@Configuration可理解为用spring的时候xml里面的<beans>标签
@Bean可理解为用spring的时候xml里面的<bean>标签
控制类
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package
com.how2java.springboot.web;
import
java.util.List;
import
org.springframework.beans.factory.annotation.Autowired;
import
org.springframework.stereotype.Controller;
import
org.springframework.ui.Model;
import
org.springframework.web.bind.annotation.RequestMapping;
import
org.springframework.web.bind.annotation.RequestParam;
import
com.github.pagehelper.PageHelper;
import
com.github.pagehelper.PageInfo;
import
com.how2java.springboot.mapper.CategoryMapper;
import
com.how2java.springboot.pojo.Category;
@Controller
public
class
CategoryController {
@Autowired
CategoryMapper categoryMapper;
@RequestMapping
(
"/addCategory"
)
public
String listCategory(Category c)
throws
Exception {
categoryMapper.save(c);
return
"redirect:listCategory"
;
}
@RequestMapping
(
"/deleteCategory"
)
public
String deleteCategory(Category c)
throws
Exception {
categoryMapper.delete(c.getId());
return
"redirect:listCategory"
;
}
@RequestMapping
(
"/updateCategory"
)
public
String updateCategory(Category c)
throws
Exception {
categoryMapper.update(c);
return
"redirect:listCategory"
;
}
@RequestMapping
(
"/editCategory"
)
public
String listCategory(
int
id,Model m)
throws
Exception {
Category c= categoryMapper.get(id);
m.addAttribute(
"c"
, c);
return
"editCategory"
;
}
@RequestMapping
(
"/listCategory"
)
public
String listCategory(Model m,
@RequestParam
(value =
"start"
, defaultValue =
"0"
)
int
start,
@RequestParam
(value =
"size"
, defaultValue =
"5"
)
int
size)
throws
Exception {
PageHelper.startPage(start,size,
"id desc"
);
List<Category> cs=categoryMapper.findAll();
PageInfo<Category> page =
new
PageInfo<>(cs);
m.addAttribute(
"page"
, page);
return
"listCategory"
;
}
}
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配置 PageHealper
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package
com.how2java.springboot.config;
import
java.util.Properties;
import
org.springframework.context.annotation.Bean;
import
org.springframework.context.annotation.Configuration;
import
com.github.pagehelper.PageHelper;
@Configuration
public
class
PageHelperConfig {
@Bean
public
PageHelper pageHelper() {
PageHelper pageHelper =
new
PageHelper();
Properties p =
new
Properties();
p.setProperty(
"offsetAsPageNum"
,
"true"
);
p.setProperty(
"rowBoundsWithCount"
,
"true"
);
p.setProperty(
"reasonable"
,
"true"
);
pageHelper.setProperties(p);
return
pageHelper;
}
}
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来自：http://how2j.cn/k/springboot/springboot-crud/1742.html#nowhere