public Wcrash getWcrashInfo(int id) { String sql = "select plateform_id,android_version,app_version_code,app_version_name,device_id," + "model,brand,product,stack_trace,crash_date,package_name from wcrash where id = ? "; return this.jdbcTemplate.queryForObject( sql, new Object[]{id}, new RowMapper<Wcrash>(){ @Override public Wcrash mapRow(ResultSet rs, int i) throws SQLException { Wcrash wcrash = new Wcrash(); wcrash.setPlateformId(toNullStr(rs.getString("plateform_id"))); wcrash.setAndroidVersion(toNullStr(rs.getString("android_version"))); wcrash.setAppVersionCode(toNullStr(rs.getString("app_version_code"))); wcrash.setAppVersionName(toNullStr(rs.getString("app_version_name"))); wcrash.setDeviceId(toNullStr(rs.getString("device_id"))); wcrash.setModel(toNullStr(rs.getString("model"))); wcrash.setBrand(toNullStr(rs.getString("brand"))); wcrash.setProduct(toNullStr(rs.getString("product"))); wcrash.setStackTrace(toNullStr(rs.getString("stack_trace"))); wcrash.setCrashDate(toNullStr(rs.getString("crash_date"))); wcrash.setPackageName(toNullStr(rs.getString("package_name"))); return wcrash; } }); }
异常信息：
org.springframework.dao.EmptyResultDataAccessException: Incorrect result
size: expected 1, actual 0
at
org.springframework.dao.support.DataAccessUtils.requiredSingleResult(DataAccessUtils.java:71)
at
org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:729)
queryForObject无记录时会抛出异常，而对于query()list的类型不会抛出此异常。解决方法就是捕获这个异常然后在catch中返回null就可以。修改代码如下：
public Wcrash getWcrashInfo(int id) { String sql = "select plateform_id,android_version,app_version_code,app_version_name,device_id," + "model,brand,product,stack_trace,crash_date,package_name from wcrash where id = ? "; try{ return this.jdbcTemplate.queryForObject( sql, new Object[]{id}, new RowMapper<Wcrash>(){ @Override public Wcrash mapRow(ResultSet rs, int i) throws SQLException { Wcrash wcrash = new Wcrash(); wcrash.setPlateformId(toNullStr(rs.getString("plateform_id"))); wcrash.setAndroidVersion(toNullStr(rs.getString("android_version"))); wcrash.setAppVersionCode(toNullStr(rs.getString("app_version_code"))); wcrash.setAppVersionName(toNullStr(rs.getString("app_version_name"))); wcrash.setDeviceId(toNullStr(rs.getString("device_id"))); wcrash.setModel(toNullStr(rs.getString("model"))); wcrash.setBrand(toNullStr(rs.getString("brand"))); wcrash.setProduct(toNullStr(rs.getString("product"))); wcrash.setStackTrace(toNullStr(rs.getString("stack_trace"))); wcrash.setCrashDate(toNullStr(rs.getString("crash_date"))); wcrash.setPackageName(toNullStr(rs.getString("package_name"))); return wcrash; } }); }catch(EmptyResultDataAccessException e){ return null; } }
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