We use the current weak lensing data to constrain the equation of state of dark energy w and the total mass of massive neutrinos \sum m _ { \nu } .
The constraint on w would be weak if only the current weak lensing data are used .
With the addition of other observational data such as the type Ia supernovae , baryon acoustic oscillation , and the high redshift Hubble parameter data H ( z ) derived from relative galaxy ages to break the degeneracy , the result is significantly improved .
For the pure w CDM model without massive neutrinos , we find w = -1.00 ^ { +0.10 } _ { -0.12 } .
For the w CDM model with the massive neutrino component , we show that the constraint on w is almost unchanged , there is very little degeneracy between w and \sum m _ { \nu } .
After marginalizing over other parameters , we obtain the probability distribution function of \sum m _ { \nu } , and find that the upper limit is \sum m _ { \nu } \leq 0.8 eV at 95.5 \% confidence level for the combined data sets .
Our constraints of w and \sum m _ { \nu } are both compatible and comparable with the constraints obtained from the WMAP 5-year data .