因为工作需要。需要写api接口给h5的客户端人员调用。所以,今天花了一天的时间研究了spring+hibernate
第一步:将对应的jar文件放入到lib目录下
第二步:配置web.xml文件,其中的< display-name> 标签和description标签暂时不明白是用来干嘛的
<?xml version= "1.0" encoding ="UTF-8"?> <web-app version= "3.0" xmlns= "http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" > <display-name> baimi.routertool</display-name > <!--这里一定要写上并且和下面你的context-param里面你的param-value对应上 ,至于原因暂停还没搞明白 --> <description> 路由拓展助手商户采集系统 </description> <!-- 应用程序根目录键值 --> <context-param> <param-name> webAppRootKey</param-name > <param-value> baimi.routertool</param-value > </context-param> <!-- 设置转码过滤器--> <filter> <filter-name> encodingFilter</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> <init-param> <param-name> forceEncoding</param-name > <param-value> true</ param-value> </init-param> </filter> <filter-mapping> <filter-name> encodingFilter</filter-name > <url-pattern> /*</ url-pattern> </filter-mapping> <!-- 配置log4j 文件路径 --> <context-param> <param-name> log4jConfigLocation</param-name > <param-value> classpath:log4j.properties</param-value > </context-param> <!-- 配置spring 配置文件 --> <context-param> <param-name> contextConfigLocation</param-name > <param-value> classpath:applicationContext.xml</param-value > </context-param> <!-- 配置log4j监听 --> <listener> <listener-class> org.springframework.web.util.Log4jConfigListener</listener-class > </listener> <!-- 配置spring监听 --> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener</listener-class > </listener> <!-- 配置 Spring DispatcherServlet --> <servlet> <servlet-name> spring</ servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet</servlet-class > <!-- 配置该Servlet随应用启动时候启动 --> <load-on-startup> 2</ load-on-startup> </servlet> <!-- 配置servlet与spring映射 --> <servlet-mapping> <servlet-name> spring</ servlet-name> <url-pattern> *.do</ url-pattern> </servlet-mapping> <welcome-file-list > <welcome-file >index.jsp </welcome-file> </welcome-file-list > </web-app>
第三步:配置spring-servlet.xml文件。这个文件里面的内容只需要更改action所在包的路径就可以了(就是改context:component-scan标签)
<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> <!-- 启用spring mvc 注解 --> <context:annotation-config /> <!-- 设置action 所在包 --> <context:component-scan base-package="com.bmsh.mytest.*" /> <!-- ========================= 事物注解 ========================= --> <tx:annotation-driven transaction-manager="transactionManager" /> <context:mbean-export /> <!-- spring 默认是会加上4 个适配器,如果配置了期中一个另外的将不会加载 --> <!-- 完成请求和注解POJO的映射 --> <bean class= "org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" /> <!-- 对转向页面的路径解析。prefix:前缀, suffix:后缀 --> <bean class= "org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix= "/WEB-INF/" /> <!-- MVC 注解 URL配置管理器 --> <bean class= "org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" > </bean> </beans>
import java.lang.reflect.Field; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLException; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.log4j.Logger; import org.springframework.jdbc.core.simple.ParameterizedRowMapper; /** */ /** * 通用的Object包装类(类型问题,依然是个瓶颈,如果有好的解决方案请 pm我) * * 功能:查询对象类型或对象集合时的通用包装类 * * @author zdw * */ @SuppressWarnings({"rawtypes" }) public class ObjectMapper implements ParameterizedRowMapper { private Class clazz ; private List<String> xmlColumnList = null; Logger log = Logger. getLogger(ObjectMapper.class); public ObjectMapper(Class clazz) { this.clazz = clazz; } public ObjectMapper(Class clazz, String[] xmlString) { this.clazz = clazz; if (xmlString != null && xmlString.length > 0) { xmlColumnList = new ArrayList<String>(); for (String str : xmlString) { xmlColumnList.add(str); } } } /** */ /** * 重写mapRow方法 */ public Object mapRow(ResultSet rs, int rowNum) throws SQLException { try { Map<String, String> map = new HashMap<String, String>(); ResultSetMetaData md = rs.getMetaData(); for (int i = 0; i < md.getColumnCount(); i++) { String columnName = md.getColumnName(i + 1); String columnKey = null; if (columnName == null){ columnKey = ""; } else{ columnKey = columnName.replaceAll( "_", "" ); } map.put(columnKey.toLowerCase(), columnName.toLowerCase()); } Object obj = clazz.newInstance(); Field fields[] = obj.getClass().getDeclaredFields(); for (int i = 0; i < fields.length; i++) { Field field = fields[i]; if (field.getName().equals("serialVersionUID" ) || map.get(field.getName().toLowerCase()) == null) continue; // 暴力访问 field.setAccessible( true); this.typeMapper(field, obj, rs , map); // 恢复默认 field.setAccessible( false); } return obj; } catch (Exception e) { e.printStackTrace(); } return null ; } /** */ /** * 数据类型包装器 * * @param field * 目标属性 * @param obj * 目标对象 * @param rs * 结果集 * @throws Exception */ private void typeMapper(Field field, Object obj, ResultSet rs,Map<String,String> map) throws Exception { String type = field.getType().getName(); String result; if (type.equals("java.lang.String" )) { field.set(obj, rs.getString(map.get(field.getName().toLowerCase()))); } else if (type.equals("int")) { field.set(obj, rs.getInt(map.get(map.get(field.getName().toLowerCase())))); } else if (type.equals("java.lang.Integer")) { result = rs.getString(map.get(map.get(field.getName().toLowerCase()))); if (result == null || "".equals(result)) { field.set(obj, null); } else { field.set(obj, Integer. parseInt(result)); } } else if (type.equals("long")) { field.set(obj, rs.getLong(map.get(field.getName().toLowerCase()))); } else if (type.equals("java.lang.Long")) { result = rs.getString(map.get(field.getName().toLowerCase())); if (result == null || "".equals(result)) { field.set(obj, null); } else { field.set(obj, Long. parseLong(result)); } } else if (type.equals("boolean") || type.equals("java.lang.Boolean" )) { field.set(obj, rs.getBoolean(map.get(field.getName().toLowerCase()))); } else if (type.equals("java.util.Date")) { field.set(obj, rs.getTimestamp(map.get(field.getName().toLowerCase()))); } else if (type.equals("double") || type.equals( "java.lang.Double")) { // Double型包装 field.set(obj, rs.getDouble(map.get(field.getName().toLowerCase()))); } else if (type.equals("float") || type.equals( "java.lang.Float")) { field.set(obj, rs.getFloat(map.get(field.getName().toLowerCase()))); } else if (type.equals("java.math.BigDecimal")) { field.set(obj, rs.getBigDecimal(map.get(field.getName().toLowerCase()))); } else if (type.equals("java.sql.Timestamp")){ field.set(obj, rs.getTimestamp(map.get(field.getName().toLowerCase()))); } else if (type.equals("short") || type.equals( "java.lang.Short") ){ field.set(obj, rs.getShort(map.get(field.getName().toLowerCase()))); } else if (type.equals("byte") || type.equals( "java.lang.Byte") ){ field.set(obj, rs.getByte(map.get(field.getName().toLowerCase()))); } } }
public interface UserService { public int saveUser(List<User> list); public List<User> queryUser(); public int UpdateUser(User user); public int deleteUser(int userId); }
import java.sql.PreparedStatement; import java.sql.SQLException; import java.util.List; import org.apache.log4j.Logger; import org.springframework.jdbc.core.PreparedStatementSetter; import org.springframework.jdbc.core.support.JdbcDaoSupport; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import com.bmsh.mytest.entity.User; import com.bmsh.mytest.service.ObjectMapper; import com.bmsh.mytest.service.UserService; @Service @Transactional public class UserServiceImpl extends JdbcDaoSupport implements UserService{ Logger log=Logger. getLogger(UserServiceImpl.class); @Override public int saveUser(List<User> list) { String exesit= "select * from user where name=?" ; String insert= "insert into user(id,name,password,age) values(?,?,?,?)"; int line=0; for(final User user:list){ if(getJdbcTemplate().queryForInt(exesit, new Object[]{user.getId()})==0){ //如果执行了 sql语句,sql返回空的时候,此处返回的 int值就为0 //下一步,存储到数据库,位了避免 sql注入,采用PreparedStatement line+=getJdbcTemplate().update(insert, new PreparedStatementSetter(){ @Override public void setValues(PreparedStatement arg0) throws SQLException { arg0.setInt(1,user.getId()); arg0.setString(2, user.getName()); arg0.setString(3, user.getPassword()); arg0.setInt(4, user.getAge()); } }); } } return line; } @SuppressWarnings("unchecked" ) @Override public List<User> queryUser() { String query= "select * from user"; return getJdbcTemplate().query(query, new ObjectMapper(User.class)); } @Override public int UpdateUser(final User user) { String update= "update user set name=?,password=?,age=? where id=?" ; int line=getJdbcTemplate().update(update, new PreparedStatementSetter() { @Override public void setValues(PreparedStatement arg0) throws SQLException { arg0.setString(1, user.getName()); arg0.setString(2, user.getPassword()); arg0.setInt(3, user.getAge()); arg0.setInt(4,user.getId()); } }); return line; } @Override public int deleteUser(final int userId) { String delete= "delete from user where id=?"; int line=getJdbcTemplate().update(delete, new PreparedStatementSetter() { @Override public void setValues(PreparedStatement arg0) throws SQLException { arg0.setInt(1,userId); } }); return line; } }
import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import com.bmsh.mytest.entity.User; import com.bmsh.mytest.service.UserService; @Controller public class UserAction { @Autowired UserService userService; @RequestMapping("/queryUser.do" ) public List<User> query(HttpServletRequest request,HttpServletResponse response) { List<User> list = userService.queryUser(); return list; } }