发表于： 2017-10-16 22:24:09
1 797
今天完成的任务
json-taglib
这部分网络上的内容都是照抄json官网的，感觉没啥参考价值，然后看了师兄的日报，依赖和mvc文件配置参考的师兄的
jsp页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" import="java.util.*"%>
<!--相当于response.setContentType("text/html; charset=UTF-8"); 通知浏览器以UTF-8进行中文解码 导入jar包-->
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
<%@ taglib prefix="json" uri="http://www.atg.com/taglibs/json" %>
<html>
<body>
<json:object>
<json:array name="category" var="c">
<json:object>
<json:property name="id" value="${c.id}"/>
<json:property name="name" value="${c.name}"/>
</json:object>
</json:array>
</json:object>
</body>
</html>
输出结果。
关于json-taglib.jar，放在maven本地仓库后。
在cmd中键入mvn install:install-file -Dfile=G:\learning\apache-maven-3.5.0\lib\json-taglib-0.4.1.jar -DgroupId=3rdparty -DartifactId=json-tag-lib- -Dversion=0.4.1 -Dpackaging=jar
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重写task2
1.model层，实体类
2.dao层，关于数据库sql语句
public interface CategoryMapper {
@Select("select * from student")
public List<Category> list();//查询,使用了xml
@Insert("insert into student ( id,home,no,EntranceTime,name,sex,age,qq,school,city,motto) values (#{id},#{home},#{no},#{EntranceTime},#{name},#{sex},#{age},#{qq},#{school},#{city},#{motto})")
@Options(useGeneratedKeys=true)//返回主键
public void add( Category category);//添加
@Delete("delete from student where id= #{id}")
public int del(Category category);//删除
@Update("update student set name=#{name} where id=#{id}")
public int upd(Category category);//改名字
@Select("select * from student where name= #{name} ")
public List<Category> selName(Category category);//查名字
@Select("select * from student where id= #{id} ")
public List<Category> selId(int id);//查id
@Select("select * from student where no= #{no} ")
public List<Category> selNo(Category category);//查学号
}
使用全接口的形式
3.applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:annotation-config />
<context:component-scan base-package="com.task.service" />
<context:property-placeholder location="classpath:db.properties" />
<!--配置p3c0-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driverClass}"/>
<property name="jdbcUrl" value="${jdbc.jdbcUrl}"/>
<property name="user" value="${jdbc.user}"/>
<property name="password" value="${jdbc.password}"/>
<property name="initialPoolSize" value="${jdbc.initPoolSize}"/>
<property name="maxPoolSize" value="${jdbc.maxPoolSize}"/>
</bean>
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="typeAliasesPackage" value="com.task.model" />
<property name="plugins">
<array>
<bean class="com.github.pagehelper.PageInterceptor">
<property name="properties">
<!--使用下面的方式配置参数，一行配置一个 -->
<value>
</value>
</property>
</bean>
</array>
</property>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.task.dao"/>
</bean>
</beans>
四个bean的作用分别是
1.声明c3p0连接池，并且调用db.properties的参数
2.装配model层
3.装配PageHelper，分页查询
4.装配dao层
4.log4j
log4j.rootLogger = debug,stdout,E
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern =%5p [%t] - %m%n
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File = ./src/main/resources/log/errorLog/errorLog.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss} [ %t:%r ] - [ %p ] %m%n
log4j.rootLogger = debug,stdout,D,E
将debug级别的信息输出到控制台,E
设置E输出ERROR级别的信息到相对路径log文件夹里
5.test类
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class test {
@Autowired
//因idea检测不到Spring装配的CategoryMapper，需通过此标签声明
@SuppressWarnings("SpringJavaAutowiringInspection")
CategoryMapper categoryMapper;
//查询
@Test
public void List() {
List<Category> cs = categoryMapper.list();
for (Category c : cs) {
System.out.println(c.toString());
}
}
@RunWith 测试类
@ContextConfiguration("classpath:applicationContext.xml")装备数据库连接的测试文件
@Autowired
//因idea检测不到Spring装配的CategoryMapper，需通过此标签声明
@SuppressWarnings("SpringJavaAutowiringInspection")
CategoryMapper categoryMapper;
@Autowired通过标签装配DAO层
以上为任务一的部分
5.wel.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<display-name>mvc-dispatcher</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<!-- spring的配置文件-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- spring mvc核心：分发servlet -->
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- spring mvc的配置文件 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/springMVC.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
web.xml还是不甚了解
现在能知道的不过是装配MVC.xml和applicationContext.xml
6.
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<context:annotation-config/>
<context:component-scan base-package="com.task.controller">
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<mvc:annotation-driven />
<mvc:default-servlet-handler />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/view/" />
<property name="suffix" value=".jsp" />
</bean>
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter"/>
</list>
</property>
</bean>
<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
</beans>
<context:component-scan base-package="com.task.controller">
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
装配controller
三个bean分别是
1.声明jsp地址并装配
2.转换message对象
3.转换json对象，并声明字符编码
7.service层业务层，重新定义dao层接口
public interface CategoryService {
List<Category>list();
public void add( Category category);
public int del(Category category);
public int upd(Category category);
List<Category> selName(Category category);
List<Category> selId(int id);
List<Category> selNo(Category category);
}
8.controller层
/*
controller类，负责对web的接口
*/
@Controller
@RequestMapping(value = "task2",method = RequestMethod.GET)
class CategoryController {
@Autowired
CategoryService categoryService;
//设置log4j
static Logger logger = Logger.getLogger(CategoryController.class);
/*
基于PageHelper进行分页查询
total为总页码
*/
@RequestMapping(value ="/list", method = RequestMethod.GET)
public String getCategory(Page page , Model model){
PageHelper.offsetPage(page.getStart(),5);
List<Category> cs= categoryService.list();
int total = (int) new PageInfo<Category>(cs).getTotal();
logger.debug(total+"total信息");
page.caculateLast(total);
logger.debug(cs+"cs信息");
model.addAttribute("list",cs);
logger.debug("list");
return "list";
}
/*
添加接口
使用POST
在jsp中输入category
*/
@RequestMapping(value = "/add" ,method = RequestMethod.POST)
public String addCategory(Category category){
categoryService.add(category);
return "add";
}
/*
删除接口
使用DELETE
*/
@RequestMapping(value="/del" ,method = RequestMethod.DELETE)
public String delCategory(Category category) {
categoryService.del(category);
return "del";
}
/*
修改语句
*/
@RequestMapping(value="/upd",method = RequestMethod.POST)
public String updCategory(Category category){
categoryService.upd(category);
return "upd";
}
/*
根据ID查询一条数据,用get方法
*/
@RequestMapping(value = "selI/{id}", method = RequestMethod.GET)
public String queryOne(@PathVariable(value = "id") Integer id,Model model) {
List<Category> cs= categoryService.selId(id);
model.addAttribute("getName",cs);
return "selI";
}
/*
使用@ResponseBody标签输入输出json
*/
@RequestMapping(value ="listCategory", method = RequestMethod.GET)
public @ResponseBody List<Category> listCategory(Model model){
List<Category> cs= categoryService.list();
model.addAttribute("listCategory",cs);
return cs;
}
@RequestMapping(value ="addCategory", method = RequestMethod.POST)
public @ResponseBody List<Category> adCategory (Category category){
categoryService.add(category);
List<Category> cs= categoryService.list();
return cs;//仅作查询
}
}
@Controller声明为controller层
类上的
@RequestMapping(value = "task2",method = RequestMethod.GET)
声明第一层地址
方法上的
@RequestMapping声明次级地址
return返回调用一次方法后返回的jsp页面
明天要做的事
遇到的问题
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