Java tutorial
/** * Copyright (c)2010-2011 Enterprise Website Content Management System(EWCMS), All rights reserved. * EWCMS PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * http://www.ewcms.com */ package com.ewcms.content.particular.dao; import java.sql.ResultSet; import java.sql.SQLException; import java.util.List; import javax.persistence.TypedQuery; import javax.sql.DataSource; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.jdbc.core.RowMapper; import org.springframework.stereotype.Repository; import com.ewcms.common.dao.JpaDAO; import com.ewcms.content.particular.model.Dense; import com.ewcms.content.particular.model.EnterpriseArticle; @Repository public class FrontEnterpriseArticleDAO extends JpaDAO<Long, EnterpriseArticle> { private JdbcTemplate jdbcTemplate; @Autowired private FrontEnterpriseBasicDAO frontEnterpriseBasicDAO; @Autowired public void setDataSource(DataSource dataSource) { jdbcTemplate = new JdbcTemplate(dataSource); } public List<EnterpriseArticle> findEnterpriseArticleLimit(Integer number) { String hql = "From EnterpriseArticle As p where p.release=true Order By p.published desc limit " + number; TypedQuery<EnterpriseArticle> query = this.getEntityManager().createQuery(hql, EnterpriseArticle.class); return query.getResultList(); } public List<EnterpriseArticle> findEnterpriseChannelArticleLimit(Integer channelId, Integer number) { String hql = "From EnterpriseArticle As p where p.channelId=:channelId and p.release=true Order By p.published desc limit " + number; TypedQuery<EnterpriseArticle> query = this.getEntityManager().createQuery(hql, EnterpriseArticle.class); query.setParameter("channelId", channelId); return query.getResultList(); } public List<EnterpriseArticle> findEnterpriseArticleBySector(Long organId) { String hql = "From EnterpriseArticle As p where p.organ.id=:organId and p.release=true Order By p.published desc "; TypedQuery<EnterpriseArticle> query = this.getEntityManager().createQuery(hql, EnterpriseArticle.class); query.setParameter("organId", Integer.valueOf(organId.toString())); return query.getResultList(); } public List<EnterpriseArticle> findEnterpriseArticleByCode(String code) { String hql = "From EnterpriseArticle As p where p.enterpriseBasic.yyzzzch=:code and p.release=true Order By p.published desc "; TypedQuery<EnterpriseArticle> query = this.getEntityManager().createQuery(hql, EnterpriseArticle.class); query.setParameter("code", code); return query.getResultList(); } public List<EnterpriseArticle> findEnterpriseArticleByPage(int page, int row) { String sql = "Select * " + "From particular_enterprise_article where release=true " + "Order By published desc Limit ? OffSet ?"; int offset = page * row; Object[] params = new Object[] { row, offset }; List<EnterpriseArticle> list = jdbcTemplate.query(sql, params, new RowMapper<EnterpriseArticle>() { @Override public EnterpriseArticle mapRow(ResultSet rs, int rowNum) throws SQLException { return interactionRowMapper(rs); } }); return list; } public List<EnterpriseArticle> findEnterpriseChannelArticleByPage(int channelId, int page, int row) { String sql = "Select * " + "From particular_enterprise_article " + "where channel_id=? and release=true " + "Order By published desc Limit ? OffSet ?"; int offset = page * row; Object[] params = new Object[] { channelId, row, offset }; List<EnterpriseArticle> list = jdbcTemplate.query(sql, params, new RowMapper<EnterpriseArticle>() { @Override public EnterpriseArticle mapRow(ResultSet rs, int rowNum) throws SQLException { return interactionRowMapper(rs); } }); return list; } public int getEnterpriseArticleCount(Integer channelId) { if (channelId == null) { String sql = "Select count(id) From particular_enterprise_article where release=true "; return (int) jdbcTemplate.queryForLong(sql); } else { String sql = "Select count(id) From particular_enterprise_article where channel_id=? and release=true"; Object[] params = new Object[] { channelId }; return (int) jdbcTemplate.queryForLong(sql, params); } } private EnterpriseArticle interactionRowMapper(ResultSet rs) throws SQLException { EnterpriseArticle vo = new EnterpriseArticle(); vo.setId(rs.getLong("id")); vo.setDense(Dense.valueOf(rs.getString("dense"))); vo.setPublished(rs.getDate("published")); vo.setEnterpriseBasic(frontEnterpriseBasicDAO.get(rs.getLong("enterprisebasic_yyzzzch"))); return vo; } }