史上最简单的MyBatis动态SQL入门示例代码(2)-木庄网络博客

Service如下：

package net.sonng.service;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.annotation.Resource;
import net.sonng.dao.BookDao;
import net.sonng.entity.Book;
import org.springframework.stereotype.Service;
@Service
public class TestService {
  @Resource
  private BookDao bookDao;
  public List<Book> multipSearch(String name,String press,String douban,String isbn){
    Map<String,String> map=new HashMap();
    if (name!=null && !name.equals("")) {
      map.put("name", "%"+name+"%");
    }
    if (press!=null && !press.equals("")) {
      map.put("press","%"+press+"%");
    }
    if (douban!=null && !douban.equals("")){
      map.put("douban", douban);
    }
    if (isbn!=null && !isbn.equals("")) {
      map.put("isbn", isbn);
    }
    return bookDao.multipSearch(map);
  }
}

测试类如下：

package net.sonng.test;
import java.util.List;
import net.sonng.controller.TestController;
import net.sonng.entity.Book;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Test {
  public static void main(String[] args){
    ApplicationContext ac=new ClassPathXmlApplicationContext("ac.xml");
    TestController tc=ac.getBean("testController",TestController.class);//下面的4种查询语句，都可以一条动态SQL执行
    //List<Book> books=tc.multipSearch("Java", "", "", "");        //查询到4条
    //List<Book> books=tc.multipSearch("Java", "机械", "", "");      //3条
    //List<Book> books=tc.multipSearch("Java", "机械", "8", "");      //2条
    List<Book> books=tc.multipSearch("Java" ,"机械", "8", "9787111213826");//1条
    for (Book book:books){
      System.out.println(book.getId());
      System.out.println(book.getName());
      System.out.println(book.getIsbn());
      System.out.println(book.getAuthor());
      System.out.println(book.getPress());
      System.out.println(book.getDouban());
      System.out.println("----------------------------------");
    }
  }
}

以上所述是小编给大家介绍的史上最简单的MyBatis动态SQL入门示例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！

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