:hsqldb:data/tutorial", "sa", ""); Statement st = conn.createStatement(); ResultSet mrs = conn.getMetaData().getTables(null, null, null, new String[] { "TABLE" }); while (mrs.next()) { String tableName = mrs.getString(3); System.out.println("\n\n\n\nTable Name: "+ tableName); ResultSet rs = st.executeQuery("select * from " + tableName); ResultSetMetaData metadata = rs.getMetaData(); while (rs.next()) { System.out.println(" Row:"); for (int i = 0; i < metadata.getColumnCount(); i++) { System.out.println(" Column Name: "+ metadata.getColumnLabel(i + 1)+ ", "); System.out.println(" Column Type: "+ metadata.getColumnTypeName(i + 1)+ ": "); Object value = rs.getObject(i + 1); System.out.println(" Column Value: "+value+"\n"); } } } }
}</source>
Map Java Calendar To Timestamp
File: Student.java
<source lang="java">
import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Entity public class Student {
@Id private String id; private String name; @Temporal(TemporalType.TIMESTAMP) private java.util.Calendar dob; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }
public java.util.Calendar getDob() { return dob; } public void setDob(java.util.Calendar dob) { this.dob = dob; } public String toString() { return "\n\nID:" + id + "\nName:" + name + "\n\n"+"Dob"+dob; }
}</source>
Map Java Date To Date
File: Student.java
<source lang="java">
import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Entity public class Student {
@Id private String id; private String name; @Temporal(TemporalType.DATE) private java.util.Date dob; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }
public java.util.Date getDob() { return dob; } public void setDob(java.util.Date dob) { this.dob = dob; } public String toString() { return "\n\nID:" + id + "\nName:" + name + "\n\n"+"Dob"+dob; }
}</source>
Map Java Date To Time
File: Student.java
<source lang="java">
import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Entity public class Student {
@Id private String id; private String name; @Temporal(TemporalType.TIME) private java.util.Date dob; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }
public java.util.Date getDob() { return dob; } public void setDob(java.util.Date dob) { this.dob = dob; } public String toString() { return "\n\nID:" + id + "\nName:" + name + "\n\n"+"Dob"+dob; }
}</source>
Map Java Date To Timestamp
File: Student.java
<source lang="java">
import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Entity public class Student {
@Id private String id; private String name; @Temporal(TemporalType.TIMESTAMP) private java.util.Date dob; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }
public java.util.Date getDob() { return dob; } public void setDob(java.util.Date dob) { this.dob = dob; } public String toString() { return "\n\nID:" + id + "\nName:" + name + "\n\n"+"Dob"+dob; }
}</source>
Mark Java Calendar With Temporal Type Date
File: Student.java
<source lang="java">
import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Entity public class Student {
@Id private String id; private String name; @Temporal(TemporalType.DATE) private java.util.Calendar dob; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }
public java.util.Calendar getDob() { return dob; } public void setDob(java.util.Calendar dob) { this.dob = dob; } public String toString() { return "\n\nID:" + id + "\nName:" + name + "\n\n"+"Dob"+dob; }
}</source>
Temporal Type DATE
File: Student.java
<source lang="java">
import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Entity public class Student {
@Id private String id; private String name; @Temporal(TemporalType.DATE) private java.util.Calendar dob; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }
public java.util.Calendar getDob() { return dob; } public void setDob(java.util.Calendar dob) { this.dob = dob; } public String toString() { return "\n\nID:" + id + "\nName:" + name + "\n\n"+"Dob"+dob; }
}</source>
Temporal Type TIMESTAMP
File: Student.java
<source lang="java">
import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Entity public class Student {
@Id private String id; private String name; @Temporal(TemporalType.TIMESTAMP) private java.util.Calendar dob; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }
public java.util.Calendar getDob() { return dob; } public void setDob(java.util.Calendar dob) { this.dob = dob; } public String toString() { return "\n\nID:" + id + "\nName:" + name + "\n\n"+"Dob"+dob; }
}</source>