Java
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Hibernate setproperty method: specify the configuration property for the configuration object
setProperty(String propertyName,String value) Example 1 Configuration cfg = new Configuration() .setProperty("hib…… -
JSP JSTL < FMT: Message > tag: reading local messages
Grammar 1 Grammar 2 subtags Example <%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt…… -
Hibernate generate_ Statistics property: collect statistics
hibernate. generate_ Statistics = attribute value Example <property name="hibernate.generate_statistics"> t…… -
Detailed explanation of Java object class: common methods of object class (equals() and getclass())
public class MyClass{…} public class MyClass extends Object {…} Equals() method boolean result = obj.equals(Obje…… -
Hibernate distinct method: set the uniqueness of query results
distinct(Projection proj) Example Criteria criteria = session.createCriteria(UserForm.class); //获取Criteria对象 c…… -
Java Gobang game (with source code and analysis)
import java.util.Scanner; public class Gobang { // 定义棋盘的大小 public static int BOARD_SIZE = 15; …… -
Hibernate contains method: judge whether the object exists in the cache
contains(Object object) Example if(session.contains(uf)){ //判断示例对象uf是否在缓存中 System.out.println("uf在…… -
Does java have multidimensional arrays?
type[][] arrName; arrName = new type[length][] public class TwoDimensionTest { public static void main(String[]…… -
Hibernate and method: logic and operation
and(Criterion lhs,Criterion rhs) Example Criteria criteria = session.createCriteria(UserForm.class); //获取Criteria…… -
JSP pagecontext object: access JSP built-in objects
${PageContext.request[expression]} Example ${PageContext.session.username} -
Springweb < form: Options > tab: defines multiple options for a drop-down selection box or list box
Example 1 public class Fans{ List fanList = new ArrayList(); //定义一个List集合 public List getFanList(){ /…… -
Spring saveorupdateall method: saves or updates the collection of entity objects
saveOrUpdateAll(Collection entities)@H_ 403_ 3 @ Parameter Description: Example 1 public static void main(String[] a…… -
Struts 2 combobox tag: generates a combination of a single line text box and a drop-down list
< / s: combo@R_120_2419 @>/ / display of multiple selection boxes < / s: Form > Example &…… -
Spring queryformap method: query results are saved in the map collection
Grammar 1 queryForMap(String sql) Example public static void main(String[] args){ ApplicationContext context = ne…… -
Execution order of finally and return in Java
1. Try and catch contain return public class tryDemo { public static int show() { try { r…… -
Spring xmlbeanfactory class: parsing spring configuration
Xmlbeanfactory(Resource resource) Example public static void main(String[] args){ Resource res = new ClassPathRes…… -
Common problems and misunderstandings about Java static
Use misunderstanding public class Student { public static String name = "张三"; private static int age = 1…… -
Introduction to common methods of string API
1）char charAt (int index) 2）int codePointAt(int index) 5.0 3）int offsetByCodePoints(int startIndex,int cpCount) 5.0…… -
Java project: the development of Tianxia Taoshang mall system
Development background requirement analysis Functional structure System flow development environment System Preview F…… -
Hibernate addjoin method: associate an entity with a collection
addJoin(String alias,String path) Example Session session = sessionFactory.openSession(); //创建Session对象 String…… -
Struts 2 bean tag: create and instantiate a JavaBean object
< s: bean name = "Fe. ZX. Person" > < s: param name = "username" value = "'Mr '" / > / / sub tag < s: p…… -
Hibernate Ge method: set the condition greater than or equal to
ge(String propertyName,Object value) Example Criteria criteria = session.createCriteria(UserForm.class); //创建Crit…… -
JSP JSTL < SQL: update > tag: update data
Syntax: The syntax of the query statement is as follows: actions The syntax of conditional query is a…… -
JSP JSTL < x: set > tag: save XML node
Example <%@taglib prefix="x" uri="http://java.sun.com/jsp/jstl/xml"%> <%@taglib prefix="c" uri="ht…… -
The difference between Java abstract classes and interfaces
1) Abstract class 2) Interface 3) The difference between abstract classes and interfaces 4) Application scenarios of a…… -
Java collection interface
Example 1 public static void main(String[] args) { ArrayList list1 = new ArrayList(); // 创建集合 list1 Ar…… -
Spring queryforobject method: the result of the query is returned as an object type
queryForObject(String sql,Class requiredType) Example public static void main(String[] args){ ApplicationContext …… -
Java for statement explanation
for(条件表达式1;条件表达式2;条件表达式3) { 语句块; } public static void main(String[] args) { int result=1; …… -
BBS forum system development of Java project practice (with source code and analysis)
Development background System functional structure System business process System development environment System Previ…… -
Spring getdriverclassname method: get the name of the database driver class
getDriverClassName() Example public static void main(String[] args){ String driver = "com.MysqL.jdbc.Driver"; …… -
JSP JSTL < C: catch > tag: catch exception tag
< C: catch [var = "name"] >... Code with exception < / C: catch > Example <%@taglib prefix="c" uri="h…… -
JSP JSTL < C: remove > tag: remove tag
Example <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <c:set var="name" value="C语言……