SpringBoot中使用PageHelper

简单使用

• 集成

<dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper-spring-boot-starter</artifactId>
      <version>1.2.13</version>
  </dependency>

• 添加properties配置项

pagehelper.helper-dialect=sqlite
  pagehelper.reasonable=true
  pagehelper.support-methods-arguments=true

• service、dao、mapper中进行常规查询

//mapper
  select * from user
  
  //dao
  List<User> getUsers();
  
  //service
  public List<User> getUsers() {
      return wrapperDao.getUsers();
  }

• controller中添加分页逻辑

@GetMapping("getUsers")
public PageInfo<User> getUsers(int page, int pageSize) {
    /*return PageHelper.startPage(page, pageSize).doSelectPageInfo(
            () -> wrapperService.getUsers()
    );*/

    PageHelper.startPage(page, pageSize);
    List<User> users = wrapperService.getUsers();
    return new PageInfo<>(users);
}

问题记录

otherExceptionHandler:org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property=‘First_PageHelper’, mode=IN, javaType=class java.lang.Integer, jdbcType=null, numericScale=null, resultMapId=‘null’, jdbcTypeName=‘null’, expression=‘null’}. Cause: org.apache.ibatis.type.TypeException: Error setting non null for parameter #1 with JdbcType null . Try setting a different JdbcType for this parameter or a different configuration property. Cause: java.lang.ArrayIndexOutOfBoundsException: 0

//mapper.xml中简单的sql有问题，查了一天
select * from user;

//解决办法去掉分号，如下即可正常查询不报错
select * from user