多条件查询

protected NamedParameterJdbcTemplate jdbcTemplate;

public DataGrid query(QueryCriteria qc) {
        Class<RivGeneralConfig> clazz = RivGeneralConfig.class;

        Integer currentPage = null;
        Integer pageSize = null;
        List<Object> params = new ArrayList<Object>();
        String sql = " select " + SqlUtils.buildProjectionClause(clazz) + " from riv_general_config gc  ";
        
        String whereClause = "";
        if (qc != null) {
            Map<String, Object> criterias = qc.getCriterias();
            if (criterias != null) {
                String scope = (String) criterias.get("gcScope");
                if(scope != null && scope.equalsIgnoreCase("tx")) {
                    whereClause = " where gc.gc_scope = ? or gc.gc_scope = ? or gc.gc_scope = ? or gc.gc_scope = ? ";
                    params.add("tx_in");
                    params.add("tx_out");
                    params.add("tx_mat_status_change");
                    params.add("tx_inventory");
                } else {
                    if(scope != null) {
                        whereClause = " where gc.gc_scope = ? ";
                        params.add(scope);
                    }
                }
            }
        }
        sql = sql + whereClause ;

        String countSql = " select count(*) from riv_general_config gc ";
        countSql = countSql + whereClause ;

        Integer totalCount = jdbcTemplate.getJdbcOperations().queryForObject(countSql, params.toArray(), Integer.class);
        pageSize = totalCount;
        currentPage = 1;

        StringBuilder sb = new StringBuilder();
        sb.append(sql);
        sb.append(" limit " + (currentPage - 1) * pageSize + " , " + pageSize);

        List<RivGeneralConfig> rows = new ArrayList<RivGeneralConfig>();

        rows = jdbcTemplate.getJdbcOperations().query(sb.toString(), params.toArray(), new BeanPropertyRowMapper<RivGeneralConfig>(clazz));

        DataGrid dg = new DataGrid();
        dg.setCurrentPage(currentPage);
        dg.setPageSize(pageSize);
        dg.setRows(rows);
        dg.setTotal(totalCount.longValue());
        return dg;
    }

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;


@SuppressWarnings("rawtypes")
public class DataGrid {

    // total count
    private Long total = 0L;

    // result set
    private Collection rows = new ArrayList();

    // current page
    private Integer currentPage;

    // page size
    private Integer pageSize;

    public Integer getCurrentPage() {
        return currentPage;
    }

    public void setCurrentPage(Integer currentPage) {
        this.currentPage = currentPage;
    }

    public Integer getPageSize() {
        return pageSize;
    }

    public void setPageSize(Integer pageSize) {
        this.pageSize = pageSize;
    }

    public Long getTotal() {
        return total;
    }

    public void setTotal(Long total) {
        this.total = total;
    }

    /**
     * @return the rows
     */
    public Collection getRows() {
        return rows;
    }

    /**
     * @param rows the rows to set
     */
    public void setRows(Collection rows) {
        this.rows = rows;
    }
    
    public static DataGrid constructEmptyDataGrid(PageProxy pageProxy) {
        
        DataGrid dg = new DataGrid();
        if(pageProxy != null) {
            dg.setCurrentPage(pageProxy.getCurrentPage() == null ? 10 : pageProxy.getCurrentPage() );
            dg.setPageSize(pageProxy.getPageSize() == null ? 1 : pageProxy.getPageSize());
        } else {
            dg.setCurrentPage(10);
            dg.setPageSize(1);
        }
        
        dg.setTotal(0L);
        dg.setRows(Collections.EMPTY_LIST);
        return dg;
    }
}

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


public class QueryCriteria {
    
    /**order proxies */
    private List<OrderProxy> orderProxies = new ArrayList<OrderProxy>();
    
    /**page proxy */
    private PageProxy pageProxy;
    
    /** criterias */
    private Map<String, Object> criterias = new HashMap<String, Object>();

    public List<OrderProxy> getOrderProxies() {
        return orderProxies;
    }

    public void setOrderProxies(List<OrderProxy> orderProxies) {
        this.orderProxies = orderProxies;
    }

    public PageProxy getPageProxy() {
        return pageProxy;
    }

    public void setPageProxy(PageProxy pageProxy) {
        this.pageProxy = pageProxy;
    }

    public Map<String, Object> getCriterias() {
        return criterias;
    }

    public void setCriterias(Map<String, Object> criterias) {
        this.criterias = criterias;
    }
    
}

public class OrderProxy {

    // ASC ORDER
    public static final String ASC = "ASC";

    // DESC ORDER
    public static final String DESC = "DESC";

    /** order field */
    private String orderField;

    /** order indicator */
    private String orderIndicator;

    public String getOrderField() {
        return orderField;
    }

    public void setOrderField(String orderField) {
        this.orderField = orderField;
    }

    public String getOrderIndicator() {
        return orderIndicator;
    }

    public void setOrderIndicator(String orderIndicator) {
        this.orderIndicator = orderIndicator;
    }

}

public class PageProxy {
    
    /**page size*/
    private Integer pageSize;
    
    /**current page*/
    private Integer currentPage;

    public Integer getPageSize() {
        return pageSize;
    }

    public void setPageSize(Integer pageSize) {
        this.pageSize = pageSize;
    }

    public Integer getCurrentPage() {
        return currentPage;
    }

    public void setCurrentPage(Integer currentPage) {
        this.currentPage = currentPage;
    }
}